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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2020-10-13 16:51:24 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-13 18:38:29 -0700 |
| commit | e6e88712e43b7942df451508aafc2f083266f56b (patch) | |
| tree | ee72fadc853f21222d73acc482f343bac49df7f6 /fs/proc | |
| parent | f5df8635c5a3c912919c91be64aa198554b0f9ed (diff) | |
| download | linux-e6e88712e43b7942df451508aafc2f083266f56b.tar.bz2 | |
mm: optimise madvise WILLNEED
Instead of calling find_get_entry() for every page index, use an XArray
iterator to skip over NULL entries, and avoid calling get_page(),
because we only want the swap entries.
[willy@infradead.org: fix LTP soft lockups]
Link: https://lkml.kernel.org/r/20200914165032.GS6583@casper.infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: William Kucharski <william.kucharski@oracle.com>
Cc: Qian Cai <cai@redhat.com>
Link: https://lkml.kernel.org/r/20200910183318.20139-4-willy@infradead.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc')
0 files changed, 0 insertions, 0 deletions