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| author | Huang Ying <ying.huang@intel.com> | 2017-09-06 16:22:30 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-09-06 17:27:28 -0700 |
| commit | 225311a46411c37e20e73d99f4382f141e12f6f9 (patch) | |
| tree | 07073d6ba4af58e79fb91cbc7dfb9b985852005e /mm/vmstat.c | |
| parent | 98cc093cba1e925eb34963dedb5f1684f1bdb2f4 (diff) | |
| download | linux-225311a46411c37e20e73d99f4382f141e12f6f9.tar.gz linux-225311a46411c37e20e73d99f4382f141e12f6f9.tar.bz2 linux-225311a46411c37e20e73d99f4382f141e12f6f9.zip | |
mm: test code to write THP to swap device as a whole
To support delay splitting THP (Transparent Huge Page) after swapped
out, we need to enhance swap writing code to support to write a THP as a
whole. This will improve swap write IO performance.
As Ming Lei <ming.lei@redhat.com> pointed out, this should be based on
multipage bvec support, which hasn't been merged yet. So this patch is
only for testing the functionality of the other patches in the series.
And will be reimplemented after multipage bvec support is merged.
Link: http://lkml.kernel.org/r/20170724051840.2309-7-ying.huang@intel.com
Signed-off-by: "Huang, Ying" <ying.huang@intel.com>
Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Ross Zwisler <ross.zwisler@intel.com> [for brd.c, zram_drv.c, pmem.c]
Cc: Shaohua Li <shli@kernel.org>
Cc: Vishal L Verma <vishal.l.verma@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmstat.c')
| -rw-r--r-- | mm/vmstat.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c index 9a4441bbeef2..bccf426453cd 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1071,6 +1071,7 @@ const char * const vmstat_text[] = { #endif "thp_zero_page_alloc", "thp_zero_page_alloc_failed", + "thp_swpout", #endif #ifdef CONFIG_MEMORY_BALLOON "balloon_inflate", |