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(parent: d1254b1) | patch
fix rcu_read_lock() in page migraton
authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Fri, 31 Aug 2007 06:56:21 +0000 (23:56 -0700)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Fri, 31 Aug 2007 08:42:22 +0000 (01:42 -0700)
commit989f89c57e6361e7d16fbd9572b5da7d313b073d
treecd5f655709e1515568c1e1f309f169723ce3b084tree
parentd1254b12c93e1e586137a2ffef71fd33cf273f35commit | diff
fix rcu_read_lock() in page migraton

In migration fallback path, write_page() or lock_page() will be called.
This causes sleep with holding rcu_read_lock().
For avoding that, just do rcu_lock if the page is Anon.(this is enough.)

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/migrate.c diff | blob | history
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