linux-kernel - Re: [patch] sched: fix b5d9d734 blunder in task_new

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 24 Nov 2009 18:35:40 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Mike Galbraith <efault@....de>
Cc:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [patch] sched: fix b5d9d734 blunder in task_new_fair()

On Tue, 2009-11-24 at 18:07 +0100, Mike Galbraith wrote:
> >       if (p->sched_class->task_new) {
> >               /* can detect migration through: task_cpu(p) != smp_processor_id() */
> 
> What if the parent was migrated before we got here?

Well, the only case it really matters for is the child_runs_first crap,
which is basically broken on SMP anyway, so I don't think we care too
much if we race here.

Unless I missed some detail that is ;-)

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/