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Date: Fri, 10 Aug 2018 20:32:28 +0200
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Felipe Franciosi <felipe@nutanix.com>
Cc: Ming Lei <ming.lei@redhat.com>,
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Subject: Re: Fix for 84676c1f (b5b6e8c8) missing in 4.14.y
Message-ID: <20180810183228.GB18728@kroah.com>
References: <53EA26B1-86F8-40BF-A128-33137217A3F9@nutanix.com>
 <20180810023128.GB2816@ming.t460p>
 <20180810101541.GB31002@kroah.com>
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On Fri, Aug 10, 2018 at 05:10:52PM +0000, Felipe Franciosi wrote:
> 
> > On 10 Aug 2018, at 03:15, Greg Kroah-Hartman <gregkh@linuxfoundation.org> wrote:
> > 
> > On Fri, Aug 10, 2018 at 10:31:29AM +0800, Ming Lei wrote:
> >> On Fri, Aug 10, 2018 at 02:09:01AM +0000, Felipe Franciosi wrote:
> >>> Hi Ming (and all),
> >>> 
> >>> Your series "scsi: virtio_scsi: fix IO hang caused by irq vector automatic affinity" which forces virtio-scsi to use blk-mq fixes an issue introduced by 84676c1f. We noticed that this bug also exists in 4.14.y (as ef86f3a72adb), but your series was not backported to that stable branch.
> >>> 
> >>> Are there any plans to do that? At least CoreOS is using 4.14 and showing issues on AHV (which provides an mq virtio-scsi controller).
> >>> 
> >> 
> >> Hi Felipe,
> >> 
> >> Looks the following 4 patches should have been marked as stable, sorry
> >> for missing that.
> >> 
> >> b5b6e8c8d3b4 scsi: virtio_scsi: fix IO hang caused by automatic irq vector affinity
> >> 2f31115e940c scsi: core: introduce force_blk_mq
> >> adbe552349f2 scsi: megaraid_sas: fix selection of reply queue
> >> 8b834bff1b73 scsi: hpsa: fix selection of reply queue
> >> 
> >> Usually this backporting is done by our stable guys, so I will CC stable
> >> and leave them handle it, but I am happy to provide any help for
> >> addressing conflicts or sort of thing.
> > 
> > As the above patches do not apply "cleanly" to the 4.14.y tree at all,
> > can you please provide a set of backported patches that I can apply?
> 
> Actually, adbe552349f2 is already present in 4.14.y. It is commit e58114824fa6.
> 
> If you skip that, all the other three apply cleanly.

Ok, that works, but there's another bug report of aacraid having
problems.  Any ideas?

greg k-h