linux-kernel - Re: [PATCH] coredump: kill mm->core

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Message-ID: <20080720084758.GA143@tv-sign.ru>
Date:	Sun, 20 Jul 2008 12:47:58 +0400
From:	Oleg Nesterov <oleg@...sign.ru>
To:	Johannes Weiner <hannes@...urebad.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Roland McGrath <roland@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] coredump: kill mm->core_done

On 07/20, Johannes Weiner wrote:
> 
> Oleg Nesterov <oleg@...sign.ru> writes:
> 
> > --- 26-rc2/kernel/exit.c~5_KILL_CORE_DONE	2008-07-13 19:58:19.000000000 +0400
> > +++ 26-rc2/kernel/exit.c	2008-07-15 17:06:58.000000000 +0400
> > @@ -680,7 +680,13 @@ static void exit_mm(struct task_struct *
> >  		if (atomic_dec_and_test(&core_state->nr_threads))
> >  			complete(&core_state->startup);
> >  
> > -		wait_for_completion(&mm->core_done);
> > +		for (;;) {
> > +			set_task_state(tsk, TASK_UNINTERRUPTIBLE);
> > +			if (!self.task) /* see coredump_finish() */
> 
> kernel/exit.c: In function `exit_mm':
> kernel/exit.c:686: error: `self' undeclared (first use in this function)
> kernel/exit.c:686: error: (Each undeclared identifier is reported only once
> kernel/exit.c:686: error: for each function it appears in.)
> make[1]: *** [kernel/exit.o] Error 1

This is on top of other patches in -mm tree,

         coredump-zap_threads-comments-use-while_each_thread.patch
         introduce-pf_kthread-flag.patch
         kill-pf_borrowed_mm-in-favour-of-pf_kthread.patch
         coredump-zap_threads-must-skip-kernel-threads.patch
         coredump-elf_core_dump-skip-kernel-threads.patch
         coredump-turn-mm-core_startup_done-into-the-pointer-to-struct-core_state.patch
         coredump-move-mm-core_waiters-into-struct-core_state.patch
         coredump-simplify-core_state-nr_threads-calculation.patch
         coredump-turn-core_state-nr_threads-into-atomic_t.patch
         coredump-make-mm-core_state-visible-to-core_dump.patch
         coredump-construct-the-list-of-coredumping-threads-at-startup-time.patch
         coredump-elf_core_dump-use-core_state-dumper-list.patch
         coredump-elf_fdpic_core_dump-use-core_state-dumper-list.patch
         coredump-kill-mm-core_done.patch

Oleg.

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