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authorSergey Senozhatsky <sergey.senozhatsky@gmail.com>2015-09-09 01:04:35 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-09 01:35:28 +0300
commit7d3f3938236b4bb878214e6791e76fd8409bdeee (patch)
treea28c0a163b7a88ddf5f728331e8a7a87f5d8d209 /drivers/hid/hid-roccat-pyra.c
parent0dc63d488a2a433a4a85d3908b3f195c4e6450d2 (diff)
downloadlinux-7d3f3938236b4bb878214e6791e76fd8409bdeee.tar.xz
zsmalloc/zram: introduce zs_pool_stats api
`zs_compact_control' accounts the number of migrated objects but it has a limited lifespan -- we lose it as soon as zs_compaction() returns back to zram. It worked fine, because (a) zram had it's own counter of migrated objects and (b) only zram could trigger compaction. However, this does not work for automatic pool compaction (not issued by zram). To account objects migrated during auto-compaction (issued by the shrinker) we need to store this number in zs_pool. Define a new `struct zs_pool_stats' structure to keep zs_pool's stats there. It provides only `num_migrated', as of this writing, but it surely can be extended. A new zsmalloc zs_pool_stats() symbol exports zs_pool's stats back to caller. Use zs_pool_stats() in zram and remove `num_migrated' from zram_stats. Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Suggested-by: 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 'drivers/hid/hid-roccat-pyra.c')
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