linux-kernel - Re: [PATCH 0/3] (Was: fput: task_work_add() can fail if the caller has passed exit_task

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Message-ID: <20130615174657.GA15550@redhat.com>
Date:	Sat, 15 Jun 2013 19:46:57 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Al Viro <viro@...iv.linux.org.uk>,
	Andrey Vagin <avagin@...nvz.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	David Howells <dhowells@...hat.com>,
	linux-kernel@...r.kernel.org, Huang Ying <ying.huang@...el.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH 0/3] (Was: fput: task_work_add() can fail if the caller
	has passed exit_task_work())

sorry, forgot to mention...

On 06/15, Oleg Nesterov wrote:
>
> > OT: I don't think that schedule_work() needs to be inside the locked
> > region.  Scalability improvements beckon!
>
> Yeees, I thought about this too.
>
> Performance-wise this can't really help, this case is unlikely. But
> I think this change makes this code a bit simpler, so please see 1/3.

This is on top of
fput-task_work_add-can-fail-if-the-caller-has-passed-exit_task_work-fix.patch

it textually depends on the comment block in fput() added by that patch.

Oleg.

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