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authorEwan D. Milne <emilne@redhat.com>2020-03-11 17:39:30 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2020-03-12 06:09:27 +0300
commitb0962c53bde9a485c8ebc401fa1dbe821a76bc3e (patch)
treed213766f82a9f2647832fab78c4f980e1bae96a3 /include/scsi
parentdade67f4a5277b3dbb375e537f088ee4a8e8bf4e (diff)
downloadlinux-b0962c53bde9a485c8ebc401fa1dbe821a76bc3e.tar.xz
scsi: core: avoid repetitive logging of device offline messages
Large queues of I/O to offline devices that are eventually submitted when devices are unblocked result in a many repeated "rejecting I/O to offline device" messages. These messages can fill up the dmesg buffer in crash dumps so no useful prior messages remain. In addition, if a serial console is used, the flood of messages can cause a hard lockup in the console code. Introduce a flag indicating the message has already been logged for the device, and reset the flag when scsi_device_set_state() changes the device state. Link: https://lore.kernel.org/r/20200311143930.20674-1-emilne@redhat.com Reviewed-by: Bart van Assche <bvanassche@acm.org> Signed-off-by: Ewan D. Milne <emilne@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'include/scsi')
-rw-r--r--include/scsi/scsi_device.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 579e24c92f2f..c3cba2aaf934 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -203,6 +203,9 @@ struct scsi_device {
unsigned unmap_limit_for_ws:1; /* Use the UNMAP limit for WRITE SAME */
unsigned rpm_autosuspend:1; /* Enable runtime autosuspend at device
* creation time */
+
+ bool offline_already; /* Device offline message logged */
+
atomic_t disk_events_disable_depth; /* disable depth for disk events */
DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */