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block: blk-core: add printk_ratelimit 

On failure of requests the console is flooded with prints,
which result in a watchdog bark.
This patch limits the number of prints to console thus, avoiding
the bark.

CRs-Fixed: 458071
Change-Id: I614002cc1305ab7b5c6a64d278139291c1baa3c4
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
This commit is contained in:
Asutosh Das 2013-03-07 17:43:35 +05:30 committed by Zhao Wei Liew
parent 47dcd903ff
commit e70d823f63
1 changed files with 6 additions and 3 deletions
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9
block/blk-core.c
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@ -29,6 +29,7 @@
#include <linux/fault-inject.h>
#include <linux/list_sort.h>
#include <linux/delay.h>
#include <linux/ratelimit.h>
#define CREATE_TRACE_POINTS
#include <trace/events/block.h>
@ -2141,9 +2142,11 @@ bool blk_update_request(struct request *req, int error, unsigned int nr_bytes)
error_type = "I/O";
break;
}
printk(KERN_ERR "end_request: %s error, dev %s, sector %llu\n",
error_type, req->rq_disk ? req->rq_disk->disk_name : "?",
(unsigned long long)blk_rq_pos(req));
printk_ratelimited(
KERN_ERR "end_request: %s error, dev %s, sector %llu\n",
error_type,
req->rq_disk ? req->rq_disk->disk_name : "?",
(unsigned long long)blk_rq_pos(req));
}
blk_account_io_completion(req, nr_bytes);