linux-kernel - [PATCH 0/2] zram: switch to per-cpu compression streams

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Message-Id: <1461860230-849-1-git-send-email-sergey.senozhatsky@gmail.com>
Date:	Fri, 29 Apr 2016 01:17:08 +0900
From:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
To:	Minchan Kim <minchan@...nel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Subject: [PATCH 0/2] zram: switch to per-cpu compression streams

Hello,

The patchset drops idle compression streams list from zcomp, so
zram now is using per-cpu compression streams. This removes two
spin_lock()/spin_unlock() calls from the write path and prevents
write OP from being preempted with active compression stream,
which improves performance (according to the tests, see commit
messages) and simplifies the code.

against next-20160428

Sergey Senozhatsky (2):
  zsmalloc: require GFP in zs_malloc()
  zram: user per-cpu compression streams

 drivers/block/zram/zcomp.c    | 293 ++++++++++++------------------------------
 drivers/block/zram/zcomp.h    |  12 +-
 drivers/block/zram/zram_drv.c |  34 ++++-
 include/linux/zsmalloc.h      |   2 +-
 mm/zsmalloc.c                 |  15 +--
 5 files changed, 119 insertions(+), 237 deletions(-)

-- 
2.8.0