From bca4b914b5da3d8e7b9b647f620b71dc85c0c394 Mon Sep 17 00:00:00 2001 From: Konstantin Khlebnikov Date: Thu, 20 May 2010 23:21:34 +0400 Subject: 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 Signed-off-by: Jens Axboe --- include/linux/iocontext.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include/linux/iocontext.h') 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]; -- cgit v1.2.3