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| author | Yi Zou <yi.zou@intel.com> | 2012-08-30 16:26:25 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2012-08-30 16:26:25 -0700 |
| commit | 37d7b34f05b7bcca364bdf47d8955e766094a244 (patch) | |
| tree | ab1ae9d7b1f92212f7b19f819683c4d6a510d71c /block/blk-core.c | |
| parent | 155e36d40cf31c17f2b629fc2f2f5527e4cfc324 (diff) | |
| download | linux-37d7b34f05b7bcca364bdf47d8955e766094a244.tar.gz linux-37d7b34f05b7bcca364bdf47d8955e766094a244.tar.bz2 linux-37d7b34f05b7bcca364bdf47d8955e766094a244.zip | |
block: rate-limit the error message from failing commands
When performing a cable pull test w/ active stress I/O using fio over
a dual port Intel 82599 FCoE CNA, w/ 256LUNs on one port and about 32LUNs
on the other, it is observed that the system becomes not usable due to
scsi-ml being busy printing the error messages for all the failing commands.
I don't believe this problem is specific to FCoE and these commands are
anyway failing due to link being down (DID_NO_CONNECT), just rate-limit
the messages here to solve this issue.
v2->v1: use __ratelimit() as Tomas Henzl mentioned as the proper way for
rate-limit per function. However, in this case, the failed i/o gets to
blk_end_request_err() and then blk_update_request(), which also has to
be rate-limited, as added in the v2 of this patch.
v3-v2: resolved conflict to apply on current 3.6-rc3 upstream tip.
Signed-off-by: Yi Zou <yi.zou@intel.com>
Cc: www.Open-FCoE.org <devel@open-fcoe.org>
Cc: Tomas Henzl <thenzl@redhat.com>
Cc: <linux-scsi@vger.kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-core.c')
| -rw-r--r-- | block/blk-core.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 4b4dbdfbca89..ee3cb3a5e278 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -2254,9 +2254,11 @@ 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); |