From: Nick Piggin <nickpiggin@yahoo.com.au>
Date: Fri, 8 Jul 2005 00:56:56 +0000 (-0700)
Subject: [PATCH] page_uptodate locking scalability
X-Git-Tag: v2.6.13-rc3~251
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a39722034ae37f80a1803bf781fe3fe1b03e20bc;p=pandora-kernel.git

[PATCH] page_uptodate locking scalability

Use a bit spin lock in the first buffer of the page to synchronise asynch
IO buffer completions, instead of the global page_uptodate_lock, which is
showing some scalabilty problems.

Signed-off-by: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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