Re: [PATCH] xen-hvm: Allow disabling buffer_io_timer

[Anthony PERARD <anthony.perard@citrix.com>]

On Wed, Jan 26, 2022 at 01:47:20PM +0000, Durrant, Paul wrote:
> On 26/01/2022 13:43, Jason Andryuk wrote:
> > On Tue, Dec 14, 2021 at 8:40 AM Durrant, Paul <xadimgnik@gmail.com> wrote:
> > > 
> > > On 10/12/2021 11:34, Jason Andryuk wrote:
> > > > commit f37f29d31488 "xen: slightly simplify bufioreq handling" hard
> > > > coded setting req.count = 1 during initial field setup before the main
> > > > loop.  This missed a subtlety that an early exit from the loop when
> > > > there are no ioreqs to process, would have req.count == 0 for the return
> > > > value.  handle_buffered_io() would then remove state->buffered_io_timer.
> > > > Instead handle_buffered_iopage() is basically always returning true and
> > > > handle_buffered_io() always re-setting the timer.
> > > > 
> > > > Restore the disabling of the timer by introducing a new handled_ioreq
> > > > boolean and use as the return value.  The named variable will more
> > > > clearly show the intent of the code.
> > > > 
> > > > Signed-off-by: Jason Andryuk <jandryuk@gmail.com>
> > > 
> > > Reviewed-by: Paul Durrant <paul@xen.org>
> > 
> > Thanks, Paul.
> > 
> > What is the next step for getting this into QEMU?
> > 
> 
> Anthony, can you queue this?

Yes, I'll send a pull request soon.

Sorry I tend to wait a while before preparing pull requests, especially
when there's only one patch. But there's another one now.

Cheers,

-- 
Anthony PERARD