lkml.org 
[lkml]   [2022]   [Mar]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[REQUEST DISCUSS]: speed up SCSI error handle for host with massive devices
Date
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.

\
 
 \ /
  Last update: 2022-03-29 11:07    [W:0.076 / U:1.524 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site