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authorKonstantin Khlebnikov <khlebnikov@openvz.org>2010-05-20 23:21:34 +0400
committerJens Axboe <jens.axboe@oracle.com>2010-05-24 09:06:59 +0200
commitbca4b914b5da3d8e7b9b647f620b71dc85c0c394 (patch)
treeed9c468396ec6ca6a04da9f7fbc341eee95e3930 /include/linux/iocontext.h
parentf4b87dee923342505e1ddba8d34ce9de33e75050 (diff)
downloadlinux-linaro-stable-bca4b914b5da3d8e7b9b647f620b71dc85c0c394.tar.gz
cfq-iosched: remove dead_key from cfq_io_context
Remove ->dead_key field from cfq_io_context to shrink its size to 128 bytes. (64 bytes for 32-bit hosts) Use lower bit in ->key as dead-mark, instead of moving key to separate field. After this for dead cfq_io_context we got cic->key != cfqd automatically. Thus, io_context's last-hit cache should work without changing. Now to check ->key for non-dead state compare it with cfqd, instead of checking ->key for non-null value as it was before. Plus remove obsolete race protection in cfq_cic_lookup. This race gone after v2.6.24-1728-g4ac845a Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include/linux/iocontext.h')
-rw-r--r--include/linux/iocontext.h1
1 files changed, 0 insertions, 1 deletions
diff --git a/include/linux/iocontext.h b/include/linux/iocontext.h
index a0bb301afac0..64d529133031 100644
--- a/include/linux/iocontext.h
+++ b/include/linux/iocontext.h
@@ -7,7 +7,6 @@
struct cfq_queue;
struct cfq_io_context {
void *key;
- unsigned long dead_key;
struct cfq_queue *cfqq[2];