linux-kernel - Re: [PATCH repost] sched: export sched

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Message-ID: <20100726180834.GA26988@redhat.com>
Date:	Mon, 26 Jul 2010 20:08:34 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Sridhar Samudrala <sri@...ibm.com>
Cc:	"Michael S. Tsirkin" <mst@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Tejun Heo <tj@...nel.org>, Ingo Molnar <mingo@...e.hu>,
	netdev <netdev@...r.kernel.org>,
	lkml <linux-kernel@...r.kernel.org>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dmitri Vorobiev <dmitri.vorobiev@...ial.com>,
	Jiri Kosina <jkosina@...e.cz>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH repost] sched: export sched_set/getaffinity to modules

On 07/26, Sridhar Samudrala wrote:
>
> I have been testing out a similar patch that uses kernel_thread() without CLONE_FILES
> flag rather than create_kthread() and then closing the files.

!CLONE_FILES can't help. copy_files() does dup_fd() in this case.
The child still inherits the files.

> Either version should be fine.

I think neither version is fine ;)

exit_files() is not enough too. How about the signals, reparenting?


I already forgot all details, probably I missed somethig. But it
seems to me that it is better to just export get/set affinity and
forget about all complications.

Oleg.

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