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| author | Yu Zhao | 2018-02-01 01:19:59 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2018-02-01 02:18:39 +0100 |
| commit | 9c3760eb80880f3e02546e0a2ef479e1454986b3 (patch) | |
| tree | e0f90aca53a602676bf50160ad1efbe0ac66a352 /mm/zsmalloc.c | |
| parent | mm/fadvise: discard partial page if endbyte is also EOF (diff) | |
| download | kernel-qcow2-linux-9c3760eb80880f3e02546e0a2ef479e1454986b3.tar.gz kernel-qcow2-linux-9c3760eb80880f3e02546e0a2ef479e1454986b3.tar.xz kernel-qcow2-linux-9c3760eb80880f3e02546e0a2ef479e1454986b3.zip | |
zswap: only save zswap header when necessary
We waste sizeof(swp_entry_t) for zswap header when using zsmalloc as
zpool driver because zsmalloc doesn't support eviction.
Add zpool_evictable() to detect if zpool is potentially evictable, and
use it in zswap to avoid waste memory for zswap header.
[yuzhao@google.com: The zpool->" prefix is a result of copy & paste]
Link: http://lkml.kernel.org/r/20180110225626.110330-1-yuzhao@google.com
Link: http://lkml.kernel.org/r/20180110224741.83751-1-yuzhao@google.com
Signed-off-by: Yu Zhao <yuzhao@google.com>
Acked-by: Dan Streetman <ddstreet@ieee.org>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Seth Jennings <sjenning@redhat.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/zsmalloc.c')
| -rw-r--r-- | mm/zsmalloc.c | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index e136a8e72c48..f797d8b0d820 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -404,12 +404,6 @@ static void zs_zpool_free(void *pool, unsigned long handle) zs_free(pool, handle); } -static int zs_zpool_shrink(void *pool, unsigned int pages, - unsigned int *reclaimed) -{ - return -EINVAL; -} - static void *zs_zpool_map(void *pool, unsigned long handle, enum zpool_mapmode mm) { @@ -447,7 +441,6 @@ static struct zpool_driver zs_zpool_driver = { .destroy = zs_zpool_destroy, .malloc = zs_zpool_malloc, .free = zs_zpool_free, - .shrink = zs_zpool_shrink, .map = zs_zpool_map, .unmap = zs_zpool_unmap, .total_size = zs_zpool_total_size, |