From: Jens Axboe <axboe@suse.de>
Date: Sun, 2 Apr 2006 21:11:04 +0000 (+0200)
Subject: [PATCH] splice: fix page stealing LRU handling.
X-Git-Tag: v2.6.17-rc1~2^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3e7ee3e7b36fa4e2d88d8fb0a2577be95fc4636d;p=pandora-kernel.git

[PATCH] splice: fix page stealing LRU handling.

Originally from Nick Piggin, just adapted to the newer branch.

You can't check PageLRU without holding zone->lru_lock.  The page
release code can get away with it only because the page refcount is 0 at
that point. Also, you can't reliably remove pages from the LRU unless
the refcount is 0. Ever.

Signed-off-by: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Jens Axboe <axboe@suse.de>
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