linux-kernel - [PATCH 1/2] block: make blk_update_request print prefix match ratelimited prefix

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Date:	Wed, 27 Aug 2014 10:50:31 -0500
From:	Robert Elliott <elliott@...com>
To:	axboe@...nel.dk, webbnh@...com, linux-kernel@...r.kernel.org,
	relliott@...rdog.cce.hp.com, linux-fsdevel@...r.kernel.org,
	viro@...iv.linux.org.uk, elliott@...com,
	scameron@...rdog.cce.hp.com
Subject: [PATCH 1/2] block: make blk_update_request print prefix match
	ratelimited prefix

In blk_update_request, change the printk_ratelimited
prefix from end_request to blk_update_request so it
matches the name printed if rate limiting occurs.

Old:
[10234.933106] blk_update_request: 174 callbacks suppressed
[10234.934940] end_request: critical target error, dev sdr, sector 16
[10234.949788] end_request: critical target error, dev sdr, sector 16

New:
[16863.445173] blk_update_request: 398 callbacks suppressed
[16863.447029] blk_update_request: critical target error, dev sdr, sector
1442066176
[16863.449383] blk_update_request: critical target error, dev sdr, sector
802802888
[16863.451680] blk_update_request: critical target error, dev sdr, sector
1609535456

Signed-off-by: Robert Elliott <elliott@...com>
Reviewed-by: Webb Scales <webbnh@...com>
---
 block/blk-core.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/block/blk-core.c b/block/blk-core.c
index c359d72..9c5a5b9 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -2450,8 +2450,8 @@ bool blk_update_request(struct request *req, int error, unsigned int nr_bytes)
 			error_type = "I/O";
 			break;
 		}
-		printk_ratelimited(KERN_ERR "end_request: %s error, dev %s, sector %llu\n",
-				   error_type, req->rq_disk ?
+		printk_ratelimited(KERN_ERR "%s: %s error, dev %s, sector %llu\n",
+				   __func__, error_type, req->rq_disk ?
 				   req->rq_disk->disk_name : "?",
 				   (unsigned long long)blk_rq_pos(req));
 

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