From: Josef Bacik <josef@redhat.com>
Date: Tue, 5 Apr 2011 17:02:27 +0000 (-0400)
Subject: Btrfs: map the inode item when doing fill_inode_item
X-Git-Tag: v2.6.39-rc4~5^2~9^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=12ddb96cb6752218d8a1aeb696ec9b0ca7adb42f;p=pandora-kernel.git

Btrfs: map the inode item when doing fill_inode_item

Instead of calling kmap_atomic for every thing we set in the inode item, map the
entire inode item at the start and unmap it at the end.  This makes a sequential
dd of 400mb O_DIRECT something like 1% faster.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
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