linux-kernel - Re: [PATCH 0/2] virtio-blk: improve handling of DMA mapping failures

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Date:   Tue, 3 Mar 2020 09:49:21 -0500
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Halil Pasic <pasic@...ux.ibm.com>
Cc:     Jason Wang <jasowang@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        Jens Axboe <axboe@...nel.dk>,
        virtualization@...ts.linux-foundation.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-s390@...r.kernel.org,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Viktor Mihajlovski <mihajlov@...ux.ibm.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Ram Pai <linuxram@...ibm.com>,
        Thiago Jung Bauermann <bauerman@...ux.ibm.com>,
        "Lendacky, Thomas" <Thomas.Lendacky@....com>
Subject: Re: [PATCH 0/2] virtio-blk: improve handling of DMA mapping failures

On Tue, Mar 03, 2020 at 03:12:52PM +0100, Halil Pasic wrote:
> On Thu, 13 Feb 2020 13:37:26 +0100
> Halil Pasic <pasic@...ux.ibm.com> wrote:
> 
> > Two patches are handling new edge cases introduced by doing DMA mappings
> > (which can fail) in virtio core.
> > 
> > I stumbled upon this while stress testing I/O for Protected Virtual
> > Machines. I deliberately chose a tiny swiotlb size and have generated
> > load with fio. With more than one virtio-blk disk in use I experienced
> > hangs.
> > 
> > The goal of this series is to fix those hangs.
> > 
> > Halil Pasic (2):
> >   virtio-blk: fix hw_queue stopped on arbitrary error
> >   virtio-blk: improve virtqueue error to BLK_STS
> > 
> >  drivers/block/virtio_blk.c | 17 ++++++++++++-----
> >  1 file changed, 12 insertions(+), 5 deletions(-)
> > 
> > 
> > base-commit: 39bed42de2e7d74686a2d5a45638d6a5d7e7d473
> 
> ping
> 
> Hi Michael, hi Jason,
> 
> I got some favorable reviews for this, but AFAIK I got nothing form the
> maintainers yet.
> 
> Is some of you going to pick these?
> 
> Regards,
> Halil

I've queued this, thanks!