OpenCloudOS-Kernel/drivers/scsi/ibmvscsi
Brian King 62fa3ce05d scsi: ibmvfc: Avoid path failures during live migration
Fix an issue reported when performing a live migration when multipath is
configured with a short fast fail timeout of 5 seconds and also to have
no_path_retry set to fail. In this scenario, all paths would go into the
devloss state while the ibmvfc driver went through discovery to log back
in. On a loaded system, the discovery might take longer than 5 seconds,
which was resulting in all paths being marked failed, which then resulted
in a read only filesystem.

This patch changes the migration code in ibmvfc to avoid deleting rports at
all in this scenario, so we avoid losing all paths.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Link: https://lore.kernel.org/r/20221026181356.148517-1-brking@linux.vnet.ibm.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2022-11-07 18:57:39 +00:00
..
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
ibmvfc.c scsi: ibmvfc: Avoid path failures during live migration 2022-11-07 18:57:39 +00:00
ibmvfc.h scsi: ibmvfc: Store vhost pointer during subcrq allocation 2022-06-16 21:42:04 -04:00
ibmvscsi.c SCSI misc on 20211105 2021-11-05 08:42:02 -07:00
ibmvscsi.h SCSI misc on 20190709 2019-07-11 15:14:01 -07:00