From 8db492ffc705aacdec78a2b41fbf58c7a0f6a74a Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Tue, 12 Feb 2019 15:35:51 -0800 Subject: [PATCH] Revert "mm: don't reclaim inodes with many attached pages" This reverts commit d660b535dd1c8 ("mm: don't reclaim inodes with many attached pages"). This change causes serious changes to page cache and inode cache behaviour and balance, resulting in major performance regressions when combining worklaods such as large file copies and kernel compiles. https://bugzilla.kernel.org/show_bug.cgi?id=202441 This change is a hack to work around the problems introduced by changing how agressive shrinkers are on small caches in commit d11df0151322 ("mm: slowly shrink slabs with a relatively small number of objects"). It creates more problems than it solves, wasn't adequately reviewed or tested, so it needs to be reverted. Link: http://lkml.kernel.org/r/20190130041707.27750-2-david@fromorbit.com Fixes: d660b535dd1c8 ("mm: don't reclaim inodes with many attached pages") Signed-off-by: Dave Chinner Cc: Wolfgang Walter Cc: Roman Gushchin Cc: Spock Cc: Rik van Riel Cc: Michal Hocko Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/inode.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/fs/inode.c b/fs/inode.c index 0cd47fe0dbe51..73432e64f8746 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -730,11 +730,8 @@ static enum lru_status inode_lru_isolate(struct list_head *item, return LRU_REMOVED; } - /* - * Recently referenced inodes and inodes with many attached pages - * get one more pass. - */ - if (inode->i_state & I_REFERENCED || inode->i_data.nrpages > 1) { + /* recently referenced inodes get one more pass */ + if (inode->i_state & I_REFERENCED) { inode->i_state &= ~I_REFERENCED; spin_unlock(&inode->i_lock); return LRU_ROTATE; -- 2.39.5