From: Jeff Dike <jdike@addtoit.com>
To: Nuutti Kotivuori <naked@iki.fi>
Cc: user-mode-linux-devel@lists.sourceforge.net,
McGroarty <mcgroarty@gmail.com>
Subject: Re: [uml-devel] Re: UML tuntap driver problem with queueing
Date: Tue, 08 Feb 2005 19:17:39 -0500 [thread overview]
Message-ID: <200502090017.j190Hds0014277@ccure.user-mode-linux.org> (raw)
In-Reply-To: Your message of "Tue, 08 Feb 2005 21:37:06 +0200." <87zmyej125.fsf@aka.i.naked.iki.fi>
naked@iki.fi said:
> ust a heads up here to the UML folks in case it was missed - with the
> current code, packet delivery to UML machines using tuntap driver
> *will* mess up (stall totally or major bursts of lag) if more than 10
> packets are queued to UML at a time.
It wasn't missed. Someone else posted
(http://marc.theaimsgroup.com/?l=user-mode-linux-user&m=110752781409419&w=2)
that networking freezes until a character is typed on the console.
This is a clear sign of the SIGIO missing some traffic and letting it sit
on the host until some other IO happens.
> Ofcourse, the actual cause for this should be fixed (SIGIO mess up or
> whatever it is).
Yup. It does look like there's some sort of race in the SIGIO handler.
Jeff
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prev parent reply other threads:[~2005-02-08 22:29 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-02-04 12:06 [uml-devel] UML tuntap driver problem with queueing Nuutti Kotivuori
2005-02-08 19:37 ` [uml-devel] " Nuutti Kotivuori
2005-02-09 0:17 ` Jeff Dike [this message]
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