similar to: [PATCHv7 0/3] vhost: a kernel-level virtio server

Rusty, ok, I think I've addressed your comments so far here. In particular I have added write logging for live migration, indirect buffers and virtio net header (enables gso). I'd like this to go into linux-next, through your tree, and hopefully 2.6.33. What do you think? --- This implements vhost: a kernel-level backend for virtio, The main motivation for this work is to reduce

Rusty, ok, I think I've addressed your comments so far here. In particular I have added write logging for live migration, indirect buffers and virtio net header (enables gso). I'd like this to go into linux-next, through your tree, and hopefully 2.6.33. What do you think? --- This implements vhost: a kernel-level backend for virtio, The main motivation for this work is to reduce

Ok, I think I've addressed all comments so far here, and it still seems to work :). Please take a look. I basically ended up accepting all Rusty's suggestions, except I did not get rid of avail_idx field in vq: I don't (yet?) understand what's wrong with it, if any, and it seems required for correct implementation of notify on empty. I tried adding comment where it's changed

Ok, I think I've addressed all comments so far here, and it still seems to work :). Please take a look. I basically ended up accepting all Rusty's suggestions, except I did not get rid of avail_idx field in vq: I don't (yet?) understand what's wrong with it, if any, and it seems required for correct implementation of notify on empty. I tried adding comment where it's changed

Ok, I think I've addressed all comments so far here. Rusty, I'd like this to go into linux-next, through your tree, and hopefully 2.6.33. What do you think? --- This implements vhost: a kernel-level backend for virtio, The main motivation for this work is to reduce virtualization overhead for virtio by removing system calls on data path, without guest changes. For virtio-net, this

Ok, I think I've addressed all comments so far here. Rusty, I'd like this to go into linux-next, through your tree, and hopefully 2.6.33. What do you think? --- This implements vhost: a kernel-level backend for virtio, The main motivation for this work is to reduce virtualization overhead for virtio by removing system calls on data path, without guest changes. For virtio-net, this

Rusty, ok, I think I've addressed your comments so far here. Coming next: - TSO - tap support Thanks! --- This implements vhost: a kernel-level backend for virtio, The main motivation for this work is to reduce virtualization overhead for virtio by removing system calls on data path, without guest changes. For virtio-net, this removes up to 4 system calls per packet: vm exit for kick,

Rusty, ok, I think I've addressed your comments so far here. Coming next: - TSO - tap support Thanks! --- This implements vhost: a kernel-level backend for virtio, The main motivation for this work is to reduce virtualization overhead for virtio by removing system calls on data path, without guest changes. For virtio-net, this removes up to 4 system calls per packet: vm exit for kick,

Rusty, could you review and comment on the patches please? Since most of the code deals with virtio from host side, I think it will make sense to merge them through your tree. What do you think? One comment on placement: I put files under a separate vhost directory to avoid confusion with virtio-net which runs in guest. Does this sound sane? If not let me know and I'll move them. Thanks!

Rusty, could you review and comment on the patches please? Since most of the code deals with virtio from host side, I think it will make sense to merge them through your tree. What do you think? One comment on placement: I put files under a separate vhost directory to avoid confusion with virtio-net which runs in guest. Does this sound sane? If not let me know and I'll move them. Thanks!

This implements vhost: a kernel-level backend for virtio, The main motivation for this work is to reduce virtualization overhead for virtio by removing system calls on data path, without guest changes. For virtio-net, this removes up to 4 system calls per packet: vm exit for kick, reentry for kick, iothread wakeup for packet, interrupt injection for packet. Some more detailed description attached

This implements vhost: a kernel-level backend for virtio, The main motivation for this work is to reduce virtualization overhead for virtio by removing system calls on data path, without guest changes. For virtio-net, this removes up to 4 system calls per packet: vm exit for kick, reentry for kick, iothread wakeup for packet, interrupt injection for packet. Some more detailed description attached

This implements vhost: a kernel-level backend for virtio, The main motivation for this work is to reduce virtualization overhead for virtio by removing system calls on data path, without guest changes. For virtio-net, this removes up to 4 system calls per packet: vm exit for kick, reentry for kick, iothread wakeup for packet, interrupt injection for packet. Some more detailed description attached

This implements vhost: a kernel-level backend for virtio, The main motivation for this work is to reduce virtualization overhead for virtio by removing system calls on data path, without guest changes. For virtio-net, this removes up to 4 system calls per packet: vm exit for kick, reentry for kick, iothread wakeup for packet, interrupt injection for packet. Some more detailed description attached

Switch the function documentation to kerneldoc comments, and add WARN_ON_ONCE asserts that the calling thread is a kernel thread and does not have ->mm set (or has ->mm set in the case of unuse_mm). Also give the functions a kthread_ prefix to better document the use case. Signed-off-by: Christoph Hellwig <hch at lst.de> Acked-by: Felix Kuehling <Felix.Kuehling at amd.com> ---

Switch the function documentation to kerneldoc comments, and add WARN_ON_ONCE asserts that the calling thread is a kernel thread and does not have ->mm set (or has ->mm set in the case of unuse_mm). Also give the functions a kthread_ prefix to better document the use case. Signed-off-by: Christoph Hellwig <hch at lst.de> --- drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h | 4 +--

vhost net module wants to do copy to/from user from a kernel thread, which needs use_mm (like what fs/aio has). Move that into mm/ and export to modules. Acked-by: Andrew Morton <akpm at linux-foundation.org> Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- fs/aio.c | 47 +---------------------------------- include/linux/mmu_context.h | 9 ++++++

vhost net module wants to do copy to/from user from a kernel thread, which needs use_mm (like what fs/aio has). Move that into mm/ and export to modules. Acked-by: Andrew Morton <akpm at linux-foundation.org> Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- fs/aio.c | 47 +---------------------------------- include/linux/mmu_context.h | 9 ++++++

vhost net module wants to do copy to/from user from a kernel thread, which needs use_mm (like what fs/aio has). Move that into mm/ and export to modules. Acked-by: Andrew Morton <akpm at linux-foundation.org> Acked-by: Andrea Arcangeli <aarcange at redhat.com> Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- fs/aio.c | 47

vhost net module wants to do copy to/from user from a kernel thread, which needs use_mm (like what fs/aio has). Move that into mm/ and export to modules. Acked-by: Andrew Morton <akpm at linux-foundation.org> Acked-by: Andrea Arcangeli <aarcange at redhat.com> Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- fs/aio.c | 47