+ scsi mailing list > On Mon, 18 Oct 2021 17:41:23 +0800, John Garry wrote: > > Since it is now possible for a tagset to share a single set of tags, > > the iter function should not re-iter the tags for the count of #hw > > queues in that case. Rather it should just iter once. John - Recently we found issue of error hander thread never kicked off and this patch fix the issue. Without this patch, scsi error hander will not find correct host_busy counter. Take one simple case. There is one IO outstanding and that is getting timedout. Now SML wants to wake up EH thread only if, below condition met "scsi_host_busy(shost) == shost->host_failed" Without this patch, shared host tag enabled meagaraid_sas driver will find host_busy = actual outstanding * nr_hw_queues. Error handler thread will never be kicked-off. This patch is mandatory for fixing shared host tag feature and require to be part of stable kernel. Do you need more data for posting to stable kernel ? Kashyap > > > > > > Applied, thanks! > > [1/1] blk-mq: Fix blk_mq_tagset_busy_iter() for shared tags > commit: 0994c64eb4159ba019e7fedc7ba0dd6a69235b40 > > Best regards, > -- > Jens Axboe >
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