From: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Date: Wed, 10 Jun 2009 04:38:41 +0000 (+0000)
Subject: ps3vram: Replace mutex by spinlock + bio_list
X-Git-Tag: v2.6.31-rc1~314^2~13
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fb89e89d0ff6142f0616eb8260ea89d6fd924982;p=pandora-kernel.git

ps3vram: Replace mutex by spinlock + bio_list

Remove the mutex serializing access to the cache.
Instead, queue up new requests on a bio_list if the driver is busy.

This improves sequential write performance by ca. 2%.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Cc: Jim Paris <jim@jtan.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

Reading git-diff-tree failed