RE: 答复: [iscsi] Deadlock occurred when network is in error

From	"Tangchen (UVP)" <tang.chen@huawei.com>
Newsgroups	linux.kernel
Subject	RE: 答复: [iscsi] Deadlock occurred when network is in error
Date	2017-08-16 05:10 +0200
Message-ID	<ueWSt-1ER-1@gated-at.bofh.it> (permalink)
References	<uelJg-3wX-13@gated-at.bofh.it> <uepjQ-5KP-7@gated-at.bofh.it> <uezCx-3JS-7@gated-at.bofh.it> <ueRSN-6La-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

> On Tue, 2017-08-15 at 02:16 +0000, Tangchen (UVP) wrote:
> > But I'm not using mq, and I run into these two problems in a non-mq system.
> > The patch you pointed out is fix for mq, so I don't think it can resolve this
> problem.
> >
> > IIUC, mq is for SSD ?  I'm not using ssd, so mq is disabled.
> 
> Hello Tangchen,
> 
> Please post replies below the original e-mail instead of above - that is the reply
> style used on all Linux-related mailing lists I know of. From
> https://en.wikipedia.org/wiki/Posting_style:
> 
> A: Because it messes up the order in which people normally read text.
> Q: Why is top-posting such a bad thing?
> A: Top-posting.
> Q: What is the most annoying thing in e-mail?

Hi Bart,

Thanks for the reply. Will post the reply in e-mail. :)

> 
> Regarding your question: sorry but I quoted the wrong commit in my previous
> e-mail. The commit I should have referred to is 255ee9320e5d ("scsi: Make
> __scsi_remove_device go straight from BLOCKED to DEL"). That patch not only
> affects scsi-mq but also the single-queue code in the SCSI core.

OK, I'll try this one. Thx.

> 
> blk-mq/scsi-mq was introduced for SSDs but is not only intended for SSDs.
> The plan is to remove the blk-sq/scsi-sq code once the blk-mq/scsi-mq code
> works at least as fast as the single queue code for all supported devices.
> That includes hard disks.

OK, thanks for tell me this.

> 
> Bart.

Back to linux.kernel | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

[iscsi] Deadlock occurred when network is in error "Tangchen (UVP)" <tang.chen@huawei.com> - 2017-08-14 13:30 +0200
  Re: [iscsi] Deadlock occurred when network is in error Bart Van Assche <Bart.VanAssche@wdc.com> - 2017-08-14 17:20 +0200
    答复: [iscsi] Deadlock occurred when network is in error "Tangchen (UVP)" <tang.chen@huawei.com> - 2017-08-15 04:20 +0200
      Re: 答复: [iscsi] Deadlock occurred when network is in error Bart Van Assche <Bart.VanAssche@wdc.com> - 2017-08-15 23:50 +0200
        RE: 答复: [iscsi] Deadlock occurred when network is in error "Tangchen (UVP)" <tang.chen@huawei.com> - 2017-08-16 05:10 +0200

csiph-web