[patch 6/9] blk: unplug later

6/9

--
SUSE Labs, Novell Inc.

get_request_wait needn't unplug the device immediately.

Signed-off-by: Nick Piggin <[email protected]>

Index: linux-2.6/drivers/block/ll_rw_blk.c
===================================================================
--- linux-2.6.orig/drivers/block/ll_rw_blk.c	2005-04-12 22:26:13.000000000 +1000
+++ linux-2.6/drivers/block/ll_rw_blk.c	2005-04-12 22:26:14.000000000 +1000
@@ -1955,7 +1955,6 @@ static struct request *get_request_wait(
 	DEFINE_WAIT(wait);
 	struct request *rq;
 
-	generic_unplug_device(q);
 	do {
 		struct request_list *rl = &q->rq;
 
@@ -1967,6 +1966,7 @@ static struct request *get_request_wait(
 		if (!rq) {
 			struct io_context *ioc;
 
+			generic_unplug_device(q);
 			io_schedule();
 
 			/*

Follow-Ups:
- Re: [patch 6/9] blk: unplug later
  - From: Andrew Morton <[email protected]>

References:
- [patch 0/9] various (mainly mempool fixes and block layer improvements)
  - From: Nick Piggin <[email protected]>

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