linux-kernel - [PATCH v1 5/6] blk-mq: fix for trace_block

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1445097154-18229-6-git-send-email-ming.lei@canonical.com>
Date:	Sat, 17 Oct 2015 23:52:33 +0800
From:	Ming Lei <ming.lei@...onical.com>
To:	Jens Axboe <axboe@...nel.dk>, linux-kernel@...r.kernel.org
Cc:	Ming Lin <ming.l@....samsung.com>,
	Kent Overstreet <kent.overstreet@...il.com>,
	Christoph Hellwig <hch@...radead.org>,
	Jeff Moyer <jmoyer@...hat.com>,
	Ming Lei <ming.lei@...onical.com>
Subject: [PATCH v1 5/6] blk-mq: fix for trace_block_plug()

The trace point is for tracing plug event of each request
queue instead of each task, so we should check the request
count in the plug list from current queue instead of
current task.

Signed-off-by: Ming Lei <ming.lei@...onical.com>
---
 block/blk-mq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index d55d022..a5e33bc 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1377,7 +1377,7 @@ static void blk_sq_make_request(struct request_queue *q, struct bio *bio)
 	plug = current->plug;
 	if (plug) {
 		blk_mq_bio_to_request(rq, bio);
-		if (list_empty(&plug->mq_list))
+		if (!request_count)
 			trace_block_plug(q);
 		else if (request_count >= BLK_MAX_REQUEST_COUNT) {
 			blk_flush_plug_list(plug, false);
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/