netdev - Re: 2.6.31-rc2: Reported regressions from 2.6.30

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Date:	Fri, 10 Jul 2009 04:10:37 +0200
From:	Andres Freund <andres@...razel.de>
To:	John Dykstra <john.dykstra1@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Eric Sesterhenn <eric.sesterhenn@...xperts.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Adrian Bunk <bunk@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Natalie Protasevich <protasnb@...il.com>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Network Development <netdev@...r.kernel.org>,
	Linux ACPI <linux-acpi@...r.kernel.org>,
	Linux PM List <linux-pm@...ts.linux-foundation.org>,
	Linux SCSI List <linux-scsi@...r.kernel.org>,
	Linux Wireless List <linux-wireless@...r.kernel.org>,
	DRI <dri-devel@...ts.sourceforge.net>
Subject: Re: 2.6.31-rc2: Reported regressions from 2.6.30

Hi John, Hi Rafael,

On Friday 10 July 2009 03:46:57 John Dykstra wrote:
> On Tue, 2009-07-07 at 03:25 +0200, Andres Freund wrote:
> > There is also http://lkml.org/lkml/2009/6/30/398 : Soft-Lockup/Race
> > in
> > networking in 2.6.31-rc1+195 (possibly caused by netem)
>
> There is some similarity between this soft lockup and the one reported
> in http://www.spinics.net/lists/netdev/msg100957.html.  In both, the
> process is doing both sends and receives on raw sockets.
The issue turned out to be a hrtimer bug - i dont see anything like it in your 
trace. If you still want to test the fix, its 
de907e8432b08f2d5966c36e0747e97c0e596810 in -tip (or 
http://lkml.org/lkml/2009/7/9/150)

Rafael: In case youre reading this, I guess you can mark that bug as resolved.

Andres
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