From: Chris Mason <chris.mason@oracle.com>
Date: Wed, 10 Jun 2009 13:51:32 +0000 (-0400)
Subject: Btrfs: autodetect SSD devices
X-Git-Tag: v2.6.31-rc1~380^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c289811cc096c57ff35550ee8132793a4f9b5b59;p=pandora-kernel.git

Btrfs: autodetect SSD devices

During mount, btrfs will check the queue nonrot flag
for all the devices found in the FS.  If they are all
non-rotating, SSD mode is enabled by default.

If the FS was mounted with -o nossd, the non-rotating
flag is ignored.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
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