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.
Signed-off-by: Yi Zou <yi....@intel.com>
Cc: www.Open-FCoE.org <devel@open-fcoe.org>
---
drivers/scsi/scsi_lib.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index b2c95db..e2128d9 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -934,7 +934,8 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int
good_bytes)
case ACTION_FAIL:
/* Give up and fail the remainder of the request */
scsi_release_buffers(cmd);
- if (!(req->cmd_flags & REQ_QUIET)) {
+ if (!(req->cmd_flags & REQ_QUIET) &&
+ printk_ratelimit()) {
if (description)
scmd_printk(KERN_INFO, cmd, "%s\n",
description);
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