Messages in this thread | | | From | Wei Yang <> | Subject | [RESEND [PATCH] 0/2] mm/mmap.c: reduce subtree gap propagation a little | Date | Wed, 28 Aug 2019 14:06:12 +0800 |
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When insert and delete a vma, it will compute and propagate related subtree gap. After some investigation, we can reduce subtree gap propagation a little.
[1]: This one reduce the propagation by update *next* gap after itself, since *next* must be a parent in this case. [2]: This one achieve this by unlinking vma from list.
After applying these two patches, test shows it reduce 0.3% function call for vma_compute_subtree_gap.
BTW, this series is based on some un-merged cleanup patched.
--- This version is rebased on current linus tree, whose last commit is commit 9e8312f5e160 ("Merge tag 'nfs-for-5.3-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs").
Wei Yang (2): mm/mmap.c: update *next* gap after itself mm/mmap.c: unlink vma before rb_erase
mm/mmap.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-)
-- 2.17.1
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