Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Tang Junhui <tang.junhui.linux@gmail.com>,
        Coly Li <colyli@suse.de>, Jens Axboe <axboe@kernel.dk>
Subject: [PATCH 4.14 003/222] bcache: trace missed reading by cache_missed
Date:   Sun, 11 Nov 2018 14:21:40 -0800
Message-Id: <20181111221648.108037012@linuxfoundation.org>
In-Reply-To: <20181111221647.665769131@linuxfoundation.org>
References: <20181111221647.665769131@linuxfoundation.org>
User-Agent: quilt/0.65
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tang Junhui <tang.junhui.linux@gmail.com>

commit 502b291568fc7faf1ebdb2c2590f12851db0ff76 upstream.

Missed reading IOs are identified by s->cache_missed, not the
s->cache_miss, so in trace_bcache_read() using trace_bcache_read
to identify whether the IO is missed or not.

Signed-off-by: Tang Junhui <tang.junhui.linux@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/md/bcache/request.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@ -792,7 +792,7 @@ static void cached_dev_read_done_bh(stru
 
 	bch_mark_cache_accounting(s->iop.c, s->d,
 				  !s->cache_missed, s->iop.bypass);
-	trace_bcache_read(s->orig_bio, !s->cache_miss, s->iop.bypass);
+	trace_bcache_read(s->orig_bio, !s->cache_missed, s->iop.bypass);
 
 	if (s->iop.status)
 		continue_at_nobarrier(cl, cached_dev_read_error, bcache_wq);