Commit 76e33fe4e2c43 ("dm mpath: reinstate bio-based support") was
included in Linux 4.8. Not sure how you missed this.
On Thu, Nov 03 2016 at 9:07pm -0400,
tang.junhui@xxxxxxxxxx <tang.junhui@xxxxxxxxxx> wrote:
> Hello Mike,
>
> I used the master branch, the code seems a little older,
> It's true that the newer branches such as dm-4.10 have reused
> kmultipathd.
>
> Thanks,
> Tang
>
>
>
> 发件人: Mike Snitzer <snitzer@xxxxxxxxxx>
> 收件人: tang.junhui@xxxxxxxxxx,
> 抄送: zhang.kai16@xxxxxxxxxx, dm-devel@xxxxxxxxxx, agk@xxxxxxxxxx
> 日期: 2016/11/03 22:57
> 主题: Re: dm mpath: remove unusable kmultipathd work queue
> 发件人: dm-devel-bounces@xxxxxxxxxx
>
>
>
> On Thu, Nov 03 2016 at 6:29am -0400,
> tang.junhui@xxxxxxxxxx <tang.junhui@xxxxxxxxxx> wrote:
>
> > From: "tang.junhui" <tang.junhui@xxxxxxxxxx>
> >
> > kmultipathd work queue is used to process queued IOs for multipath
> > target when IOs need to retry, but now these IOs have been requeued
> > to block queue of DM device, hence this work queue is not useful
> > anymore, and this patch deletes it.
> >
> > Signed-off-by: tang.junhui <tang.junhui@xxxxxxxxxx>
>
> Nack, you must be looking at older code. bio-based DM multipath makes
> use of kmultipathd.
>
> When suggesting changes please always make sure you're working with the
> latest upstream Linux code.
>
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>
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