Re: futex strangeness in 2.6.23-mm1/UML

From: Andrew Morton
Date: Tue Oct 23 2007 - 12:02:36 EST


On Tue, 23 Oct 2007 09:52:08 -0400 Rik van Riel <riel@xxxxxxxxxx> wrote:

> On Tue, 23 Oct 2007 12:55:44 +0400
> Pavel Emelyanov <xemul@xxxxxxxxxx> wrote:
>
> > I look at the 2.6.23-mm1 and see that there's one hunk lost. This
> > is the one Oleg re-sent some days ago (the mail thread subject was
> > 2.6.23-mm1 thread exit_group issue). Here it is (sent 13 oct 2007):
> >
> > --- kernel/fork.c~ 2007-10-13 15:41:35.000000000 +0400
> > +++ kernel/fork.c 2007-10-13 15:41:41.000000000 +0400
> > @@ -1443,6 +1443,9 @@ long do_fork(unsigned long clone_flags,
> > task_pid_nr_ns(p, current->nsproxy->pid_ns) :
> > task_pid_vnr(p);
> >
> > + if (clone_flags & CLONE_PARENT_SETTID)
> > + put_user(nr, parent_tidptr);
> > +
> > if (clone_flags & CLONE_VFORK) {
> > p->vfork_done = &vfork;
> > init_completion(&vfork);
> >
> > Please, try with this patch.
>
> The patch above fixes the issue for me.
>
> Autofs works again as expected.

argh. Sorry guys, I'd completely forgotten that that bug was present in
-mm1 and I didn't upload the fix into hot-fixes/. Bad me.
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