Subject: Re: CVS commit: src/sys/arch/xen/xen
To: YAMAMOTO Takashi <email@example.com>
From: Manuel Bouyer <firstname.lastname@example.org>
Date: 10/03/2005 18:21:01
On Tue, Oct 04, 2005 at 12:10:20AM +0900, YAMAMOTO Takashi wrote:
> > > - as you defer ack until xennetback_tx_free and the mbuf can live ~forever,
> > > you can capture all buffers.
> > > (i think that linux netback has the same problem.)
> > I wondered about this. Can the kernel really grab a mbuf forever ? For
> > which reason ?
> eg. when an application never read from the socket.
Ha yes, I focused on network interfaces communications and forgot this
> > An easy fix would be to switch back to copy when we are low on buffers.
> yes, it can be a workaround.
As this is something that actually can (and will) happen, I'll look at
implementing this workaround.
Manuel Bouyer <email@example.com>
NetBSD: 26 ans d'experience feront toujours la difference