The patch titled Subject: xfs: warn if direct reclaim tries to writeback pages has been removed from the -mm tree. Its filename was xfs-warn-if-direct-reclaim-tries-to-writeback-pages.patch This patch was dropped because it was merged into mainline or a subsystem tree The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ From: Mel Gorman <mgorman@xxxxxxx> Subject: xfs: warn if direct reclaim tries to writeback pages Direct reclaim should never writeback pages. For now, handle the situation and warn about it. Ultimately, this will be a BUG_ON. Signed-off-by: Mel Gorman <mgorman@xxxxxxx> Cc: Dave Chinner <david@xxxxxxxxxxxxx> Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx> Cc: Johannes Weiner <jweiner@xxxxxxxxxx> Cc: Wu Fengguang <fengguang.wu@xxxxxxxxx> Cc: Jan Kara <jack@xxxxxxx> Cc: Minchan Kim <minchan.kim@xxxxxxxxx> Cc: Rik van Riel <riel@xxxxxxxxxx> Cc: Mel Gorman <mgorman@xxxxxxx> Cc: Alex Elder <aelder@xxxxxxx> Cc: Theodore Ts'o <tytso@xxxxxxx> Cc: Chris Mason <chris.mason@xxxxxxxxxx> Cc: Dave Hansen <dave@xxxxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- fs/xfs/xfs_aops.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff -puN fs/xfs/xfs_aops.c~xfs-warn-if-direct-reclaim-tries-to-writeback-pages fs/xfs/xfs_aops.c --- a/fs/xfs/xfs_aops.c~xfs-warn-if-direct-reclaim-tries-to-writeback-pages +++ a/fs/xfs/xfs_aops.c @@ -902,11 +902,11 @@ xfs_vm_writepage( * random callers for direct reclaim or memcg reclaim. We explicitly * allow reclaim from kswapd as the stack usage there is relatively low. * - * This should really be done by the core VM, but until that happens - * filesystems like XFS, btrfs and ext4 have to take care of this - * by themselves. + * This should never happen except in the case of a VM regression so + * warn about it. */ - if ((current->flags & (PF_MEMALLOC|PF_KSWAPD)) == PF_MEMALLOC) + if (WARN_ON_ONCE((current->flags & (PF_MEMALLOC|PF_KSWAPD)) == + PF_MEMALLOC)) goto redirty; /* _ Patches currently in -mm which might be from mgorman@xxxxxxx are origin.patch mm-page-writebackc-make-determine_dirtyable_memory-static-again.patch thp-tail-page-refcounting-fix-5.patch powerpc-remove-superfluous-pagetail-checks-on-the-pte-gup_fast.patch powerpc-get_hugepte-dont-put_page-the-wrong-page.patch powerpc-gup_hugepte-avoid-to-free-the-head-page-too-many-times.patch powerpc-gup_hugepte-support-thp-based-tail-recounting.patch powerpc-gup_huge_pmd-return-0-if-pte-changes.patch s390-gup_huge_pmd-support-thp-tail-recounting.patch s390-gup_huge_pmd-return-0-if-pte-changes.patch sparc-gup_pte_range-support-thp-based-tail-recounting.patch thp-share-get_huge_page_tail.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html