Messages in this thread | | | Date | Tue, 14 Jun 2022 23:21:53 -0700 | From | Christoph Hellwig <> | Subject | Re: [PATCH -next] blk-mq: fix boot time regression for scsi drives with multiple hctx |
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On Tue, Jun 14, 2022 at 09:15:36PM +0800, Yu Kuai wrote: > > for making so long, so I guess there must be other delay added by the feature > > of BLK_MQ_F_TAG_HCTX_SHARED. > > Please see details in the reasons 2), scsi scan will call > __scsi_remove_device() a lot of times(each host, each channel, each > target).
Well, if the SCSI core does that you are falling back to a sequentical scan instad of using REPORT LUNS. Which seems like a bug on its own that is worth investigation.
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