Re: [PATCH v2 0/4] Speed up boot with faster linear map creation

[Itaru Kitayama <itaru.kitayama@linux.dev>]

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Hi Ryan,

> On Apr 8, 2024, at 16:30, Ryan Roberts <ryan.roberts@arm.com> wrote:
> 
> On 06/04/2024 11:31, Itaru Kitayama wrote:
>> Hi Ryan,
>> 
>> On Sat, Apr 06, 2024 at 09:32:34AM +0100, Ryan Roberts wrote:
>>> Hi Itaru,
>>> 
>>> On 05/04/2024 08:39, Itaru Kitayama wrote:
>>>> On Thu, Apr 04, 2024 at 03:33:04PM +0100, Ryan Roberts wrote:
>>>>> Hi All,
>>>>> 
>>>>> It turns out that creating the linear map can take a significant proportion of
>>>>> the total boot time, especially when rodata=full. And most of the time is spent
>>>>> waiting on superfluous tlb invalidation and memory barriers. This series reworks
>>>>> the kernel pgtable generation code to significantly reduce the number of those
>>>>> TLBIs, ISBs and DSBs. See each patch for details.
>>>>> 
>>>>> The below shows the execution time of map_mem() across a couple of different
>>>>> systems with different RAM configurations. We measure after applying each patch
>>>>> and show the improvement relative to base (v6.9-rc2):
>>>>> 
>>>>>               | Apple M2 VM | Ampere Altra| Ampere Altra| Ampere Altra
>>>>>               | VM, 16G     | VM, 64G     | VM, 256G    | Metal, 512G
>>>>> ---------------|-------------|-------------|-------------|-------------
>>>>>               |   ms    (%) |   ms    (%) |   ms    (%) |    ms    (%)
>>>>> ---------------|-------------|-------------|-------------|-------------
>>>>> base           |  153   (0%) | 2227   (0%) | 8798   (0%) | 17442   (0%)
>>>>> no-cont-remap  |   77 (-49%) |  431 (-81%) | 1727 (-80%) |  3796 (-78%)
>>>>> batch-barriers |   13 (-92%) |  162 (-93%) |  655 (-93%) |  1656 (-91%)
>>>>> no-alloc-remap |   11 (-93%) |  109 (-95%) |  449 (-95%) |  1257 (-93%)
>>>>> lazy-unmap     |    6 (-96%) |   61 (-97%) |  257 (-97%) |   838 (-95%)
>>>>> 
>>>>> This series applies on top of v6.9-rc2. All mm selftests pass. I've compile and
>>>>> boot tested various PAGE_SIZE and VA size configs.
>>>>> 
>>>>> ---
>>>>> 
>>>>> Changes since v1 [1]
>>>>> ====================
>>>>> 
>>>>>  - Added Tested-by tags (thanks to Eric and Itaru)
>>>>>  - Renamed ___set_pte() -> __set_pte_nosync() (per Ard)
>>>>>  - Reordered patches (biggest impact & least controversial first)
>>>>>  - Reordered alloc/map/unmap functions in mmu.c to aid reader
>>>>>  - pte_clear() -> __pte_clear() in clear_fixmap_nosync()
>>>>>  - Reverted generic p4d_index() which caused x86 build error. Replaced with
>>>>>    unconditional p4d_index() define under arm64.
>>>>> 
>>>>> 
>>>>> [1] https://lore.kernel.org/linux-arm-kernel/20240326101448.3453626-1-ryan.roberts@arm.com/
>>>>> 
>>>>> Thanks,
>>>>> Ryan
>>>>> 
>>>>> 
>>>>> Ryan Roberts (4):
>>>>>  arm64: mm: Don't remap pgtables per-cont(pte|pmd) block
>>>>>  arm64: mm: Batch dsb and isb when populating pgtables
>>>>>  arm64: mm: Don't remap pgtables for allocate vs populate
>>>>>  arm64: mm: Lazily clear pte table mappings from fixmap
>>>>> 
>>>>> arch/arm64/include/asm/fixmap.h  |   5 +-
>>>>> arch/arm64/include/asm/mmu.h     |   8 +
>>>>> arch/arm64/include/asm/pgtable.h |  13 +-
>>>>> arch/arm64/kernel/cpufeature.c   |  10 +-
>>>>> arch/arm64/mm/fixmap.c           |  11 +
>>>>> arch/arm64/mm/mmu.c              | 377 +++++++++++++++++++++++--------
>>>>> 6 files changed, 319 insertions(+), 105 deletions(-)
>>>>> 
>>>>> --
>>>>> 2.25.1
>>>>> 
>>>> 
>>>> I've build and boot tested the v2 on FVP, base is taken from your
>>>> linux-rr repo. Running run_vmtests.sh on v2 left some gup longterm not oks, would you take a look at it? The mm ksefltests used is from your linux-rr repo too.
>>> 
>>> Thanks for taking a look at this.
>>> 
>>> I can't reproduce your issue unfortunately; steps as follows on Apple M2 VM:
>>> 
>>> Config: arm64 defconfig + the following:
>>> 
>>> # Squashfs for snaps, xfs for large file folios.
>>> ./scripts/config --enable CONFIG_SQUASHFS_LZ4
>>> ./scripts/config --enable CONFIG_SQUASHFS_LZO
>>> ./scripts/config --enable CONFIG_SQUASHFS_XZ
>>> ./scripts/config --enable CONFIG_SQUASHFS_ZSTD
>>> ./scripts/config --enable CONFIG_XFS_FS
>>> 
>>> # For general mm debug.
>>> ./scripts/config --enable CONFIG_DEBUG_VM
>>> ./scripts/config --enable CONFIG_DEBUG_VM_MAPLE_TREE
>>> ./scripts/config --enable CONFIG_DEBUG_VM_RB
>>> ./scripts/config --enable CONFIG_DEBUG_VM_PGFLAGS
>>> ./scripts/config --enable CONFIG_DEBUG_VM_PGTABLE
>>> ./scripts/config --enable CONFIG_PAGE_TABLE_CHECK
>>> 
>>> # For mm selftests.
>>> ./scripts/config --enable CONFIG_USERFAULTFD
>>> ./scripts/config --enable CONFIG_TEST_VMALLOC
>>> ./scripts/config --enable CONFIG_GUP_TEST
>>> 
>>> Running on VM with 12G memory, split across 2 (emulated) NUMA nodes (needed by
>>> some mm selftests), with kernel command line to reserve hugetlbs and other
>>> features required by some mm selftests:
>>> 
>>> "
>>> transparent_hugepage=madvise earlycon root=/dev/vda2 secretmem.enable
>>> hugepagesz=1G hugepages=0:2,1:2 hugepagesz=32M hugepages=0:2,1:2
>>> default_hugepagesz=2M hugepages=0:64,1:64 hugepagesz=64K hugepages=0:2,1:2
>>> "
>>> 
>>> Ubuntu userspace running off XFS rootfs. Build and run mm selftests from same
>>> git tree.
>>> 
>>> 
>>> Although I don't think any of this config should make a difference to gup_longterm.
>>> 
>>> Looks like your errors are all "ftruncate() failed". I've seen this problem on
>>> our CI system. There it is due to running the tests from NFS file system. What
>>> filesystem are you using? Perhaps you are sharing into the FVP using 9p? That
>>> might also be problematic.
>> 
>> That was it. This time I booted up the kernel including your series on
>> QEMU on my M1 and executed the gup_longterm program without the ftruncate
>> failures. When testing your kernel on FVP, I was executing the script from the FVP's host filesystem using 9p.
> 
> I'm not sure exactly what the root cause is. Perhaps there isn't enough space on
> the disk? It might be worth enhancing the error log to provide the errno in
> tools/testing/selftests/mm/gup_longterm.c.
> 

Attached is the strace’d gup_longterm executiong log on your pgtable-boot-speedup-v2 kernel.

Thanks,
Itaru.

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execve("./gup_longterm", ["./gup_longterm"], 0xffffc8e27490 /* 12 vars */) = 0
brk(NULL)                               = 0xaaaafb5dc000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xffff8727d000
faccessat(AT_FDCWD, "/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\260\265\2\0\0\0\0\0"..., 832) = 832
newfstatat(3, "", {st_mode=S_IFREG|0755, st_size=1605640, ...}, AT_EMPTY_PATH) = 0
mmap(NULL, 1650608, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff870ea000
mmap(0xffff8726c000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x182000) = 0xffff8726c000
mmap(0xffff87271000, 49072, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffff87271000
close(3)                                = 0
set_tid_address(0xffff8727def0)         = 194
set_robust_list(0xffff8727df00, 24)     = 0
rseq(0xffff8727e540, 0x20, 0, 0xd428bc00) = 0
mprotect(0xffff8726c000, 12288, PROT_READ) = 0
mprotect(0xaaaae548f000, 4096, PROT_READ) = 0
mprotect(0xffff872a8000, 8192, PROT_READ) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
openat(AT_FDCWD, "/sys/kernel/mm/hugepages/", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0
getrandom("\xc0\xaf\xa1\xd8\x09\x56\x5c\x4d", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0xaaaafb5dc000
brk(0xaaaafb5fd000)                     = 0xaaaafb5fd000
getdents64(3, 0xaaaafb5dc2d0 /* 6 entries */, 32768) = 208
newfstatat(1, "", {st_mode=S_IFIFO|0600, st_size=0, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0xaaaafb5dc2d0 /* 0 entries */, 32768) = 0
close(3)                                = 0
openat(AT_FDCWD, "/sys/kernel/debug/gup_test", O_RDWR) = -1 ENOENT (No such file or directory)
memfd_create("test", 0)                 = 3
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x82baf8fa, 0x71479f87]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffff870e9000
munmap(0xffff870e9000, 4096)            = 0
close(3)                                = 0
openat(AT_FDCWD, "/tmp", O_RDWR|O_EXCL|O_TMPFILE, 0600) = 3
fcntl(3, F_GETFL)                       = 0x424002 (flags O_RDWR|O_LARGEFILE|O_TMPFILE)
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=416024, f_bfree=416007, f_bavail=416007, f_files=416024, f_ffree=416018, f_fsid={val=[0x1357e84b, 0x1c37069b]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffff870e9000
munmap(0xffff870e9000, 4096)            = 0
close(3)                                = 0
openat(AT_FDCWD, "gup_longterm.c_tmpfile_twSAYO", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
unlinkat(AT_FDCWD, "gup_longterm.c_tmpfile_twSAYO", 0) = 0
fstatfs(3, 0xffffe505a840)              = -1 EOPNOTSUPP (Operation not supported)
ftruncate(3, 4096)                      = -1 ENOENT (No such file or directory)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|21<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=2097152, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x10, 0]}, f_namelen=255, f_frsize=2097152, f_flags=ST_VALID}) = 0
ftruncate(3, 2097152)                   = 0
fallocate(3, 0, 0, 2097152)             = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|25<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=33554432, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x12, 0]}, f_namelen=255, f_frsize=33554432, f_flags=ST_VALID}) = 0
ftruncate(3, 33554432)                  = 0
fallocate(3, 0, 0, 33554432)            = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|16<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=65536, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x13, 0]}, f_namelen=255, f_frsize=65536, f_flags=ST_VALID}) = 0
ftruncate(3, 65536)                     = 0
fallocate(3, 0, 0, 65536)               = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|30<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=1073741824, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x11, 0]}, f_namelen=255, f_frsize=1073741824, f_flags=ST_VALID}) = 0
ftruncate(3, 1073741824)                = 0
fallocate(3, 0, 0, 1073741824)          = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", 0)                 = 3
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x82baf8fa, 0x71479f87]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffff870e9000
munmap(0xffff870e9000, 4096)            = 0
close(3)                                = 0
openat(AT_FDCWD, "/tmp", O_RDWR|O_EXCL|O_TMPFILE, 0600) = 3
fcntl(3, F_GETFL)                       = 0x424002 (flags O_RDWR|O_LARGEFILE|O_TMPFILE)
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=416024, f_bfree=416007, f_bavail=416007, f_files=416024, f_ffree=416018, f_fsid={val=[0x1357e84b, 0x1c37069b]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffff870e9000
munmap(0xffff870e9000, 4096)            = 0
close(3)                                = 0
openat(AT_FDCWD, "gup_longterm.c_tmpfile_vDLIRw", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
unlinkat(AT_FDCWD, "gup_longterm.c_tmpfile_vDLIRw", 0) = 0
fstatfs(3, 0xffffe505a840)              = -1 EOPNOTSUPP (Operation not supported)
ftruncate(3, 4096)                      = -1 ENOENT (No such file or directory)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|21<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=2097152, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x10, 0]}, f_namelen=255, f_frsize=2097152, f_flags=ST_VALID}) = 0
ftruncate(3, 2097152)                   = 0
fallocate(3, 0, 0, 2097152)             = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|25<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=33554432, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x12, 0]}, f_namelen=255, f_frsize=33554432, f_flags=ST_VALID}) = 0
ftruncate(3, 33554432)                  = 0
fallocate(3, 0, 0, 33554432)            = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|16<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=65536, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x13, 0]}, f_namelen=255, f_frsize=65536, f_flags=ST_VALID}) = 0
ftruncate(3, 65536)                     = 0
fallocate(3, 0, 0, 65536)               = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|30<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=1073741824, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x11, 0]}, f_namelen=255, f_frsize=1073741824, f_flags=ST_VALID}) = 0
ftruncate(3, 1073741824)                = 0
fallocate(3, 0, 0, 1073741824)          = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", 0)                 = 3
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x82baf8fa, 0x71479f87]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffff870e9000
munmap(0xffff870e9000, 4096)            = 0
close(3)                                = 0
openat(AT_FDCWD, "/tmp", O_RDWR|O_EXCL|O_TMPFILE, 0600) = 3
fcntl(3, F_GETFL)                       = 0x424002 (flags O_RDWR|O_LARGEFILE|O_TMPFILE)
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=416024, f_bfree=416007, f_bavail=416007, f_files=416024, f_ffree=416018, f_fsid={val=[0x1357e84b, 0x1c37069b]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffff870e9000
munmap(0xffff870e9000, 4096)            = 0
close(3)                                = 0
openat(AT_FDCWD, "gup_longterm.c_tmpfile_TBRsO0", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
unlinkat(AT_FDCWD, "gup_longterm.c_tmpfile_TBRsO0", 0) = 0
fstatfs(3, 0xffffe505a840)              = -1 EOPNOTSUPP (Operation not supported)
ftruncate(3, 4096)                      = -1 ENOENT (No such file or directory)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|21<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=2097152, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x10, 0]}, f_namelen=255, f_frsize=2097152, f_flags=ST_VALID}) = 0
ftruncate(3, 2097152)                   = 0
fallocate(3, 0, 0, 2097152)             = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|25<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=33554432, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x12, 0]}, f_namelen=255, f_frsize=33554432, f_flags=ST_VALID}) = 0
ftruncate(3, 33554432)                  = 0
fallocate(3, 0, 0, 33554432)            = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|16<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=65536, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x13, 0]}, f_namelen=255, f_frsize=65536, f_flags=ST_VALID}) = 0
ftruncate(3, 65536)                     = 0
fallocate(3, 0, 0, 65536)               = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|30<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=1073741824, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x11, 0]}, f_namelen=255, f_frsize=1073741824, f_flags=ST_VALID}) = 0
ftruncate(3, 1073741824)                = 0
fallocate(3, 0, 0, 1073741824)          = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", 0)                 = 3
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x82baf8fa, 0x71479f87]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffff870e9000
munmap(0xffff870e9000, 4096)            = 0
close(3)                                = 0
openat(AT_FDCWD, "/tmp", O_RDWR|O_EXCL|O_TMPFILE, 0600) = 3
fcntl(3, F_GETFL)                       = 0x424002 (flags O_RDWR|O_LARGEFILE|O_TMPFILE)
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=416024, f_bfree=416007, f_bavail=416007, f_files=416024, f_ffree=416018, f_fsid={val=[0x1357e84b, 0x1c37069b]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffff870e9000
munmap(0xffff870e9000, 4096)            = 0
close(3)                                = 0
openat(AT_FDCWD, "gup_longterm.c_tmpfile_jwd7gF", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
unlinkat(AT_FDCWD, "gup_longterm.c_tmpfile_jwd7gF", 0) = 0
fstatfs(3, 0xffffe505a840)              = -1 EOPNOTSUPP (Operation not supported)
ftruncate(3, 4096)                      = -1 ENOENT (No such file or directory)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|21<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=2097152, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x10, 0]}, f_namelen=255, f_frsize=2097152, f_flags=ST_VALID}) = 0
ftruncate(3, 2097152)                   = 0
fallocate(3, 0, 0, 2097152)             = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|25<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=33554432, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x12, 0]}, f_namelen=255, f_frsize=33554432, f_flags=ST_VALID}) = 0
ftruncate(3, 33554432)                  = 0
fallocate(3, 0, 0, 33554432)            = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|16<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=65536, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x13, 0]}, f_namelen=255, f_frsize=65536, f_flags=ST_VALID}) = 0
ftruncate(3, 65536)                     = 0
fallocate(3, 0, 0, 65536)               = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|30<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=1073741824, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x11, 0]}, f_namelen=255, f_frsize=1073741824, f_flags=ST_VALID}) = 0
ftruncate(3, 1073741824)                = 0
fallocate(3, 0, 0, 1073741824)          = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", 0)                 = 3
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x82baf8fa, 0x71479f87]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffff870e9000
munmap(0xffff870e9000, 4096)            = 0
close(3)                                = 0
openat(AT_FDCWD, "/tmp", O_RDWR|O_EXCL|O_TMPFILE, 0600) = 3
fcntl(3, F_GETFL)                       = 0x424002 (flags O_RDWR|O_LARGEFILE|O_TMPFILE)
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=416024, f_bfree=416007, f_bavail=416007, f_files=416024, f_ffree=416018, f_fsid={val=[0x1357e84b, 0x1c37069b]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffff870e9000
munmap(0xffff870e9000, 4096)            = 0
close(3)                                = 0
openat(AT_FDCWD, "gup_longterm.c_tmpfile_XrL4Qd", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
unlinkat(AT_FDCWD, "gup_longterm.c_tmpfile_XrL4Qd", 0) = 0
fstatfs(3, 0xffffe505a840)              = -1 EOPNOTSUPP (Operation not supported)
ftruncate(3, 4096)                      = -1 ENOENT (No such file or directory)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|21<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=2097152, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x10, 0]}, f_namelen=255, f_frsize=2097152, f_flags=ST_VALID}) = 0
ftruncate(3, 2097152)                   = 0
fallocate(3, 0, 0, 2097152)             = -1 ENOSPC (No space left on device)
close(3)                                = 0
write(1, "# [INFO] detected hugetlb page s"..., 4096# [INFO] detected hugetlb page size: 2048 KiB
# [INFO] detected hugetlb page size: 32768 KiB
# [INFO] detected hugetlb page size: 64 KiB
# [INFO] detected hugetlb page size: 1048576 KiB
TAP version 13
1..56
# [RUN] R/W longterm GUP pin in MAP_SHARED file mapping ... with memfd
ok 1 # SKIP gup_test not available
# [RUN] R/W longterm GUP pin in MAP_SHARED file mapping ... with tmpfile
ok 2 # SKIP gup_test not available
# [RUN] R/W longterm GUP pin in MAP_SHARED file mapping ... with local tmpfile
not ok 3 ftruncate() failed
# [RUN] R/W longterm GUP pin in MAP_SHARED file mapping ... with memfd hugetlb (2048 kB)
ok 4 # SKIP need more free huge pages
# [RUN] R/W longterm GUP pin in MAP_SHARED file mapping ... with memfd hugetlb (32768 kB)
ok 5 # SKIP need more free huge pages
# [RUN] R/W longterm GUP pin in MAP_SHARED file mapping ... with memfd hugetlb (64 kB)
ok 6 # SKIP need more free huge pages
# [RUN] R/W longterm GUP pin in MAP_SHARED file mapping ... with memfd hugetlb (1048576 kB)
ok 7 # SKIP need more free huge pages
# [RUN] R/W longterm GUP-fast pin in MAP_SHARED file mapping ... with memfd
ok 8 # SKIP gup_test not available
# [RUN] R/W longterm GUP-fast pin in MAP_SHARED file mapping ... with tmpfile
ok 9 # SKIP gup_test not available
# [RUN] R/W longterm GUP-fast pin in MAP_SHARED file mapping ... with local tmpfile
not ok 10 ftruncate() failed
# [RUN] R/W longterm GUP-fast pin in MAP_SHARED file mapping ... with memfd hugetlb (2048 kB)
ok 11 # SKIP need more free huge pages
# [RUN] R/W longterm GUP-fast pin in MAP_SHARED file mapping ... with memfd hugetlb (32768 kB)
ok 12 # SKIP need more free huge pages
# [RUN] R/W longterm GUP-fast pin in MAP_SHARED file mapping ... with memfd hugetlb (64 kB)
ok 13 # SKIP need more free huge pages
# [RUN] R/W longterm GUP-fast pin in MAP_SHARED file mapping ... with memfd hugetlb (1048576 kB)
ok 14 # SKIP need more free huge pages
# [RUN] R/O longterm GUP pin in MAP_SHARED file mapping ... with memfd
ok 15 # SKIP gup_test not available
# [RUN] R/O longterm GUP pin in MAP_SHARED file mapping ... with tmpfile
ok 16 # SKIP gup_test not available
# [RUN] R/O longterm GUP pin in MAP_SHARED file mapping ... with local tmpfile
not ok 17 ftruncate() failed
# [RUN] R/O longterm GUP pin in MAP_SHARED file mapping ... with memfd hugetlb (2048 kB)
ok 18 # SKIP need more free huge pages
# [RUN] R/O longterm GUP pin in MAP_SHARED file mapping ... with memfd hugetlb (32768 kB)
ok 19 # SKIP need more free huge pages
# [RUN] R/O longterm GUP pin in MAP_SHARED file mapping ... with memfd hugetlb (64 kB)
ok 20 # SKIP need more free huge pages
# [RUN] R/O longterm GUP pin in MAP_SHARED file mapping ... with memfd hugetlb (1048576 kB)
ok 21 # SKIP need more free huge pages
# [RUN] R/O longterm GUP-fast pin in MAP_SHARED file mapping ... with memfd
ok 22 # SKIP gup_test not available
# [RUN] R/O longterm GUP-fast pin in MAP_SHARED file mapping ... with tmpfile
ok 23 # SKIP gup_test not available
# [RUN] R/O longterm GUP-fast pin in MAP_SHARED file mapping ... with local tmpfile
not ok 24 ftruncate() failed
# [RUN] R/O longterm GUP-fast pin in MAP_SHARED file mapping ... with memfd hugetlb (2048 kB)
ok 25 # SKIP need more free huge pages
# [RUN] R/O longterm GUP-fast pin in MAP_SHARED file mapping ... with memfd hugetlb (32768 kB)
ok 26 # SKIP need more free huge pages
# [RUN] R/O longterm GUP-fast pin in MAP_SHARED file mapping ... with memfd hugetlb (64 kB)
ok 27 # SKIP need more free huge pages
# [RUN] R/O longterm GUP-fast pin in MAP_SHARED file mapping ... with memfd hugetlb (1048576 kB)
ok 28 # SKIP need more free huge pages
# [RUN] R/W longterm GUP pin in MAP_PRIVATE file mapping ... with memfd
ok 29 # SKIP gup_test not available
# [RUN] R/W longterm GUP pin in MAP_PRIVATE file mapping ... with tmpfile
ok 30 # SKIP gup_test not available
# [RUN] R/W longterm GUP pin in MAP_PRIVATE file mapping ... with local tmpfile
not ok 31 ftruncate() failed
# [RUN] R/W longterm GUP pin in MAP_PRIVATE file mapping ... with memfd hugetlb (2048 kB)
ok 32 # SKIP need more free huge pages
# [RUN] R/W longterm) = 4096
write(1, " GUP pin in MAP_PRIVATE file map"..., 71 GUP pin in MAP_PRIVATE file mapping ... with memfd hugetlb (32768 kB)
) = 71
memfd_create("test", MFD_HUGETLB|25<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=33554432, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x12, 0]}, f_namelen=255, f_frsize=33554432, f_flags=ST_VALID}) = 0
ftruncate(3, 33554432)                  = 0
fallocate(3, 0, 0, 33554432)            = -1 ENOSPC (No space left on device)
write(1, "ok 33 # SKIP need more free huge"..., 39ok 33 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/W longterm GUP pin in "..., 88# [RUN] R/W longterm GUP pin in MAP_PRIVATE file mapping ... with memfd hugetlb (64 kB)
) = 88
memfd_create("test", MFD_HUGETLB|16<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=65536, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x13, 0]}, f_namelen=255, f_frsize=65536, f_flags=ST_VALID}) = 0
ftruncate(3, 65536)                     = 0
fallocate(3, 0, 0, 65536)               = -1 ENOSPC (No space left on device)
write(1, "ok 34 # SKIP need more free huge"..., 39ok 34 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/W longterm GUP pin in "..., 93# [RUN] R/W longterm GUP pin in MAP_PRIVATE file mapping ... with memfd hugetlb (1048576 kB)
) = 93
memfd_create("test", MFD_HUGETLB|30<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=1073741824, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x11, 0]}, f_namelen=255, f_frsize=1073741824, f_flags=ST_VALID}) = 0
ftruncate(3, 1073741824)                = 0
fallocate(3, 0, 0, 1073741824)          = -1 ENOSPC (No space left on device)
write(1, "ok 35 # SKIP need more free huge"..., 39ok 35 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/W longterm GUP-fast pi"..., 77# [RUN] R/W longterm GUP-fast pin in MAP_PRIVATE file mapping ... with memfd
) = 77
memfd_create("test", 0)                 = 3
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x82baf8fa, 0x71479f87]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffff870e9000
write(1, "ok 36 # SKIP gup_test not availa"..., 36ok 36 # SKIP gup_test not available
) = 36
munmap(0xffff870e9000, 4096)            = 0
close(3)                                = 0
write(1, "# [RUN] R/W longterm GUP-fast pi"..., 79# [RUN] R/W longterm GUP-fast pin in MAP_PRIVATE file mapping ... with tmpfile
) = 79
openat(AT_FDCWD, "/tmp", O_RDWR|O_EXCL|O_TMPFILE, 0600) = 3
fcntl(3, F_GETFL)                       = 0x424002 (flags O_RDWR|O_LARGEFILE|O_TMPFILE)
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=416024, f_bfree=416007, f_bavail=416007, f_files=416024, f_ffree=416018, f_fsid={val=[0x1357e84b, 0x1c37069b]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffff870e9000
write(1, "ok 37 # SKIP gup_test not availa"..., 36ok 37 # SKIP gup_test not available
) = 36
munmap(0xffff870e9000, 4096)            = 0
close(3)                                = 0
write(1, "# [RUN] R/W longterm GUP-fast pi"..., 85# [RUN] R/W longterm GUP-fast pin in MAP_PRIVATE file mapping ... with local tmpfile
) = 85
openat(AT_FDCWD, "gup_longterm.c_tmpfile_vdu0ET", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
unlinkat(AT_FDCWD, "gup_longterm.c_tmpfile_vdu0ET", 0) = 0
fstatfs(3, 0xffffe505a840)              = -1 EOPNOTSUPP (Operation not supported)
ftruncate(3, 4096)                      = -1 ENOENT (No such file or directory)
write(1, "not ok 38 ftruncate() failed\n", 29not ok 38 ftruncate() failed
) = 29
close(3)                                = 0
write(1, "# [RUN] R/W longterm GUP-fast pi"..., 95# [RUN] R/W longterm GUP-fast pin in MAP_PRIVATE file mapping ... with memfd hugetlb (2048 kB)
) = 95
memfd_create("test", MFD_HUGETLB|21<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=2097152, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x10, 0]}, f_namelen=255, f_frsize=2097152, f_flags=ST_VALID}) = 0
ftruncate(3, 2097152)                   = 0
fallocate(3, 0, 0, 2097152)             = -1 ENOSPC (No space left on device)
write(1, "ok 39 # SKIP need more free huge"..., 39ok 39 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/W longterm GUP-fast pi"..., 96# [RUN] R/W longterm GUP-fast pin in MAP_PRIVATE file mapping ... with memfd hugetlb (32768 kB)
) = 96
memfd_create("test", MFD_HUGETLB|25<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=33554432, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x12, 0]}, f_namelen=255, f_frsize=33554432, f_flags=ST_VALID}) = 0
ftruncate(3, 33554432)                  = 0
fallocate(3, 0, 0, 33554432)            = -1 ENOSPC (No space left on device)
write(1, "ok 40 # SKIP need more free huge"..., 39ok 40 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/W longterm GUP-fast pi"..., 93# [RUN] R/W longterm GUP-fast pin in MAP_PRIVATE file mapping ... with memfd hugetlb (64 kB)
) = 93
memfd_create("test", MFD_HUGETLB|16<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=65536, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x13, 0]}, f_namelen=255, f_frsize=65536, f_flags=ST_VALID}) = 0
ftruncate(3, 65536)                     = 0
fallocate(3, 0, 0, 65536)               = -1 ENOSPC (No space left on device)
write(1, "ok 41 # SKIP need more free huge"..., 39ok 41 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/W longterm GUP-fast pi"..., 98# [RUN] R/W longterm GUP-fast pin in MAP_PRIVATE file mapping ... with memfd hugetlb (1048576 kB)
) = 98
memfd_create("test", MFD_HUGETLB|30<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=1073741824, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x11, 0]}, f_namelen=255, f_frsize=1073741824, f_flags=ST_VALID}) = 0
ftruncate(3, 1073741824)                = 0
fallocate(3, 0, 0, 1073741824)          = -1 ENOSPC (No space left on device)
write(1, "ok 42 # SKIP need more free huge"..., 39ok 42 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP pin in "..., 72# [RUN] R/O longterm GUP pin in MAP_PRIVATE file mapping ... with memfd
) = 72
memfd_create("test", 0)                 = 3
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x82baf8fa, 0x71479f87]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffff870e9000
write(1, "ok 43 # SKIP gup_test not availa"..., 36ok 43 # SKIP gup_test not available
) = 36
munmap(0xffff870e9000, 4096)            = 0
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP pin in "..., 74# [RUN] R/O longterm GUP pin in MAP_PRIVATE file mapping ... with tmpfile
) = 74
openat(AT_FDCWD, "/tmp", O_RDWR|O_EXCL|O_TMPFILE, 0600) = 3
fcntl(3, F_GETFL)                       = 0x424002 (flags O_RDWR|O_LARGEFILE|O_TMPFILE)
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=416024, f_bfree=416007, f_bavail=416007, f_files=416024, f_ffree=416018, f_fsid={val=[0x1357e84b, 0x1c37069b]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffff870e9000
write(1, "ok 44 # SKIP gup_test not availa"..., 36ok 44 # SKIP gup_test not available
) = 36
munmap(0xffff870e9000, 4096)            = 0
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP pin in "..., 80# [RUN] R/O longterm GUP pin in MAP_PRIVATE file mapping ... with local tmpfile
) = 80
openat(AT_FDCWD, "gup_longterm.c_tmpfile_3KYzfZ", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
unlinkat(AT_FDCWD, "gup_longterm.c_tmpfile_3KYzfZ", 0) = 0
fstatfs(3, 0xffffe505a840)              = -1 EOPNOTSUPP (Operation not supported)
ftruncate(3, 4096)                      = -1 ENOENT (No such file or directory)
write(1, "not ok 45 ftruncate() failed\n", 29not ok 45 ftruncate() failed
) = 29
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP pin in "..., 90# [RUN] R/O longterm GUP pin in MAP_PRIVATE file mapping ... with memfd hugetlb (2048 kB)
) = 90
memfd_create("test", MFD_HUGETLB|21<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=2097152, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x10, 0]}, f_namelen=255, f_frsize=2097152, f_flags=ST_VALID}) = 0
ftruncate(3, 2097152)                   = 0
fallocate(3, 0, 0, 2097152)             = -1 ENOSPC (No space left on device)
write(1, "ok 46 # SKIP need more free huge"..., 39ok 46 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP pin in "..., 91# [RUN] R/O longterm GUP pin in MAP_PRIVATE file mapping ... with memfd hugetlb (32768 kB)
) = 91
memfd_create("test", MFD_HUGETLB|25<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=33554432, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x12, 0]}, f_namelen=255, f_frsize=33554432, f_flags=ST_VALID}) = 0
ftruncate(3, 33554432)                  = 0
fallocate(3, 0, 0, 33554432)            = -1 ENOSPC (No space left on device)
write(1, "ok 47 # SKIP need more free huge"..., 39ok 47 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP pin in "..., 88# [RUN] R/O longterm GUP pin in MAP_PRIVATE file mapping ... with memfd hugetlb (64 kB)
) = 88
memfd_create("test", MFD_HUGETLB|16<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=65536, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x13, 0]}, f_namelen=255, f_frsize=65536, f_flags=ST_VALID}) = 0
ftruncate(3, 65536)                     = 0
fallocate(3, 0, 0, 65536)               = -1 ENOSPC (No space left on device)
write(1, "ok 48 # SKIP need more free huge"..., 39ok 48 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP pin in "..., 93# [RUN] R/O longterm GUP pin in MAP_PRIVATE file mapping ... with memfd hugetlb (1048576 kB)
) = 93
memfd_create("test", MFD_HUGETLB|30<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=1073741824, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x11, 0]}, f_namelen=255, f_frsize=1073741824, f_flags=ST_VALID}) = 0
ftruncate(3, 1073741824)                = 0
fallocate(3, 0, 0, 1073741824)          = -1 ENOSPC (No space left on device)
write(1, "ok 49 # SKIP need more free huge"..., 39ok 49 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP-fast pi"..., 77# [RUN] R/O longterm GUP-fast pin in MAP_PRIVATE file mapping ... with memfd
) = 77
memfd_create("test", 0)                 = 3
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x82baf8fa, 0x71479f87]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffff870e9000
write(1, "ok 50 # SKIP gup_test not availa"..., 36ok 50 # SKIP gup_test not available
) = 36
munmap(0xffff870e9000, 4096)            = 0
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP-fast pi"..., 79# [RUN] R/O longterm GUP-fast pin in MAP_PRIVATE file mapping ... with tmpfile
) = 79
openat(AT_FDCWD, "/tmp", O_RDWR|O_EXCL|O_TMPFILE, 0600) = 3
fcntl(3, F_GETFL)                       = 0x424002 (flags O_RDWR|O_LARGEFILE|O_TMPFILE)
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=416024, f_bfree=416007, f_bavail=416007, f_files=416024, f_ffree=416018, f_fsid={val=[0x1357e84b, 0x1c37069b]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffff870e9000
write(1, "ok 51 # SKIP gup_test not availa"..., 36ok 51 # SKIP gup_test not available
) = 36
munmap(0xffff870e9000, 4096)            = 0
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP-fast pi"..., 85# [RUN] R/O longterm GUP-fast pin in MAP_PRIVATE file mapping ... with local tmpfile
) = 85
openat(AT_FDCWD, "gup_longterm.c_tmpfile_BLboOt", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
unlinkat(AT_FDCWD, "gup_longterm.c_tmpfile_BLboOt", 0) = 0
fstatfs(3, 0xffffe505a840)              = -1 EOPNOTSUPP (Operation not supported)
ftruncate(3, 4096)                      = -1 ENOENT (No such file or directory)
write(1, "not ok 52 ftruncate() failed\n", 29not ok 52 ftruncate() failed
) = 29
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP-fast pi"..., 95# [RUN] R/O longterm GUP-fast pin in MAP_PRIVATE file mapping ... with memfd hugetlb (2048 kB)
) = 95
memfd_create("test", MFD_HUGETLB|21<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=2097152, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x10, 0]}, f_namelen=255, f_frsize=2097152, f_flags=ST_VALID}) = 0
ftruncate(3, 2097152)                   = 0
fallocate(3, 0, 0, 2097152)             = -1 ENOSPC (No space left on device)
write(1, "ok 53 # SKIP need more free huge"..., 39ok 53 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP-fast pi"..., 96# [RUN] R/O longterm GUP-fast pin in MAP_PRIVATE file mapping ... with memfd hugetlb (32768 kB)
) = 96
memfd_create("test", MFD_HUGETLB|25<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=33554432, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x12, 0]}, f_namelen=255, f_frsize=33554432, f_flags=ST_VALID}) = 0
ftruncate(3, 33554432)                  = 0
fallocate(3, 0, 0, 33554432)            = -1 ENOSPC (No space left on device)
write(1, "ok 54 # SKIP need more free huge"..., 39ok 54 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP-fast pi"..., 93# [RUN] R/O longterm GUP-fast pin in MAP_PRIVATE file mapping ... with memfd hugetlb (64 kB)
) = 93
memfd_create("test", MFD_HUGETLB|16<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=65536, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x13, 0]}, f_namelen=255, f_frsize=65536, f_flags=ST_VALID}) = 0
ftruncate(3, 65536)                     = 0
fallocate(3, 0, 0, 65536)               = -1 ENOSPC (No space left on device)
write(1, "ok 55 # SKIP need more free huge"..., 39ok 55 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP-fast pi"..., 98# [RUN] R/O longterm GUP-fast pin in MAP_PRIVATE file mapping ... with memfd hugetlb (1048576 kB)
) = 98
memfd_create("test", MFD_HUGETLB|30<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=1073741824, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x11, 0]}, f_namelen=255, f_frsize=1073741824, f_flags=ST_VALID}) = 0
ftruncate(3, 1073741824)                = 0
fallocate(3, 0, 0, 1073741824)          = -1 ENOSPC (No space left on device)
write(1, "ok 56 # SKIP need more free huge"..., 39ok 56 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "Bail out! 8 out of 56 tests fail"..., 35Bail out! 8 out of 56 tests failed
) = 35
write(1, "# Totals: pass:0 fail:8 xfail:0 "..., 56# Totals: pass:0 fail:8 xfail:0 xpass:0 skip:48 error:0
) = 56
exit_group(1)                           = ?
+++ exited with 1 +++

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> Thanks,
> Ryan
> 
>> 
>> Thanks,
>> Itaru.
>> 
>>> 
>>> Does this problem reproduce with v6.9-rc2, without my patches? I except it
>>> probably does?
>>> 
>>> Thanks,
>>> Ryan
>>> 
>>>> 
>>>> Thanks,
>>>> Itaru.