Re: Linux 6.11-rc2

[Guenter Roeck <linux@roeck-us.net>]

On Sun, Aug 04, 2024 at 02:00:57PM -0700, Linus Torvalds wrote:
> So rc1 had a fair number of annoying small build or test failures on
> Guenter's test matrix, which never looks good. But most of them seemed
> to be of the "stupid and trivial" variety, which obviously doesn't
> instill confidence in the process, but also isn't exactly scary. When
> the microblaze tinyconfig doesn't build cleanly, it may not be a great
> look, but it's also probably not a showstopper for actual use.
> 
> Hopefully we've gotten rid of the bulk of the silly noise here in rc2,
> and not added too much new noise, so that we can get on with the
> process of finding more meaningful issues.
> 

Build results:
	total: 158 pass: 158 fail: 0
Qemu test results:
	total: 539 pass: 516 fail: 23
Failed tests:
	microblaze:petalogix-s3adsp1800:initrd
	microblaze:petalogix-s3adsp1800:rootfs
	microblaze:petalogix-ml605:initrd
	microblaze:petalogix-ml605:rootfs
	microblazeel:petalogix-s3adsp1800:initrd
	microblazeel:petalogix-s3adsp1800:rootfs
	microblazeel:petalogix-ml605:initrd
	microblazeel:petalogix-ml605:rootfs
	mips64:malta:malta_defconfig:nocd:smp:net=e1000-82544gc:ide:ext2
	ppc:mpc8544ds:mpc85xx_defconfig:net=e1000:initrd
	ppc:mpc8544ds:mpc85xx_defconfig:scsi[53C895A]:net=ne2k_pci:btrfs
	ppc:mpc8544ds:mpc85xx_defconfig:sata-sii3112:net=rtl8139:ext2
	ppc:mpc8544ds:mpc85xx_defconfig:sdhci-mmc:net=usb-ohci:ext2
	ppc:mpc8544ds:mpc85xx_smp_defconfig:net=e1000:initrd
	ppc:mpc8544ds:mpc85xx_smp_defconfig:scsi[DC395]:net=i82550:ext2
	ppc:mpc8544ds:mpc85xx_smp_defconfig:scsi[53C895A]:net=usb-ohci:btrfs
	ppc:mpc8544ds:mpc85xx_smp_defconfig:sata-sii3112:net=ne2k_pci:ext2
	ppc:ppce500:corenet32_smp_defconfig:e500:net=rtl8139:initrd
	ppc:ppce500:corenet32_smp_defconfig:e500:net=virtio-net:nvme:btrfs
	ppc:ppce500:corenet32_smp_defconfig:e500:net=eTSEC:sdhci-mmc:ext2
	ppc:ppce500:corenet32_smp_defconfig:e500:net=e1000:mmc:cramfs
	ppc:ppce500:corenet32_smp_defconfig:e500:net=tulip:scsi[53C895A]:ext2
	ppc:ppce500:corenet32_smp_defconfig:e500:net=i82562:sata-sii3112:ext2
Unit test results:
	pass: 332158 fail: 0

The microblaze test failures are triggered by commit 721f4a6526da
("mm/memblock: remove empty dummy entry"). The fix is at
https://lore.kernel.org/all/20240729053327.4091459-1-rppt@kernel.org/
and should hopefully be sent upstream in the near future.

The ppc failures bisect to commit 6b0e82791bd0 ("powerpc/e500: switch to 64
bits PGD on 85xx (32 bits)"). This commit is related to other hugepage
related patches and can not easily be reverted. I don't know the status.
Given the context (changing the pgd sixe) it may well be a qemu problem.

The mips64 test failure is a networking interface failure. It started
happening a week or two ago. The problem is spurious and thus difficult
to bisect.

There is also a spurious failure with parisc64 images, triggered by commit
c37927a203fa ("genirq: Set IRQF_COND_ONESHOT in request_irq()"). The same
problem is also seen in v6.10.3 where that patch was backported. This is a
heisenbug: Any debugging added to figure out what is going on makes it
disappear. I don't know if it is a race condition or a bug in qemu or
something else. I did not see this problem with v6.11-rc2 but with an
interim image (v6.11-rc1-272-g17712b7ea075).

Guenter