On 2025/8/13 22:53, Greg Kroah-Hartman wrote: > On Wed, Aug 13, 2025 at 08:01:51PM +0530, Naresh Kamboju wrote: >> Hi Greg, >> >>>> 2) >>>> >>>> The following list of LTP syscalls failure noticed on qemu-arm64 with >>>> stable-rc 6.16.1-rc1 with CONFIG_ARM64_64K_PAGES=y build configuration. >>>> >>>> Most failures report ENOSPC (28) or mkswap errors, which may be related >>>> to disk space handling in the 64K page configuration on qemu-arm64. >>>> >>>> The issue is reproducible on multiple runs. >>>> >>>> * qemu-arm64, ltp-syscalls - 64K page size test failures list, >>>> >>>> - fallocate04 >>>> - fallocate05 >>>> - fdatasync03 >>>> - fsync01 >>>> - fsync04 >>>> - ioctl_fiemap01 >>>> - swapoff01 >>>> - swapoff02 >>>> - swapon01 >>>> - swapon02 >>>> - swapon03 >>>> - sync01 >>>> - sync_file_range02 >>>> - syncfs01 >>>> >>>> Reproducibility: >>>> - 64K config above listed test fails >>>> - 4K config above listed test pass. >>>> >>>> Regression Analysis: >>>> - New regression? yes >>> >>> Regression from 6.16? Or just from 6.15.y? >> >> Based on available data, the issue is not present in v6.16 or v6.15. >> >> Anders, bisected this regression and found, >> >> ext4: correct the reserved credits for extent conversion >> [ Upstream commit 95ad8ee45cdbc321c135a2db895d48b374ef0f87 ] >> >> Report lore link, >> >> https://lore.kernel.org/stable/ca+g9fytbncsa2zkacn-ozkyz8jz5fzj0hs7djsfmeamq3ax...@mail.gmail.com/ > > Great, and that's also affecting 6.17-rc1 so we are "bug compatible"? > :) >
Hi, This issue has already fixed in 6.17-rc1 through this series: https://lore.kernel.org/linux-ext4/20250707140814.542883-1-yi.zh...@huaweicloud.com/ To fix this issue in 6.16, it's necessary to backport the whole series instead of just pick 5137d6c8906b ("ext4: fix insufficient credits calculation in ext4_meta_trans_blocks()") and 95ad8ee45cdb {"ext4: correct the reserved credits for extent conversion"). Otherwise, this will make the problem more likely to occur. Thanks, Yi.
