linux-kernel - Re: [PATCH] slow_work_thread() should do the exclusive wait

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Message-ID: <20090413214852.GA1127@redhat.com>
Date:	Mon, 13 Apr 2009 23:48:52 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	David Howells <dhowells@...hat.com>
Cc:	Trond Myklebust <Trond.Myklebust@...app.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Serge Hallyn <serue@...ibm.com>,
	Steve Dickson <steved@...hat.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Daire Byrne <Daire.Byrne@...mestore.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] slow_work_thread() should do the exclusive wait

On 04/13, David Howells wrote:
>
> Trond Myklebust <Trond.Myklebust@...app.com> wrote:
>
> > Should that really be TASK_INTERRUPTIBLE? I don't see anything obvious
> > in the enclosing for(;;) loop that checks for or handles signals...
>
> If it were TASK_UNINTERRUPTIBLE, it would sit there in the D-state when not
> doing anything.  I must admit, I thought I was calling daemonize(), but that
> seems to have got lost somewhere.

daemonize() is not needed, kthread_create() creates the kernel thread which
ignores all signals. So it doesn't matter which state we use to sleep,
TASK_INTERRUPTIBLE or TASK_UNINTERRUPTIBLE.

Oleg.

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