On 2025/2/10 12:18, Zi Yan wrote:
On 9 Feb 2025, at 23:02, Qi Zheng wrote:
Hi Zi,
On 2025/2/10 11:35, Zi Yan wrote:
On 7 Feb 2025, at 17:17, Matthew Wilcox wrote:
On Fri, Feb 07, 2025 at 04:29:36PM +0100, Christian Brauner wrote:
while true; do ./xfs.run.sh "generic/437"; done
allows me to reproduce this fairly quickly.
on holiday, back monday
git bisect points to commit
4817f70c25b6 ("x86: select ARCH_SUPPORTS_PT_RECLAIM if X86_64").
Qi is cc'd.
After deselect PT_RECLAIM on v6.14-rc1, the issue is gone.
At least, no splat after running for more than 300s,
whereas the splat is usually triggered after ~20s with
PT_RECLAIM set.
The PT_RECLAIM mainly made the following two changes:
1) try to reclaim page table pages during madvise(MADV_DONTNEED)
2) Unconditionally select MMU_GATHER_RCU_TABLE_FREE
Will ./xfs.run.sh "generic/437" perform the madvise(MADV_DONTNEED)?
Yes. See: https://github.com/kdave/xfstests/blob/master/src/t_mmap_cow_race.c#L34
Got it.
Anyway, I will try to reproduce it locally and troubleshoot it.
You will need xfstests and run "while true; do sudo ./check "generic/437"; done".
The local.config for xfstests is at:
https://lore.kernel.org/linux-mm/20250207-anbot-bankfilialen-acce9d79a2c7@brauner/
OK, will do. Thanks!
--
Best Regards,
Yan, Zi
