Re: [Qemu-devel] [PATCH v4 for-4.0 0/7] vhost-user-blk: Add support for backend reconnecting

[Stefan Hajnoczi]

On Wed, Jan 09, 2019 at 07:27:21PM +0800, address@hidden wrote:
> From: Xie Yongji <address@hidden>
> 
> This patchset is aimed at supporting qemu to reconnect
> vhost-user-blk backend after vhost-user-blk backend crash or
> restart.
> 
> The patch 1 uses exisiting wait/nowait options to make QEMU not
> do a connect on client sockets during initialization of the chardev.
> 
> The patch 2 introduces two new messages VHOST_USER_GET_INFLIGHT_FD
> and VHOST_USER_SET_INFLIGHT_FD to support providing shared
> memory to backend.

Can you describe the problem that the inflight I/O shared memory region
solves?

Thanks,
Stefan

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