On 26/02/2024 20:55, Zi Yan wrote: > From: Zi Yan <ziy@xxxxxxxxxx> > > It is used to test split_huge_page_to_list_to_order for pagecache THPs. > Also add test cases for split_huge_page_to_list_to_order via both > debugfs. > > Signed-off-by: Zi Yan <ziy@xxxxxxxxxx> > --- > mm/huge_memory.c | 34 ++++-- > .../selftests/mm/split_huge_page_test.c | 115 +++++++++++++++++- > 2 files changed, 131 insertions(+), 18 deletions(-) > Hi Zi, When booting the kernel against next-master(20240228)with Arm64 on Marvell Thunder X2 (TX2), the kselftest-mm test 'split_huge_page_test' is failing in our CI (with rootfs over NFS). I can send the full logs if required. A bisect (full log below) identified this patch as introducing the failure. Bisected it on the tag "next-20240228" at repo "https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git";. This works fine on Linux version 6.8.0-rc6 Sample log from failure against run on TX2: ------ 07:17:34.056125 # # ------------------------------ 07:17:34.056543 # # running ./split_huge_page_test 07:17:34.056839 # # ------------------------------ 07:17:34.057114 # # TAP version 13 07:17:34.058564 # # 1..12 07:17:34.156822 # # ok 1 Split huge pages successful 07:17:34.214074 # # ok 2 Split PTE-mapped huge pages successful 07:17:34.215630 # # # Please enable pr_debug in split_huge_pages_in_file() for more info. 07:17:34.225503 # # # Please check dmesg for more information 07:17:34.225862 # # ok 3 File-backed THP split test done 07:17:34.236944 # # Bail out! Failed to create a file at /mnt/thp_fs# Planned tests != run tests (12 != 3) 07:17:34.237307 # # # Totals: pass:3 fail:0 xfail:0 xpass:0 skip:0 error:0 07:17:34.237620 # # [FAIL] 07:17:34.246430 # not ok 51 split_huge_page_test # exit=1 Bisect log: ------ git bisect start # good: [d206a76d7d2726f3b096037f2079ce0bd3ba329b] Linux 6.8-rc6 git bisect good d206a76d7d2726f3b096037f2079ce0bd3ba329b # bad: [20af1ca418d2c0b11bc2a1fe8c0c88f67bcc2a7e] Add linux-next specific files for 20240228 git bisect bad 20af1ca418d2c0b11bc2a1fe8c0c88f67bcc2a7e # bad: [1322f1801e59dddce10591d602d246c1bf49990c] Merge branch 'main' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git git bisect bad 1322f1801e59dddce10591d602d246c1bf49990c # bad: [a82f70041487790b7b09fe4bb45436e1b57021d3] Merge branch 'dev' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git git bisect bad a82f70041487790b7b09fe4bb45436e1b57021d3 # bad: [ce90480b9352ba2bebe8946dad9223e3f24c6e9a] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap.git git bisect bad ce90480b9352ba2bebe8946dad9223e3f24c6e9a # bad: [5daac92ed3881fd0c656478a301a4e1d124100ee] Merge branch 'mm-everything' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm git bisect bad 5daac92ed3881fd0c656478a301a4e1d124100ee # good: [acc2643d9e988c63dd4629a9af380ad9ac69c54a] Merge branch 'mm-stable' into mm-unstable git bisect good acc2643d9e988c63dd4629a9af380ad9ac69c54a # good: [0294de8fe7d7c1a7eddc979cbf4c1886406e36b7] Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply.git git bisect good 0294de8fe7d7c1a7eddc979cbf4c1886406e36b7 # good: [83e0c8f0e777a1ef0977b2f8189101765703b32d] Merge branch 'mm-nonmm-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm git bisect good 83e0c8f0e777a1ef0977b2f8189101765703b32d # good: [a739cbe236e0dd3b6ff26a01fa1d31c73d4fac93] mm: memcg: make memcg huge page split support any order split git bisect good a739cbe236e0dd3b6ff26a01fa1d31c73d4fac93 # bad: [efb520aa333b2f11daaaaa13f4a598b5ae4ae823] mm: allow non-hugetlb large folios to be batch processed git bisect bad efb520aa333b2f11daaaaa13f4a598b5ae4ae823 # bad: [2258bdebb55e3ad3d30fd3849ddb955ff36825de] mm/zsmalloc: don't hold locks of all pages when free_zspage() git bisect bad 2258bdebb55e3ad3d30fd3849ddb955ff36825de # bad: [7fc0be45acf2878cbacc4dba56923c34c3fd8b1e] mm: remove total_mapcount() git bisect bad 7fc0be45acf2878cbacc4dba56923c34c3fd8b1e # good: [d55fac55da2f87ad5a99178e107df09770bbc411] mm: thp: split huge page to any lower order pages git bisect good d55fac55da2f87ad5a99178e107df09770bbc411 # bad: [4050d591c1aaf9336c08511fa5984827186e9ad1] mm/memfd: refactor memfd_tag_pins() and memfd_wait_for_pins() git bisect bad 4050d591c1aaf9336c08511fa5984827186e9ad1 # bad: [c0ba89c29ef559c95273feb481b049f622c43c17] mm: huge_memory: enable debugfs to split huge pages to any order git bisect bad c0ba89c29ef559c95273feb481b049f622c43c17 # first bad commit: [c0ba89c29ef559c95273feb481b049f622c43c17] mm: huge_memory: enable debugfs to split huge pages to any order Thanks, Aishwarya
