tree 46e972e78122f8a719dafc87572bffb25716e745
parent ad8d6f0a783ffa2ff9b0cf09910b889715772201
author Jens Axboe <axboe@suse.de> 1144012264 +0200
committer Jens Axboe <axboe@suse.de> 1144012264 +0200

[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>