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authorMinchan Kim <minchan@kernel.org>2018-06-07 17:05:42 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-06-07 17:34:34 -0700
commit89e85bce4b02edb7408aebf69d5d1a6692a05f4f (patch)
treeedcf57724445af23cf3d97d904903722359f7d78 /Documentation
parentc4d6c4cc7bfd5ecc18548420b7fb9440cf8416ae (diff)
zram: mark incompressible page as ZRAM_HUGE
Mark incompressible pages so that we could investigate who is the owner of the incompressible pages once the page is swapped out via using upcoming zram memory tracker feature. With it, we could prevent such pages to be swapped out by using mlock. Otherwise we might remove them. This patch exposes new stat for huge pages via mm_stat. Link: http://lkml.kernel.org/r/20180416090946.63057-3-minchan@kernel.org Signed-off-by: Minchan Kim <minchan@kernel.org> Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/blockdev/zram.txt1
1 files changed, 1 insertions, 0 deletions
diff --git a/Documentation/blockdev/zram.txt b/Documentation/blockdev/zram.txt
index 257e65714c6a..78db38d02bc9 100644
--- a/Documentation/blockdev/zram.txt
+++ b/Documentation/blockdev/zram.txt
@@ -218,6 +218,7 @@ line of text and contains the following stats separated by whitespace:
same_pages the number of same element filled pages written to this disk.
No memory is allocated for such pages.
pages_compacted the number of pages freed during compaction
+ huge_pages the number of incompressible pages
9) Deactivate:
swapoff /dev/zram0