Re: 2.6.30-rc6: Reported regressions from 2.6.29

Ingo Molnar
2009-05-18T15:11:02Z

* 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