Re: [PATCH] vhost-scsi: flush backend after device ioctls

On Mon, Aug 03, 2026 at 07:02:43PM -0500, Mike Christie wrote:
> On 7/23/26 5:54 AM, Jia Jia wrote:
> > The owner must keep the old mappings valid until the ioctl returns.
> > Remapping or dropping them from another userspace thread before then is
> > outside the lifetime assumption of this transition barrier.
> 
> Ok I get it now. For some reason I thought that was valid.
> 
> For the patch we don't want to flush if vhost_dev_ioctl fails
> and there's no reason to flush for operations like
> VHOST_GET_FORK_FROM_OWNER or VHOST_SET_OWNER.
> 
> Could vhost_dev_ioctl return when a flush is needed?

I agree but also this is consistent with all other vhost
devices.

So I'm taking v2 of this, and we can iterate to optimize
all devices with patches on top.

-- 
MST