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| author | Sergey Senozhatsky <sergey.senozhatsky@gmail.com> | 2014-04-07 15:38:17 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-07 16:36:01 -0700 |
| commit | e46b8a030d76d3c94156c545c3f4c3676d813435 (patch) | |
| tree | 9629389f89d3086a6428ec6a8e47bc59ddfcf3ec /drivers/block/zram/zcomp.h | |
| parent | fe8eb122c82b2049c460fc6df6e8583a2f935cff (diff) | |
zram: make compression algorithm selection possible
Add and document `comp_algorithm' device attribute. This attribute allows
to show supported compression and currently selected compression
algorithms:
cat /sys/block/zram0/comp_algorithm
[lzo] lz4
and change selected compression algorithm:
echo lzo > /sys/block/zram0/comp_algorithm
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Jerome Marchand <jmarchan@redhat.com>
Cc: Nitin Gupta <ngupta@vflare.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/block/zram/zcomp.h')
| -rw-r--r-- | drivers/block/zram/zcomp.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/block/zram/zcomp.h b/drivers/block/zram/zcomp.h index bd11d59c5dd1..8b8997f8613b 100644 --- a/drivers/block/zram/zcomp.h +++ b/drivers/block/zram/zcomp.h @@ -50,6 +50,8 @@ struct zcomp { void (*destroy)(struct zcomp *comp); }; +ssize_t zcomp_available_show(const char *comp, char *buf); + struct zcomp *zcomp_create(const char *comp, int max_strm); void zcomp_destroy(struct zcomp *comp); |