Messages in this thread |  | | From | Wenchao Hao <> | Subject | [REQUEST DISCUSS]: speed up SCSI error handle for host with massive devices | Date | Tue, 29 Mar 2022 17:06:30 +0800 |
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SCSI timeout would call scsi_eh_scmd_add() on some conditions, host would be set to SHOST_RECOVERY state. Once host enter SHOST_RECOVERY, IOs submitted to all devices in this host would not succeed until the scsi_error_handler() finished. The scsi_error_handler() might takes long time to be done, it's unbearable when host has massive devices.
I want to ask is anyone applying another error handler flow to address this phenomenon?
I think we can move some operations(like scsi get sense, scsi send startunit and scsi device reset) out of scsi_unjam_host(), to perform these operations without setting host to SHOST_RECOVERY? It would reduce the time of block the whole host.
Waiting for your discussion.
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