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Date: Mon, 18 May 2009 17:11:02 +0200
From: Ingo Molnar <mingo@elte.hu>
To: Oleg Nesterov <oleg@redhat.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>,
	Jonathan Corbet <corbet@lwn.net>, Martin Bammer <mrb74@gmx.at>,
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Subject: Re: 2.6.30-rc6: Reported regressions from 2.6.29
Message-ID: <20090518151102.GA6241@elte.hu>
References: <_AjETDMbIoL.A.DcH.RYzDKB@chimera> <20090517073327.GC1583@elte.hu> <20090518145725.GB18607@redhat.com>
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* Oleg Nesterov <oleg@redhat.com> wrote:

> On 05/17, Ingo Molnar wrote:
> >
> > > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=13107
> > > Subject		: LTP 20080131 causes defunct processes w/2.6.30-rc1
> > > Submitter	: Kumar Gala <galak@kernel.crashing.org>
> > > Date		: 2009-04-09 15:43 (38 days old)
> > > First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b3bfa0cba867f23365b81658b47efd906830879b
> > > References	: http://marc.info/?l=linux-kernel&m=123929187208953&w=4
> > > 		  http://lkml.org/lkml/2009/4/10/193
> > > Handled-By	: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
> >
> > Oleg says in that thread that it's as-designed, and followup
> > questions were not replied to (yet).
> 
> Yes, I think this is false alarm. Perhaps I missed something, and 
> I am waiting for more info from Kumar, but it looks like ltp was 
> already changed to skip the "{ PTRACE_ATTACH, 1, EPERM }" test on 
> kernels after 2.6.25

Btw., why did the patch (and the revert) make any difference to the 
test? Timing differences look improbable.

	Ingo