Hi Uwe > > It only asks one way, when going from an upatched kernel to an patched > > one. Since i was coming from an preempt rt kernel to an unpatched one no > > questions where asked (probably since all settings where still in place > > as i wasn't using the preempt rt feature with the preempt rt patched > > kernel source aka "Low latency desktop") > I guess that when the kernel build updates .config your > ${PROJECT_DIR}/config/${PLATFORMNAME}/kernelconfig isn't adapted > accordingly. So yes, it might be out of sync. So better provide > ${PROJECT_DIR}/${PLATFORMNAME}/build/linux-3.0/.config please. I am pretty sure that ptxdist is dooing the right thing and the kernel config is up to date but will use the other config for further reports. > > But i think the regression when going from 3.0-rt7 to 3.0.1-rt8 with > > CONFIG_PREEMPT_RTB is more worthwhile to discuss. Which i detailed in the > > other mail. > You didn't talk about CONFIG_PREEMPT_RTB before, did you? I just used it > as indicator that the .config you sent isn't for an -rt kernel. No, the report before was for CONFIG_PREEMPT_LL. I know this is a little weird to use a preempt rt kernel without enabling the preempt rt. But it also improves latency. > Your machine is based on Phytec's pcm043? I could try to test on one of > those an unpatched -rt kernel, but I don't promise to come around to do it. If i understand you correctly you want a vanilla 3.0.1-rt8 bugsplat running on a pcm043? (Attached to this mail the .config from ${PROJECT_DIR}/${PLATFORMNAME}/build/linux-3.0.1/.config) Here we go 3.0.1-rt8 with CONFIG_PREEMPT_RTB=y: barebox 2011.05.0 (Jun 8 2011 - 16:15:33) Board: Phytec phyCORE-i.MX35 registered netconsole as cs1 NAND device: Manufacturer ID: 0xec, Chip ID: 0xd3 (Samsung NAND 1GiB 3,3V 8-bit) Bad block table found at page 524224, version 0x01 Bad block table found at page 524160, version 0x01 nand_read_bbt: Bad block at 0x151c0000 cfi_probe: cfi_flash base: 0xa0000000 size: 0x02000000 cfi_protect: protect 0xa0040000 (size 131072) Malloc space: 0x85f00000 -> 0x87f00000 (size 32 MB) Stack space : 0x85ef8000 -> 0x85f00000 (size 32 kB) running /env/bin/init... Hit any key to stop autoboot: 1 Verifying Checksum ... OK Image Name: Linux-3.0.1-rt8 Created: 2011-08-11 11:32:27 UTC Image Type: () Data Size: 1721232 Bytes = 1.6 MB Load Address: 80008000 Entry Point: 80008000 OK commandline: console=ttymxc0,115200 init=/usr/sbin/init lpj=2654208 quiet ip=none ubi.mtd=3 root=ubi0:root rootfstype=ubifs mtdparts=physmap- flash.0:256k(barebox)ro,128k(env),2M(kernel),-(rootfs);mxc_nand:-(data) arch_number: 2072 Starting kernel ... Uncompressing Linux... done, booting the kernel. drivers/rtc/hctosys.c: unable to open rtc device (rtc0) kernel BUG at mm/filemap.c:2043! Unable to handle kernel NULL pointer dereference at virtual address 00000000 pgd = c7a40000 [00000000] *pgd=87a44831, *pte=00000000, *ppte=00000000 Internal error: Oops: 817 [#1] PREEMPT Modules linked in: CPU: 0 Not tainted (3.0.1-rt8 #1) PC is at __bug+0x24/0x30 LR is at vprintk+0x398/0x404 pc : [] lr : [] psr: 60000013 sp : c7a29ce8 ip : c7a29c30 fp : c7a29cf4 r10: c7a79b60 r9 : 00000000 r8 : 00000000 r7 : 00000000 r6 : 00000008 r5 : c0334540 r4 : c7a29d78 r3 : 00000000 r2 : 00000002 r1 : 00000000 r0 : 00000027 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 00c5387d Table: 87a40008 DAC: 00000015 Process udevd (pid: 215, stack limit = 0xc7a28268) Stack: (0xc7a29ce8 to 0xc7a2a000) 9ce0: c7a29d14 c7a29cf8 c0076a98 c002cbd8 c7a29d78 c7a787a0 9d00: 00000008 c02530e0 c7a29d74 c7a29d18 c0076c18 c0076a60 00000008 00000000 9d20: c7a29d44 c7a29d40 c7a28000 00000000 00001000 00000000 00000000 00000000 9d40: c7a29d74 c0334540 c0041ccc 00000000 00000000 00000000 c7a79b60 c7a29d78 9d60: 00000000 00000000 c7a29dac c7a29d78 c0076d50 c0076b3c c7a29f10 00000001 9d80: 00000000 00000008 00000000 00000000 00000000 c7a79b60 c7a786f0 00000008 9da0: c7a29e3c c7a29db0 c0078f4c c0076d00 00000000 00000000 c7a29ed0 00000008 9dc0: 00000000 c0035100 c7a29dec c7a29dd8 c0035100 c002b620 c7a787a0 c7a29ed0 9de0: c7a29f10 c7a29e98 c008ecec c0035050 00000000 00000001 c7a29e24 c7a6db20 9e00: 40053000 00000000 c7a41000 00000008 c7a07860 00000000 c7a79b60 c7a7870c 9e20: 00000000 c7a29e98 c7a29f10 00000001 c7a29e8c c7a29e40 c0079010 c0078af0 9e40: c002b614 00000001 91827364 c7a29e4c c7a29e4c c7a29e54 c7a29e54 00000000 9e60: c7a29eb4 c7a79b60 c7a29e98 c7a29f70 c7a29f10 fffffdee c7a28000 00000000 9e80: c7a29f3c c7a29e90 c00a1908 c0078fa4 00000000 00000000 c014e0ec c0035050 9ea0: 00000000 00000001 ffffffff c7a79b60 00000000 00000000 00000000 00000000 9ec0: c7850c20 c005c3c4 00000000 00000000 00000000 00000000 00000007 40053000 9ee0: 00000008 c7a29fb0 00000008 beadb378 c7a29fac c7a29f00 c002420c c002f114 9f00: c00242b0 c002f114 c7a29f2c c7a29f18 40053000 00000008 c7a07898 00000008 9f20: c7a79b60 40053000 c7a29f70 00000008 c7a29f6c c7a29f40 c00a205c c00a186c 9f40: c7a28000 40053000 00001000 c7a79b60 40053000 00000000 00000000 00000008 9f60: c7a29fa4 c7a29f70 c00a22e0 c00a1fac 00000000 00000000 00000022 00000000 9f80: ffffffff 00000008 000233d8 40053000 00000004 c0029c24 00000000 c7a29fa8 9fa0: c0029aa0 c00a22a8 00000008 000233d8 0000000a 40053000 00000008 00000000 9fc0: 00000008 000233d8 40053000 00000004 00000008 00022344 000c42e8 00000001 9fe0: 00000000 beada6e8 4017ae0c 401ce21c 60000010 0000000a 00000000 00000000 Backtrace: [] (__bug+0x0/0x30) from [] (iov_iter_copy_from_user_atomic+0x44/0xdc) [] (iov_iter_copy_from_user_atomic+0x0/0xdc) from [] (generic_perform_write+0xe8/0x1c4) r7:c02530e0 r6:00000008 r5:c7a787a0 r4:c7a29d78 [] (generic_perform_write+0x0/0x1c4) from [] (generic_file_buffered_write+0x5c/0x88) [] (generic_file_buffered_write+0x0/0x88) from [] (__generic_file_aio_write+0x468/0x4b4) r8:00000008 r7:c7a786f0 r6:c7a79b60 r5:00000000 r4:00000000 [] (__generic_file_aio_write+0x0/0x4b4) from [] (generic_file_aio_write+0x78/0xe8) [] (generic_file_aio_write+0x0/0xe8) from [] (do_sync_write+0xa8/0xe4) [] (do_sync_write+0x0/0xe4) from [] (vfs_write+0xbc/0x148) r8:00000008 r7:c7a29f70 r6:40053000 r5:c7a79b60 r4:00000008 [] (vfs_write+0x0/0x148) from [] (sys_write+0x44/0x70) r8:00000008 r7:00000000 r6:00000000 r5:40053000 r4:c7a79b60 [] (sys_write+0x0/0x70) from [] (ret_fast_syscall+0x0/0x30) r8:c0029c24 r7:00000004 r6:40053000 r5:000233d8 r4:00000008 Code: e59f0010 e1a01003 eb087532 e3a03000 (e5833000) ---[ end trace c74a48935f104e27 ]--- note: udevd[215] exited with preempt_count 1 BUG: scheduling while atomic: udevd/215/0x40000002 Modules linked in: Backtrace: [] (dump_backtrace+0x0/0x110) from [] (dump_stack+0x18/0x1c) r6:c7a28000 r5:c0306b38 r4:00000000 r3:20000113 [] (dump_stack+0x0/0x1c) from [] (__schedule_bug+0x58/0x64) [] (__schedule_bug+0x0/0x64) from [] (__schedule+0x60/0x2f0) r4:c7850c20 r3:00000000 [] (__schedule+0x0/0x2f0) from [] (__cond_resched+0x24/0x3c) [] (__cond_resched+0x0/0x3c) from [] (_cond_resched+0x38/0x48) r4:c7a29abc r3:00000001 [] (_cond_resched+0x0/0x48) from [] (unmap_page_range+0x1c4/0x1dc) [] (unmap_page_range+0x0/0x1dc) from [] (unmap_vmas+0x80/0xb0) [] (unmap_vmas+0x0/0xb0) from [] (exit_mmap+0x12c/0x290) [] (exit_mmap+0x0/0x290) from [] (mmput+0x3c/0xec) r7:c7a07894 r6:00000000 r5:00000000 r4:c7a07860 [] (mmput+0x0/0xec) from [] (exit_mm+0x150/0x160) r5:c7850c20 r4:c7a07860 [] (exit_mm+0x0/0x160) from [] (do_exit+0x1f8/0x2d8) r7:00000817 r6:00000001 r5:0000000b r4:c7850c20 [] (do_exit+0x0/0x2d8) from [] (die+0x114/0x128) [] (die+0x0/0x128) from [] (__do_kernel_fault+0x6c/0x8c) r7:c7a29ca0 r6:c7a07860 r5:00000817 r4:00000000 [] (__do_kernel_fault+0x0/0x8c) from [] (do_page_fault+0x134/0x14c) r8:00000000 r7:c03050cc r6:c7850c20 r5:c7a07860 r4:c7a29ca0 r3:c7a29ca0 [] (do_page_fault+0x0/0x14c) from [] (do_DataAbort+0x38/0xa0) [] (do_DataAbort+0x0/0xa0) from [] (__dabt_svc+0x4c/0x80) Exception stack(0xc7a29ca0 to 0xc7a29ce8) 9ca0: 00000027 00000000 00000002 00000000 c7a29d78 c0334540 00000008 00000000 9cc0: 00000000 00000000 c7a79b60 c7a29cf4 c7a29c30 c7a29ce8 c003e2e8 c002cbf0 9ce0: 60000013 ffffffff r8:00000000 r7:00000000 r6:00000008 r5:c7a29cd4 r4:ffffffff [] (__bug+0x0/0x30) from [] (iov_iter_copy_from_user_atomic+0x44/0xdc) [] (iov_iter_copy_from_user_atomic+0x0/0xdc) from [] (generic_perform_write+0xe8/0x1c4) r7:c02530e0 r6:00000008 r5:c7a787a0 r4:c7a29d78 [] (generic_perform_write+0x0/0x1c4) from [] (generic_file_buffered_write+0x5c/0x88) [] (generic_file_buffered_write+0x0/0x88) from [] (__generic_file_aio_write+0x468/0x4b4) r8:00000008 r7:c7a786f0 r6:c7a79b60 r5:00000000 r4:00000000 [] (__generic_file_aio_write+0x0/0x4b4) from [] (generic_file_aio_write+0x78/0xe8) [] (generic_file_aio_write+0x0/0xe8) from [] (do_sync_write+0xa8/0xe4) [] (do_sync_write+0x0/0xe4) from [] (vfs_write+0xbc/0x148) r8:00000008 r7:c7a29f70 r6:40053000 r5:c7a79b60 r4:00000008 [] (vfs_write+0x0/0x148) from [] (sys_write+0x44/0x70) r8:00000008 r7:00000000 r6:00000000 r5:40053000 r4:c7a79b60 [] (sys_write+0x0/0x70) from [] (ret_fast_syscall+0x0/0x30) r8:c0029c24 r7:00000004 r6:40053000 r5:000233d8 r4:00000008 BUG: scheduling while atomic: udevd/215/0x40000002 Modules linked in: nand_ids nand_ecc Backtrace: [] (dump_backtrace+0x0/0x110) from [] (dump_stack+0x18/0x1c) r6:c7a28000 r5:c0306b38 r4:00000000 r3:20000013 [] (dump_stack+0x0/0x1c) from [] (__schedule_bug+0x58/0x64) [] (__schedule_bug+0x0/0x64) from [] (__schedule+0x60/0x2f0) r4:c7850c20 r3:00000000 [] (__schedule+0x0/0x2f0) from [] (__cond_resched+0x24/0x3c) [] (__cond_resched+0x0/0x3c) from [] (_cond_resched+0x38/0x48) r4:c7818d40 r3:00000001 [] (_cond_resched+0x0/0x48) from [] (put_files_struct+0x94/0xec) [] (put_files_struct+0x0/0xec) from [] (exit_files+0x58/0x5c) [] (exit_files+0x0/0x5c) from [] (do_exit+0x208/0x2d8) r5:0000000b r4:c7850c20 [] (do_exit+0x0/0x2d8) from [] (die+0x114/0x128) [] (die+0x0/0x128) from [] (__do_kernel_fault+0x6c/0x8c) r7:c7a29ca0 r6:c7a07860 r5:00000817 r4:00000000 [] (__do_kernel_fault+0x0/0x8c) from [] (do_page_fault+0x134/0x14c) r8:00000000 r7:c03050cc r6:c7850c20 r5:c7a07860 r4:c7a29ca0 r3:c7a29ca0 [] (do_page_fault+0x0/0x14c) from [] (do_DataAbort+0x38/0xa0) [] (do_DataAbort+0x0/0xa0) from [] (__dabt_svc+0x4c/0x80) Exception stack(0xc7a29ca0 to 0xc7a29ce8) 9ca0: 00000027 00000000 00000002 00000000 c7a29d78 c0334540 00000008 00000000 9cc0: 00000000 00000000 c7a79b60 c7a29cf4 c7a29c30 c7a29ce8 c003e2e8 c002cbf0 9ce0: 60000013 ffffffff r8:00000000 r7:00000000 r6:00000008 r5:c7a29cd4 r4:ffffffff [] (__bug+0x0/0x30) from [] (iov_iter_copy_from_user_atomic+0x44/0xdc) [] (iov_iter_copy_from_user_atomic+0x0/0xdc) from [] (generic_perform_write+0xe8/0x1c4) r7:c02530e0 r6:00000008 r5:c7a787a0 r4:c7a29d78 [] (generic_perform_write+0x0/0x1c4) from [] (generic_file_buffered_write+0x5c/0x88) [] (generic_file_buffered_write+0x0/0x88) from [] (__generic_file_aio_write+0x468/0x4b4) r8:00000008 r7:c7a786f0 r6:c7a79b60 r5:00000000 r4:00000000 [] (__generic_file_aio_write+0x0/0x4b4) from [] (generic_file_aio_write+0x78/0xe8) [] (generic_file_aio_write+0x0/0xe8) from [] (do_sync_write+0xa8/0xe4) [] (do_sync_write+0x0/0xe4) from [] (vfs_write+0xbc/0x148) r8:00000008 r7:c7a29f70 r6:40053000 r5:c7a79b60 r4:00000008 [] (vfs_write+0x0/0x148) from [] (sys_write+0x44/0x70) r8:00000008 r7:00000000 r6:00000000 r5:40053000 r4:c7a79b60 [] (sys_write+0x0/0x70) from [] (ret_fast_syscall+0x0/0x30) r8:c0029c24 r7:00000004 r6:40053000 r5:000233d8 r4:00000008 NAND device: Manufacturer ID: 0xec, Chip ID: 0xd3 (Samsung NAND 1GiB 3,3V 8-bit) Scanning device for bad blocks tim login: kernel BUG at mm/filemap.c:2043! Unable to handle kernel NULL pointer dereference at virtual address 00000000 pgd = c7ab8000 [00000000] *pgd=87a9c831, *pte=00000000, *ppte=00000000 Internal error: Oops: 817 [#2] PREEMPT Modules linked in: mxc_nand(+) nand nand_ids nand_ecc CPU: 0 Tainted: G D (3.0.1-rt8 #1) PC is at __bug+0x24/0x30 LR is at vprintk+0x3b4/0x404 pc : [] lr : [] psr: 20000013 sp : c7a97ce8 ip : c7a97c30 fp : c7a97cf4 r10: c7a44420 r9 : 00000000 r8 : 00000000 r7 : 00000000 r6 : 00000041 r5 : c0335040 r4 : c7a97d78 r3 : 00000000 r2 : 00000002 r1 : 00000001 r0 : 00000027 Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 00c5387d Table: 87ab8008 DAC: 00000015 Process syslogd (pid: 225, stack limit = 0xc7a96268) Stack: (0xc7a97ce8 to 0xc7a98000) 7ce0: c7a97d14 c7a97cf8 c0076a98 c002cbd8 c7a97d78 c7a78490 7d00: 00000041 c02530e0 c7a97d74 c7a97d18 c0076c18 c0076a60 00000041 00000000 7d20: c7a97d44 c7a97d40 c7a96000 00000000 00001000 00000000 00000000 00000000 7d40: c7a97d74 c0335040 c0041ccc 00000000 00000000 00000000 c7a44420 c7a97d78 7d60: 00000000 00000000 c7a97dac c7a97d78 c0076d50 c0076b3c c7a97f10 00000001 7d80: 00000000 00000041 00000000 00000000 00000000 c7a44420 c7a783e0 00000041 7da0: c7a97e3c c7a97db0 c0078f4c c0076d00 00000000 00000000 c7a97ed0 00000041 7dc0: 00000000 c0057490 ffffffff c7a96000 c7a97e2c c7a97de0 c7a78490 c7a97ed0 7de0: c7a97f10 c7a97e98 00000000 40214000 00000000 00000001 40214000 c04291c0 7e00: c7a97e2c c7a08758 000000b7 00000041 c7ab9008 00000000 c7a44420 c7a783fc 7e20: 00000000 c7a97e98 c7a97f10 00000001 c7a97e8c c7a97e40 c0079010 c0078af0 7e40: c002cbb0 c002b5f0 91827364 c7a97e4c c7a97e4c c7a97e54 c7a97e54 00000000 7e60: c002b650 c7a44420 c7a97e98 c7a97f70 c7a97f10 fffffdee c7a96000 00000000 7e80: c7a97f3c c7a97e90 c00a1908 c0078fa4 00000000 00000000 c7a97ebc c7a97ea8 7ea0: 00000000 00000001 ffffffff c7a44420 00000000 00000000 00000000 00000000 7ec0: c7896cc0 c7a97ed0 00000000 00000000 00000000 00000000 00000000 00000007 7ee0: 00000041 40214200 00000041 00000041 00000000 0006c6f0 c7a97fac c7a97f08 7f00: c00242b0 c002f114 00000004 24f47302 0006c458 00000041 00000079 00000041 7f20: c7a44420 0006c458 c7a97f70 00000041 c7a97f6c c7a97f40 c00a205c c00a186c 7f40: 00000079 00000000 00000010 c7a44420 0006c458 00000000 00000000 00000041 7f60: c7a97fa4 c7a97f70 c00a22e0 c00a1fac 00000000 00000000 00000004 00000000 7f80: 00001000 0006b89c 00000041 0006c458 00000004 c0029c24 00000000 c7a97fa8 7fa0: c0029aa0 c00a22a8 0006b89c 00000041 00000004 0006c458 00000041 00032000 7fc0: 0006b89c 00000041 0006c458 00000004 00000041 00000000 0006c6f0 befc1bdc 7fe0: 00000004 befc1b30 0000faa4 4021421c 60000010 00000004 00000000 00000000 Backtrace: [] (__bug+0x0/0x30) from [] (iov_iter_copy_from_user_atomic+0x44/0xdc) [] (iov_iter_copy_from_user_atomic+0x0/0xdc) from [] (generic_perform_write+0xe8/0x1c4) r7:c02530e0 r6:00000041 r5:c7a78490 r4:c7a97d78 [] (generic_perform_write+0x0/0x1c4) from [] (generic_file_buffered_write+0x5c/0x88) [] (generic_file_buffered_write+0x0/0x88) from [] (__generic_file_aio_write+0x468/0x4b4) r8:00000041 r7:c7a783e0 r6:c7a44420 r5:00000000 r4:00000000 [] (__generic_file_aio_write+0x0/0x4b4) from [] (generic_file_aio_write+0x78/0xe8) [] (generic_file_aio_write+0x0/0xe8) from [] (do_sync_write+0xa8/0xe4) [] (do_sync_write+0x0/0xe4) from [] (vfs_write+0xbc/0x148) r8:00000041 r7:c7a97f70 r6:0006c458 r5:c7a44420 r4:00000041 [] (vfs_write+0x0/0x148) from [] (sys_write+0x44/0x70) r8:00000041 r7:00000000 r6:00000000 r5:0006c458 r4:c7a44420 [] (sys_write+0x0/0x70) from [] (ret_fast_syscall+0x0/0x30) r8:c0029c24 r7:00000004 r6:0006c458 r5:00000041 r4:0006b89c Code: e59f0010 e1a01003 eb087532 e3a03000 (e5833000) ---[ end trace c74a48935f104e28 ]--- note: syslogd[225] exited with preempt_count 1 BUG: scheduling while atomic: syslogd/225/0x40000002 Modules linked in: mxc_nand(+) nand nand_ids nand_ecc Backtrace: [] (dump_backtrace+0x0/0x110) from [] (dump_stack+0x18/0x1c) r6:c7a96000 r5:c0306b38 r4:00000000 r3:20000113 [] (dump_stack+0x0/0x1c) from [] (__schedule_bug+0x58/0x64) [] (__schedule_bug+0x0/0x64) from [] (__schedule+0x60/0x2f0) r4:c7896cc0 r3:00000000 [] (__schedule+0x0/0x2f0) from [] (__cond_resched+0x24/0x3c) [] (__cond_resched+0x0/0x3c) from [] (_cond_resched+0x38/0x48) r4:c7a97abc r3:00000001 [] (_cond_resched+0x0/0x48) from [] (unmap_page_range+0x1c4/0x1dc) [] (unmap_page_range+0x0/0x1dc) from [] (unmap_vmas+0x80/0xb0) [] (unmap_vmas+0x0/0xb0) from [] (exit_mmap+0x12c/0x290) [] (exit_mmap+0x0/0x290) from [] (mmput+0x3c/0xec) r7:c7a95bf4 r6:00000000 r5:00000000 r4:c7a95bc0 [] (mmput+0x0/0xec) from [] (exit_mm+0x150/0x160) r5:c7896cc0 r4:c7a95bc0 [] (exit_mm+0x0/0x160) from [] (do_exit+0x1f8/0x2d8) r7:00000817 r6:00000001 r5:0000000b r4:c7896cc0 [] (do_exit+0x0/0x2d8) from [] (die+0x114/0x128) [] (die+0x0/0x128) from [] (__do_kernel_fault+0x6c/0x8c) r7:c7a97ca0 r6:c7a95bc0 r5:00000817 r4:00000000 [] (__do_kernel_fault+0x0/0x8c) from [] (do_page_fault+0x134/0x14c) r8:00000000 r7:c03050cc r6:c7896cc0 r5:c7a95bc0 r4:c7a97ca0 r3:c7a97ca0 [] (do_page_fault+0x0/0x14c) from [] (do_DataAbort+0x38/0xa0) [] (do_DataAbort+0x0/0xa0) from [] (__dabt_svc+0x4c/0x80) Exception stack(0xc7a97ca0 to 0xc7a97ce8) 7ca0: 00000027 00000001 00000002 00000000 c7a97d78 c0335040 00000041 00000000 7cc0: 00000000 00000000 c7a44420 c7a97cf4 c7a97c30 c7a97ce8 c003e304 c002cbf0 7ce0: 20000013 ffffffff r8:00000000 r7:00000000 r6:00000041 r5:c7a97cd4 r4:ffffffff [] (__bug+0x0/0x30) from [] (iov_iter_copy_from_user_atomic+0x44/0xdc) [] (iov_iter_copy_from_user_atomic+0x0/0xdc) from [] (generic_perform_write+0xe8/0x1c4) r7:c02530e0 r6:00000041 r5:c7a78490 r4:c7a97d78 [] (generic_perform_write+0x0/0x1c4) from [] (generic_file_buffered_write+0x5c/0x88) [] (generic_file_buffered_write+0x0/0x88) from [] (__generic_file_aio_write+0x468/0x4b4) r8:00000041 r7:c7a783e0 r6:c7a44420 r5:00000000 r4:00000000 [] (__generic_file_aio_write+0x0/0x4b4) from [] (generic_file_aio_write+0x78/0xe8) [] (generic_file_aio_write+0x0/0xe8) from [] (do_sync_write+0xa8/0xe4) [] (do_sync_write+0x0/0xe4) from [] (vfs_write+0xbc/0x148) r8:00000041 r7:c7a97f70 r6:0006c458 r5:c7a44420 r4:00000041 [] (vfs_write+0x0/0x148) from [] (sys_write+0x44/0x70) r8:00000041 r7:00000000 r6:00000000 r5:0006c458 r4:c7a44420 [] (sys_write+0x0/0x70) from [] (ret_fast_syscall+0x0/0x30) r8:c0029c24 r7:00000004 r6:0006c458 r5:00000041 r4:0006b89c BUG: scheduling while atomic: syslogd/225/0x40000002 Modules linked in: mxc_nand(+) nand nand_ids nand_ecc Backtrace: [] (dump_backtrace+0x0/0x110) from [] (dump_stack+0x18/0x1c) r6:c7a96000 r5:c0306b38 r4:00000000 r3:20000113 [] (dump_stack+0x0/0x1c) from [] (__schedule_bug+0x58/0x64) [] (__schedule_bug+0x0/0x64) from [] (__schedule+0x60/0x2f0) r4:c7896cc0 r3:00000000 [] (__schedule+0x0/0x2f0) from [] (__cond_resched+0x24/0x3c) [] (__cond_resched+0x0/0x3c) from [] (_cond_resched+0x38/0x48) r4:c7a97abc r3:00000001 [] (_cond_resched+0x0/0x48) from [] (unmap_page_range+0x1c4/0x1dc) [] (unmap_page_range+0x0/0x1dc) from [] (unmap_vmas+0x80/0xb0) [] (unmap_vmas+0x0/0xb0) from [] (exit_mmap+0x12c/0x290) [] (exit_mmap+0x0/0x290) from [] (mmput+0x3c/0xec) r7:c7a95bf4 r6:00000000 r5:00000000 r4:c7a95bc0 [] (mmput+0x0/0xec) from [] (exit_mm+0x150/0x160) r5:c7896cc0 r4:c7a95bc0 [] (exit_mm+0x0/0x160) from [] (do_exit+0x1f8/0x2d8) r7:00000817 r6:00000001 r5:0000000b r4:c7896cc0 [] (do_exit+0x0/0x2d8) from [] (die+0x114/0x128) [] (die+0x0/0x128) from [] (__do_kernel_fault+0x6c/0x8c) r7:c7a97ca0 r6:c7a95bc0 r5:00000817 r4:00000000 [] (__do_kernel_fault+0x0/0x8c) from [] (do_page_fault+0x134/0x14c) r8:00000000 r7:c03050cc r6:c7896cc0 r5:c7a95bc0 r4:c7a97ca0 r3:c7a97ca0 [] (do_page_fault+0x0/0x14c) from [] (do_DataAbort+0x38/0xa0) [] (do_DataAbort+0x0/0xa0) from [] (__dabt_svc+0x4c/0x80) Exception stack(0xc7a97ca0 to 0xc7a97ce8) 7ca0: 00000027 00000001 00000002 00000000 c7a97d78 c0335040 00000041 00000000 7cc0: 00000000 00000000 c7a44420 c7a97cf4 c7a97c30 c7a97ce8 c003e304 c002cbf0 7ce0: 20000013 ffffffff r8:00000000 r7:00000000 r6:00000041 r5:c7a97cd4 r4:ffffffff [] (__bug+0x0/0x30) from [] (iov_iter_copy_from_user_atomic+0x44/0xdc) [] (iov_iter_copy_from_user_atomic+0x0/0xdc) from [] (generic_perform_write+0xe8/0x1c4) r7:c02530e0 r6:00000041 r5:c7a78490 r4:c7a97d78 [] (generic_perform_write+0x0/0x1c4) from [] (generic_file_buffered_write+0x5c/0x88) [] (generic_file_buffered_write+0x0/0x88) from [] (__generic_file_aio_write+0x468/0x4b4) r8:00000041 r7:c7a783e0 r6:c7a44420 r5:00000000 r4:00000000 [] (__generic_file_aio_write+0x0/0x4b4) from [] (generic_file_aio_write+0x78/0xe8) [] (generic_file_aio_write+0x0/0xe8) from [] (do_sync_write+0xa8/0xe4) [] (do_sync_write+0x0/0xe4) from [] (vfs_write+0xbc/0x148) r8:00000041 r7:c7a97f70 r6:0006c458 r5:c7a44420 r4:00000041 [] (vfs_write+0x0/0x148) from [] (sys_write+0x44/0x70) r8:00000041 r7:00000000 r6:00000000 r5:0006c458 r4:c7a44420 [] (sys_write+0x0/0x70) from [] (ret_fast_syscall+0x0/0x30) r8:c0029c24 r7:00000004 r6:0006c458 r5:00000041 r4:0006b89c BUG: scheduling while atomic: syslogd/225/0x40000002 Modules linked in: mxc_nand(+) nand nand_ids nand_ecc Backtrace: [] (dump_backtrace+0x0/0x110) from [] (dump_stack+0x18/0x1c) r6:c7a96000 r5:c0306b38 r4:00000000 r3:20000113 [] (dump_stack+0x0/0x1c) from [] (__schedule_bug+0x58/0x64) [] (__schedule_bug+0x0/0x64) from [] (__schedule+0x60/0x2f0) r4:c7896cc0 r3:00000000 [] (__schedule+0x0/0x2f0) from [] (__cond_resched+0x24/0x3c) [] (__cond_resched+0x0/0x3c) from [] (_cond_resched+0x38/0x48) r4:c7a97abc r3:00000001 [] (_cond_resched+0x0/0x48) from [] (unmap_page_range+0x1c4/0x1dc) [] (unmap_page_range+0x0/0x1dc) from [] (unmap_vmas+0x80/0xb0) [] (unmap_vmas+0x0/0xb0) from [] (exit_mmap+0x12c/0x290) [] (exit_mmap+0x0/0x290) from [] (mmput+0x3c/0xec) r7:c7a95bf4 r6:00000000 r5:00000000 r4:c7a95bc0 [] (mmput+0x0/0xec) from [] (exit_mm+0x150/0x160) r5:c7896cc0 r4:c7a95bc0 [] (exit_mm+0x0/0x160) from [] (do_exit+0x1f8/0x2d8) r7:00000817 r6:00000001 r5:0000000b r4:c7896cc0 [] (do_exit+0x0/0x2d8) from [] (die+0x114/0x128) [] (die+0x0/0x128) from [] (__do_kernel_fault+0x6c/0x8c) r7:c7a97ca0 r6:c7a95bc0 r5:00000817 r4:00000000 [] (__do_kernel_fault+0x0/0x8c) from [] (do_page_fault+0x134/0x14c) r8:00000000 r7:c03050cc r6:c7896cc0 r5:c7a95bc0 r4:c7a97ca0 r3:c7a97ca0 [] (do_page_fault+0x0/0x14c) from [] (do_DataAbort+0x38/0xa0) [] (do_DataAbort+0x0/0xa0) from [] (__dabt_svc+0x4c/0x80) Exception stack(0xc7a97ca0 to 0xc7a97ce8) 7ca0: 00000027 00000001 00000002 00000000 c7a97d78 c0335040 00000041 00000000 7cc0: 00000000 00000000 c7a44420 c7a97cf4 c7a97c30 c7a97ce8 c003e304 c002cbf0 7ce0: 20000013 ffffffff r8:00000000 r7:00000000 r6:00000041 r5:c7a97cd4 r4:ffffffff [] (__bug+0x0/0x30) from [] (iov_iter_copy_from_user_atomic+0x44/0xdc) [] (iov_iter_copy_from_user_atomic+0x0/0xdc) from [] (generic_perform_write+0xe8/0x1c4) r7:c02530e0 r6:00000041 r5:c7a78490 r4:c7a97d78 [] (generic_perform_write+0x0/0x1c4) from [] (generic_file_buffered_write+0x5c/0x88) [] (generic_file_buffered_write+0x0/0x88) from [] (__generic_file_aio_write+0x468/0x4b4) r8:00000041 r7:c7a783e0 r6:c7a44420 r5:00000000 r4:00000000 [] (__generic_file_aio_write+0x0/0x4b4) from [] (generic_file_aio_write+0x78/0xe8) [] (generic_file_aio_write+0x0/0xe8) from [] (do_sync_write+0xa8/0xe4) [] (do_sync_write+0x0/0xe4) from [] (vfs_write+0xbc/0x148) r8:00000041 r7:c7a97f70 r6:0006c458 r5:c7a44420 r4:00000041 [] (vfs_write+0x0/0x148) from [] (sys_write+0x44/0x70) r8:00000041 r7:00000000 r6:00000000 r5:0006c458 r4:c7a44420 [] (sys_write+0x0/0x70) from [] (ret_fast_syscall+0x0/0x30) r8:c0029c24 r7:00000004 r6:0006c458 r5:00000041 r4:0006b89c sched: RT throttling activated BUG: scheduling while atomic: syslogd/225/0x40000002 Modules linked in: mxc_nand(+) nand nand_ids nand_ecc Backtrace: [] (dump_backtrace+0x0/0x110) from [] (dump_stack+0x18/0x1c) r6:c7a96000 r5:c0306b38 r4:00000000 r3:20000113 [] (dump_stack+0x0/0x1c) from [] (__schedule_bug+0x58/0x64) [] (__schedule_bug+0x0/0x64) from [] (__schedule+0x60/0x2f0) r4:c7896cc0 r3:00000000 [] (__schedule+0x0/0x2f0) from [] (__cond_resched+0x24/0x3c) [] (__cond_resched+0x0/0x3c) from [] (_cond_resched+0x38/0x48) r4:c7818500 r3:00000001 [] (_cond_resched+0x0/0x48) from [] (put_files_struct+0x94/0xec) [] (put_files_struct+0x0/0xec) from [] (exit_files+0x58/0x5c) [] (exit_files+0x0/0x5c) from [] (do_exit+0x208/0x2d8) r5:0000000b r4:c7896cc0 [] (do_exit+0x0/0x2d8) from [] (die+0x114/0x128) [] (die+0x0/0x128) from [] (__do_kernel_fault+0x6c/0x8c) r7:c7a97ca0 r6:c7a95bc0 r5:00000817 r4:00000000 [] (__do_kernel_fault+0x0/0x8c) from [] (do_page_fault+0x134/0x14c) r8:00000000 r7:c03050cc r6:c7896cc0 r5:c7a95bc0 r4:c7a97ca0 r3:c7a97ca0 [] (do_page_fault+0x0/0x14c) from [] (do_DataAbort+0x38/0xa0) [] (do_DataAbort+0x0/0xa0) from [] (__dabt_svc+0x4c/0x80) Exception stack(0xc7a97ca0 to 0xc7a97ce8) 7ca0: 00000027 00000001 00000002 00000000 c7a97d78 c0335040 00000041 00000000 7cc0: 00000000 00000000 c7a44420 c7a97cf4 c7a97c30 c7a97ce8 c003e304 c002cbf0 7ce0: 20000013 ffffffff r8:00000000 r7:00000000 r6:00000041 r5:c7a97cd4 r4:ffffffff [] (__bug+0x0/0x30) from [] (iov_iter_copy_from_user_atomic+0x44/0xdc) [] (iov_iter_copy_from_user_atomic+0x0/0xdc) from [] (generic_perform_write+0xe8/0x1c4) r7:c02530e0 r6:00000041 r5:c7a78490 r4:c7a97d78 [] (generic_perform_write+0x0/0x1c4) from [] (generic_file_buffered_write+0x5c/0x88) [] (generic_file_buffered_write+0x0/0x88) from [] (__generic_file_aio_write+0x468/0x4b4) r8:00000041 r7:c7a783e0 r6:c7a44420 r5:00000000 r4:00000000 [] (__generic_file_aio_write+0x0/0x4b4) from [] (generic_file_aio_write+0x78/0xe8) [] (generic_file_aio_write+0x0/0xe8) from [] (do_sync_write+0xa8/0xe4) [] (do_sync_write+0x0/0xe4) from [] (vfs_write+0xbc/0x148) r8:00000041 r7:c7a97f70 r6:0006c458 r5:c7a44420 r4:00000041 [] (vfs_write+0x0/0x148) from [] (sys_write+0x44/0x70) r8:00000041 r7:00000000 r6:00000000 r5:0006c458 r4:c7a44420 [] (sys_write+0x0/0x70) from [] (ret_fast_syscall+0x0/0x30) r8:c0029c24 r7:00000004 r6:0006c458 r5:00000041 r4:0006b89c kernel BUG at mm/filemap.c:2043! Unable to handle kernel NULL pointer dereference at virtual address 00000000 pgd = c7a68000 [00000000] *pgd=87a27831, *pte=00000000, *ppte=00000000 Internal error: Oops: 817 [#3] PREEMPT Modules linked in: mxc_nand(+) nand nand_ids nand_ecc CPU: 0 Tainted: G D (3.0.1-rt8 #1) PC is at __bug+0x24/0x30 LR is at vprintk+0x398/0x404 pc : [] lr : [] psr: 60000013 sp : c7a7fce8 ip : c7a7fc30 fp : c7a7fcf4 r10: c7a44e20 r9 : 00000000 r8 : 00000000 r7 : 00000000 r6 : 00000006 r5 : c0333de0 r4 : c7a7fd78 r3 : 00000000 r2 : 00000002 r1 : 00000002 r0 : 00000027 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 00c5387d Table: 87a68008 DAC: 00000015 Process ifup (pid: 221, stack limit = 0xc7a7e268) Stack: (0xc7a7fce8 to 0xc7a80000) fce0: c7a7fd14 c7a7fcf8 c0076a98 c002cbd8 c7a7fd78 c7a78308 fd00: 00000006 c02530e0 c7a7fd74 c7a7fd18 c0076c18 c0076a60 00000006 00000000 fd20: c7a7fd44 c7a7fd40 c7a7e000 00000000 00001000 00000000 00000000 00000000 fd40: c7a7fd74 c0333de0 c0041ccc 00000000 00000000 00000000 c7a44e20 c7a7fd78 fd60: 00000000 00000000 c7a7fdac c7a7fd78 c0076d50 c0076b3c c7a7ff10 00000001 fd80: 00000000 00000006 00000000 00000000 00000000 c7a44e20 c7a78258 00000006 fda0: c7a7fe3c c7a7fdb0 c0078f4c c0076d00 00000000 00000000 c7a7fed0 00000006 fdc0: 00000000 c0035100 c7a7fdec c7a7fdd8 c0035100 c002b620 c7a78308 c7a7fed0 fde0: c7a7ff10 c7a7fe98 c008ecec c0035050 00000000 00000001 c7a7fe24 c7a6dbd0 fe00: 400c9000 00000000 c7a69000 00000006 c7a07ba0 00000000 c7a44e20 c7a78274 fe20: 00000000 c7a7fe98 c7a7ff10 00000001 c7a7fe8c c7a7fe40 c0079010 c0078af0 fe40: c002b614 00000001 91827364 c7a7fe4c c7a7fe4c c7a7fe54 c7a7fe54 00000000 fe60: c7a7feb4 c7a44e20 c7a7fe98 c7a7ff70 c7a7ff10 fffffdee c7a7e000 00000000 fe80: c7a7ff3c c7a7fe90 c00a1908 c0078fa4 00000000 00000000 c014e0ec c0035050 fea0: 00000000 00000001 ffffffff c7a44e20 00000000 00000000 00000000 00000000 fec0: c7899720 c005c3c4 00000000 00000000 00000000 00000000 00000007 400c9000 fee0: 00000006 c7a7ffb0 00000006 0006c0d8 c7a7ffac c7a7ff00 c002420c c002f114 ff00: c00242b0 c002f114 c7a7ff2c c7a7ff18 400c9000 00000006 c7a07bd8 00000006 ff20: c7a44e20 400c9000 c7a7ff70 00000006 c7a7ff6c c7a7ff40 c00a205c c00a186c ff40: c7a7e000 400c9000 00001000 c7a44e20 400c9000 00000000 00000000 00000006 ff60: c7a7ffa4 c7a7ff70 c00a22e0 c00a1fac 00000000 00000000 00000022 00000000 ff80: ffffffff 00000006 0006c4c8 400c9000 00000004 c0029c24 00000000 c7a7ffa8 ffa0: c0029aa0 c00a22a8 00000006 0006c4c8 00000003 400c9000 00000006 00000000 ffc0: 00000006 0006c4c8 400c9000 00000004 00000006 00000000 000c42e8 00000001 ffe0: 00000000 beeb2c10 4019fe0c 401f321c 60000010 00000003 00000000 00000000 Backtrace: [] (__bug+0x0/0x30) from [] (iov_iter_copy_from_user_atomic+0x44/0xdc) [] (iov_iter_copy_from_user_atomic+0x0/0xdc) from [] (generic_perform_write+0xe8/0x1c4) r7:c02530e0 r6:00000006 r5:c7a78308 r4:c7a7fd78 [] (generic_perform_write+0x0/0x1c4) from [] (generic_file_buffered_write+0x5c/0x88) [] (generic_file_buffered_write+0x0/0x88) from [] (__generic_file_aio_write+0x468/0x4b4) r8:00000006 r7:c7a78258 r6:c7a44e20 r5:00000000 r4:00000000 [] (__generic_file_aio_write+0x0/0x4b4) from [] (generic_file_aio_write+0x78/0xe8) [] (generic_file_aio_write+0x0/0xe8) from [] (do_sync_write+0xa8/0xe4) [] (do_sync_write+0x0/0xe4) from [] (vfs_write+0xbc/0x148) r8:00000006 r7:c7a7ff70 r6:400c9000 r5:c7a44e20 r4:00000006 [] (vfs_write+0x0/0x148) from [] (sys_write+0x44/0x70) r8:00000006 r7:00000000 r6:00000000 r5:400c9000 r4:c7a44e20 [] (sys_write+0x0/0x70) from [] (ret_fast_syscall+0x0/0x30) r8:c0029c24 r7:00000004 r6:400c9000 r5:0006c4c8 r4:00000006 Code: e59f0010 e1a01003 eb087532 e3a03000 (e5833000) ---[ end trace c74a48935f104e29 ]--- note: ifup[221] exited with preempt_count 1 BUG: scheduling while atomic: ifup/221/0x40000002 Modules linked in: mxc_nand(+) nand nand_ids nand_ecc Backtrace: [] (dump_backtrace+0x0/0x110) from [] (dump_stack+0x18/0x1c) r6:c7a7e000 r5:c0306b38 r4:00000000 r3:20000113 [] (dump_stack+0x0/0x1c) from [] (__schedule_bug+0x58/0x64) [] (__schedule_bug+0x0/0x64) from [] (__schedule+0x60/0x2f0) r4:c7899720 r3:00000000 [] (__schedule+0x0/0x2f0) from [] (__cond_resched+0x24/0x3c) [] (__cond_resched+0x0/0x3c) from [] (_cond_resched+0x38/0x48) r4:c7a7fabc r3:00000001 [] (_cond_resched+0x0/0x48) from [] (unmap_page_range+0x1c4/0x1dc) [] (unmap_page_range+0x0/0x1dc) from [] (unmap_vmas+0x80/0xb0) [] (unmap_vmas+0x0/0xb0) from [] (exit_mmap+0x12c/0x290) [] (exit_mmap+0x0/0x290) from [] (mmput+0x3c/0xec) r7:c7a07bd4 r6:00000000 r5:00000000 r4:c7a07ba0 [] (mmput+0x0/0xec) from [] (exit_mm+0x150/0x160) r5:c7899720 r4:c7a07ba0 [] (exit_mm+0x0/0x160) from [] (do_exit+0x1f8/0x2d8) r7:00000817 r6:00000001 r5:0000000b r4:c7899720 [] (do_exit+0x0/0x2d8) from [] (die+0x114/0x128) [] (die+0x0/0x128) from [] (__do_kernel_fault+0x6c/0x8c) r7:c7a7fca0 r6:c7a07ba0 r5:00000817 r4:00000000 [] (__do_kernel_fault+0x0/0x8c) from [] (do_page_fault+0x134/0x14c) r8:00000000 r7:c03050cc r6:c7899720 r5:c7a07ba0 r4:c7a7fca0 r3:c7a7fca0 [] (do_page_fault+0x0/0x14c) from [] (do_DataAbort+0x38/0xa0) [] (do_DataAbort+0x0/0xa0) from [] (__dabt_svc+0x4c/0x80) Exception stack(0xc7a7fca0 to 0xc7a7fce8) fca0: 00000027 00000002 00000002 00000000 c7a7fd78 c0333de0 00000006 00000000 fcc0: 00000000 00000000 c7a44e20 c7a7fcf4 c7a7fc30 c7a7fce8 c003e2e8 c002cbf0 fce0: 60000013 ffffffff r8:00000000 r7:00000000 r6:00000006 r5:c7a7fcd4 r4:ffffffff [] (__bug+0x0/0x30) from [] (iov_iter_copy_from_user_atomic+0x44/0xdc) [] (iov_iter_copy_from_user_atomic+0x0/0xdc) from [] (generic_perform_write+0xe8/0x1c4) r7:c02530e0 r6:00000006 r5:c7a78308 r4:c7a7fd78 [] (generic_perform_write+0x0/0x1c4) from [] (generic_file_buffered_write+0x5c/0x88) [] (generic_file_buffered_write+0x0/0x88) from [] (__generic_file_aio_write+0x468/0x4b4) r8:00000006 r7:c7a78258 r6:c7a44e20 r5:00000000 r4:00000000 [] (__generic_file_aio_write+0x0/0x4b4) from [] (generic_file_aio_write+0x78/0xe8) [] (generic_file_aio_write+0x0/0xe8) from [] (do_sync_write+0xa8/0xe4) [] (do_sync_write+0x0/0xe4) from [] (vfs_write+0xbc/0x148) r8:00000006 r7:c7a7ff70 r6:400c9000 r5:c7a44e20 r4:00000006 [] (vfs_write+0x0/0x148) from [] (sys_write+0x44/0x70) r8:00000006 r7:00000000 r6:00000000 r5:400c9000 r4:c7a44e20 [