497997bc60
We have observed unexpcted timeout when we remove LUNs from the active iSCSI target dynamically during FIO workload. By making destroy_raid_bdev RPC wait for its completion, we could know the destroy_raid_bdev RPC caused timeout because LUN hot removal didn't complete. By investigating the log, incoming I/Os from the host had not stopped even after hot removal process was started. The reason was that iSCSI target had continued to accept incoming I/Os from the host. By removing LUN from the SCSI device at the start of the LUN hot removal process, iSCSI target will be able to stop incoming I/Os and LUN hot removal will complete in finite time. LUN itself can be accessible even after it is removed from the SCSI device. LUN hot removal is for not I_T nexus but I_T_L nexus and so we cannot start connection exiting in this case because connection can have multiple LUNs. So this fix requires few changes and will be practical. Fixes #715 Change-Id: I17d7a1f6c6557297289c3bd148a62db46da48ec5 Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com> Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453959 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Changpeng Liu <changpeng.liu@intel.com> |
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| .. | ||
| dev.c | ||
| lun.c | ||
| Makefile | ||
| port.c | ||
| scsi_bdev.c | ||
| scsi_internal.h | ||
| scsi_rpc.c | ||
| scsi.c | ||
| task.c | ||