linux-kernel - [PATCH 0/2] zs_object_copy() micro-optimizations

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Message-Id: <1427210687-6634-1-git-send-email-sergey.senozhatsky@gmail.com>
Date:	Wed, 25 Mar 2015 00:24:45 +0900
From:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Minchan Kim <minchan@...nel.org>
Cc:	Nitin Gupta <ngupta@...are.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Subject: [PATCH 0/2] zs_object_copy() micro-optimizations

Hello,

two small patches two micro-optimize zs_object_copy().

The first one removes unneeded kunmap_atomic/kmap_atomic of dst page,
when object that we copy belongs to two source pages.

The seconds one is also trivial -- removes branching and (a bit)
reduses the amount of work done by the function (double offsets
calculations).

Sergey Senozhatsky (2):
  zsmalloc: do not remap dst page while prepare next src page
  zsmalloc: micro-optimize zs_object_copy()

 mm/zsmalloc.c | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

-- 
2.3.4

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