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

Halil Pasic
2020-02-13T12:37:56Z

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