search for: eonspc

...to ensure that the queue will get started again. > In case of global resource outage (-ENOMEM because mapping failure, > because of swiotlb full) our virtqueue may be empty and we can get > stuck with a stopped hw_queue. > > Let us not stop the queue on arbitrary errors, but only on -EONSPC which > indicates a full virtqueue, where the hw_queue is guaranteed to get > started by virtblk_done() before when it makes sense to carry on > submitting requests. Let us also remove a stale comment. The generic solution may be to stop queue only when there is any in-flight request not...

...to ensure that the queue will get started again. > In case of global resource outage (-ENOMEM because mapping failure, > because of swiotlb full) our virtqueue may be empty and we can get > stuck with a stopped hw_queue. > > Let us not stop the queue on arbitrary errors, but only on -EONSPC which > indicates a full virtqueue, where the hw_queue is guaranteed to get > started by virtblk_done() before when it makes sense to carry on > submitting requests. Let us also remove a stale comment. The generic solution may be to stop queue only when there is any in-flight request not...

...gt; > > In case of global resource outage (-ENOMEM because mapping failure, > > > because of swiotlb full) our virtqueue may be empty and we can get > > > stuck with a stopped hw_queue. > > > > > > Let us not stop the queue on arbitrary errors, but only on -EONSPC which > > > indicates a full virtqueue, where the hw_queue is guaranteed to get > > > started by virtblk_done() before when it makes sense to carry on > > > submitting requests. Let us also remove a stale comment. > > > > The generic solution may be to stop qu...

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):

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):

...o ensure that the queue will get started again. > In case of global resource outage (-ENOMEM because mapping failure, > because of swiotlb full) our virtqueue may be empty and we can get > stuck with a stopped hw_queue. > > Let us not stop the queue on arbitrary errors, but only on -EONSPC which > indicates a full virtqueue, where the hw_queue is guaranteed to get > started by virtblk_done() before when it makes sense to carry on > submitting requests. Let us also remove a stale comment. > > Signed-off-by: Halil Pasic <pasic at linux.ibm.com> > Cc: Jens Axboe...

...necessarily sufficient to ensure that the queue will get started again. In case of global resource outage (-ENOMEM because mapping failure, because of swiotlb full) our virtqueue may be empty and we can get stuck with a stopped hw_queue. Let us not stop the queue on arbitrary errors, but only on -EONSPC which indicates a full virtqueue, where the hw_queue is guaranteed to get started by virtblk_done() before when it makes sense to carry on submitting requests. Let us also remove a stale comment. Signed-off-by: Halil Pasic <pasic at linux.ibm.com> Cc: Jens Axboe <axboe at kernel.dk> Fi...

...will get started again. > > In case of global resource outage (-ENOMEM because mapping failure, > > because of swiotlb full) our virtqueue may be empty and we can get > > stuck with a stopped hw_queue. > > > > Let us not stop the queue on arbitrary errors, but only on -EONSPC which > > indicates a full virtqueue, where the hw_queue is guaranteed to get > > started by virtblk_done() before when it makes sense to carry on > > submitting requests. Let us also remove a stale comment. > > The generic solution may be to stop queue only when there is a...