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

Stefan Hajnoczi
2020-02-19T17:58:08Z

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On Thu, Feb 13, 2020 at 01:37:26PM +0100, Halil Pasic 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
> --
> 2.17.1
>

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

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