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| author | Aaron Tomlin <atomlin@redhat.com> | 2014-01-29 23:05:38 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-30 01:22:39 +0100 |
| commit | 8582cb96b0bfd6891766d8c30d759bf21aad3b4d (patch) | |
| tree | e603a54867acf33e5424d71f34e891b8dbb4e1bf /mm/page-writeback.c | |
| parent | lib/genalloc.c: add check gen_pool_dma_alloc() if dma pointer is not NULL (diff) | |
| download | linux-8582cb96b0bfd6891766d8c30d759bf21aad3b4d.tar.xz linux-8582cb96b0bfd6891766d8c30d759bf21aad3b4d.zip | |
mm: document improved handling of swappiness==0
Prior to commit fe35004fbf9e ("mm: avoid swapping out with
swappiness==0") setting swappiness to 0, reclaim code could still evict
recently used user anonymous memory to swap even though there is a
significant amount of RAM used for page cache.
The behaviour of setting swappiness to 0 has since changed. When set,
the reclaim code does not initiate swap until the amount of free pages
and file-backed pages, is less than the high water mark in a zone.
Let's update the documentation to reflect this.
[akpm@linux-foundation.org: remove comma, per Randy]
Signed-off-by: Aaron Tomlin <atomlin@redhat.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Bryn M. Reeves <bmr@redhat.com>
Cc: Satoru Moriya <satoru.moriya@hds.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page-writeback.c')
0 files changed, 0 insertions, 0 deletions