[dm-devel] [PATCH v2 32/48] multipathd: uxlsnr: use poll loop for sending, too

[Martin Wilck]

On Wed, 2021-11-24 at 19:43 -0600, Benjamin Marzinski wrote:
> On Thu, Nov 18, 2021 at 11:58:24PM +0100, mwilck at suse.com wrote:
> > From: Martin Wilck <mwilck at suse.com>
> > 
> > send_packet() may busy-loop. By polling for POLLOUT, we can
> > avoid that, even if it's very unlikely in practice.
> > 
> 
> The last time I reviewed this, I mentioned that when we fall through
> from CLT_WORK to CLT_SEND, the client hasn't checked for a POLLOUT
> revent, so it's possible to block here. I'm not sure that we care.

Fixing that will be as easy as entering as returning once from the
state machine. I'll add the fix.

Martin