From 422765c2638924da10ff363b5eed77924911bdc7 Mon Sep 17 00:00:00 2001 From: Jianpeng Ma Date: Fri, 11 Jan 2013 14:46:09 +0100 Subject: block: Remove should_sort judgement when flush blk_plug In commit 975927b942c932,it add blk_rq_pos to sort rq when flushing. Although this commit was used for the situation which blk_plug handled multi devices on the same time like md device. I think there must be some situations like this but only single device. So remove the should_sort judgement. Because the parameter should_sort is only for this purpose,it can delete should_sort from blk_plug. CC: Shaohua Li Signed-off-by: Jianpeng Ma Signed-off-by: Jens Axboe --- block/blk-core.c | 13 +------------ 1 file changed, 1 insertion(+), 12 deletions(-) (limited to 'block/blk-core.c') diff --git a/block/blk-core.c b/block/blk-core.c index c973249d68cd..aca5d82ff13c 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -1548,13 +1548,6 @@ get_rq: if (list_empty(&plug->list)) trace_block_plug(q); else { - if (!plug->should_sort) { - struct request *__rq; - - __rq = list_entry_rq(plug->list.prev); - if (__rq->q != q) - plug->should_sort = 1; - } if (request_count >= BLK_MAX_REQUEST_COUNT) { blk_flush_plug_list(plug, false); trace_block_plug(q); @@ -2888,7 +2881,6 @@ void blk_start_plug(struct blk_plug *plug) plug->magic = PLUG_MAGIC; INIT_LIST_HEAD(&plug->list); INIT_LIST_HEAD(&plug->cb_list); - plug->should_sort = 0; /* * If this is a nested plug, don't actually assign it. It will be @@ -2990,10 +2982,7 @@ void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule) list_splice_init(&plug->list, &list); - if (plug->should_sort) { - list_sort(NULL, &list, plug_rq_cmp); - plug->should_sort = 0; - } + list_sort(NULL, &list, plug_rq_cmp); q = NULL; depth = 0; -- cgit v1.2.3