linux-kernel - Re: 2.6.23-rc3-mm1 - vdso and gettimeofday issues with glibc

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Date:	Sat, 08 Sep 2007 20:24:09 -0400
From:	Valdis.Kletnieks@...edu
To:	Chuck Ebbert <cebbert@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, jakub@...hat.com,
	Ulrich Drepper <drepper@...hat.com>,
	linux-kernel@...r.kernel.org, Andi Kleen <ak@...e.de>
Subject: Re: 2.6.23-rc3-mm1 - vdso and gettimeofday issues with glibc

On Thu, 30 Aug 2007 12:27:10 EDT, Chuck Ebbert said:
> On 08/29/2007 07:15 PM, Andrew Morton wrote:
> >>> The issue:  vdso and gettimeofday seem to be having a quarrel.
> >> This is also open as a Fedora bug:
> >> https://bugzilla.redhat.com/show_bug.cgi?id=262481
> >>
> > 
> > So it's an interaction between the x86_64 vdso patches in Andi's tree and 
> > newer glibc, and we don't know which one is getting it wrong yet?
> > 
> > If I ever get another -mm out the door (have been without electricity for
> > several days) I'll drop the vdso changes until this is sorted out.
> > -
> 
> Problem is present in stock 2.6.23-rc too. Still don't know whether it is
> the new glibc code or the vdso that's causing it, though.

Updating on this issue:   Both myself and another person have reported on
the RedHat bugzilla that it's a clocksource issue - if you are using the
hpet clocksource, the time warps, but booting with clocksource=acpi_pm works.

This ring any bells?


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