Re: [PATCH] virtio_ring: fix stalls for packed rings

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On 2019/10/28 下午2:59, Sasha Levin wrote:
Hi,

[This is an automated email]

This commit has been processed because it contains a -stable tag.
The stable tag indicates that it's relevant for the following trees: all

The bot has tested the following trees: v5.3.7, v4.19.80, v4.14.150, v4.9.197, v4.4.197.

v5.3.7: Build OK!
v4.19.80: Failed to apply! Possible dependencies:
     138fd25148638 ("virtio_ring: add _split suffix for split ring functions")
     1ce9e6055fa0a ("virtio_ring: introduce packed ring support")
     cbeedb72b97ad ("virtio_ring: allocate desc state for split ring separately")
     d79dca75c7968 ("virtio_ring: extract split ring handling from ring creation")
     e593bf9751566 ("virtio_ring: put split ring fields in a sub struct")
     e6f633e5beab6 ("virtio_ring: put split ring functions together")
     f51f982682e2a ("virtio_ring: leverage event idx in packed ring")
     fb3fba6b162aa ("virtio_ring: cache whether we will use DMA API")

v4.14.150: Failed to apply! Possible dependencies:
     138fd25148638 ("virtio_ring: add _split suffix for split ring functions")
     1ce9e6055fa0a ("virtio_ring: introduce packed ring support")
     cbeedb72b97ad ("virtio_ring: allocate desc state for split ring separately")
     d79dca75c7968 ("virtio_ring: extract split ring handling from ring creation")
     e593bf9751566 ("virtio_ring: put split ring fields in a sub struct")
     e6f633e5beab6 ("virtio_ring: put split ring functions together")
     f51f982682e2a ("virtio_ring: leverage event idx in packed ring")
     fb3fba6b162aa ("virtio_ring: cache whether we will use DMA API")

v4.9.197: Failed to apply! Possible dependencies:
     0c7eaf5930e14 ("virtio_ring: fix description of virtqueue_get_buf")
     138fd25148638 ("virtio_ring: add _split suffix for split ring functions")
     1ce9e6055fa0a ("virtio_ring: introduce packed ring support")
     44ed8089e991a ("scsi: virtio: Reduce BUG if total_sg > virtqueue size to WARN.")
     5a08b04f63792 ("virtio: allow extra context per descriptor")
     c60923cb9cb5e ("virtio_ring: fix complaint by sparse")
     cbeedb72b97ad ("virtio_ring: allocate desc state for split ring separately")
     e593bf9751566 ("virtio_ring: put split ring fields in a sub struct")
     e6f633e5beab6 ("virtio_ring: put split ring functions together")
     f51f982682e2a ("virtio_ring: leverage event idx in packed ring")
     fb3fba6b162aa ("virtio_ring: cache whether we will use DMA API")

v4.4.197: Failed to apply! Possible dependencies:
     0c7eaf5930e14 ("virtio_ring: fix description of virtqueue_get_buf")
     138fd25148638 ("virtio_ring: add _split suffix for split ring functions")
     1ce9e6055fa0a ("virtio_ring: introduce packed ring support")
     44ed8089e991a ("scsi: virtio: Reduce BUG if total_sg > virtqueue size to WARN.")
     5a08b04f63792 ("virtio: allow extra context per descriptor")
     780bc7903a32e ("virtio_ring: Support DMA APIs")
     c60923cb9cb5e ("virtio_ring: fix complaint by sparse")
     d26c96c810254 ("vring: Introduce vring_use_dma_api()")
     e6f633e5beab6 ("virtio_ring: put split ring functions together")
     f51f982682e2a ("virtio_ring: leverage event idx in packed ring")
     fb3fba6b162aa ("virtio_ring: cache whether we will use DMA API")


NOTE: The patch will not be queued to stable trees until it is upstream.

How should we proceed with this patch?


It is only needed for kernel > 4.20.

Thanks








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