linux-kernel - Re: [PATCH] worker_thread: don't play with SIGCHLD

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Message-ID: <20070413134046.GA180@tv-sign.ru>
Date:	Fri, 13 Apr 2007 17:40:46 +0400
From:	Oleg Nesterov <oleg@...sign.ru>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] worker_thread: don't play with SIGCHLD

On 04/13, Eric W. Biederman wrote:
>
> Oleg Nesterov <oleg@...sign.ru> writes:
> 
> > depends on Eric's
> >
> > 	kthread-dont-depend-on-work-queues-take-2.patch
> >
> > worker_thread() inherits ignored SIGCHLD from its parent, kthreadd.
> > We can remove unneeded do_sigaction().
> 
> Acked-by: "Eric W. Biederman" <ebiederm@...ssion.com>
> 
> Looks good.
> 
> We could delete all of:
> 
> > 	set_user_nice(current, -5);
> > 
> > 	/* Block and flush all signals */
> > 	sigfillset(&blocked);
> > 	sigprocmask(SIG_BLOCK, &blocked, NULL);
> > 	flush_signals(current);

this one is already deleted in -mm...

> > 	/*
> > 	 * We inherited MPOL_INTERLEAVE from the booting kernel.
> > 	 * Set MPOL_DEFAULT to insure node local allocations.
> > 	 */
> > 	numa_default_policy();

Yes, I forgot about this!

> If we wanted to, as that all comes by default from kthreadd.

Thanks, will send an update.

Oleg.

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