From: Oleg Nesterov <oleg@redhat.com>
To: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Mimi Zohar <zohar@linux.vnet.ibm.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
". James Morris" <jmorris@namei.org>,
linux-security-module@vger.kernel.org,
linux-kernel <linux-kernel@vger.kernel.org>,
David Howells <dhowells@redhat.com>
Subject: [PATCH 0/4] Was: deferring __fput()
Date: Wed, 27 Jun 2012 20:37:21 +0200 [thread overview]
Message-ID: <20120627183721.GA23086@redhat.com> (raw)
In-Reply-To: <20120625151812.GA16062@redhat.com>
On 06/25, Oleg Nesterov wrote:
>
> And if it always takes ->pi_lock we do not need the new PF_ or something
> else, exit_task_work() can set task->task_works = NO_MORE under ->pi_lock
> (task_work_run() can check PF_EXITING), and task_work_add() ensures that
> task_works != NO_MORE.
>
> What do you think?
It is not clear to me if you agree or not. So I am simply sending the
patches I have.
Feel free to ignore or re-do.
Seriously, why should we add 2 pointers into task_struct? Sure, this
is minor, but still... But perhaps task_work.c should not play tricks
with the circular list, task_work_run() can reverse the list as you
initially suggested.
Also, I am not sure about "define rcu_head callback_head", this series
doesn't do this. But again, up to you.
Oleg.
next prev parent reply other threads:[~2012-06-27 18:39 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-22 12:44 deferring __fput() Mimi Zohar
2012-06-23 9:20 ` Al Viro
2012-06-23 19:45 ` Al Viro
2012-06-23 20:38 ` Oleg Nesterov
2012-06-23 21:01 ` Al Viro
2012-06-23 21:11 ` Al Viro
2012-06-24 4:16 ` Al Viro
2012-06-24 10:09 ` Al Viro
2012-06-24 16:54 ` Oleg Nesterov
2012-06-24 15:33 ` Oleg Nesterov
2012-06-25 6:03 ` Al Viro
2012-06-25 15:18 ` Oleg Nesterov
2012-06-27 18:37 ` Oleg Nesterov [this message]
2012-06-27 18:37 ` [PATCH 1/4] task_work: use the single-linked list to shrink sizeof(task_work) Oleg Nesterov
2012-06-27 18:37 ` [PATCH 2/4] task_work: don't rely on PF_EXITING Oleg Nesterov
2012-06-27 18:38 ` [PATCH 3/4] task_work: deal with task_work callbacks adding more work Oleg Nesterov
2012-06-27 18:38 ` [PATCH 4/4] task_work: kill task_work->data Oleg Nesterov
2012-06-27 19:05 ` Oleg Nesterov
2012-06-28 4:38 ` [PATCH 0/4] Was: deferring __fput() Al Viro
2012-06-28 16:22 ` Oleg Nesterov
2012-06-28 16:45 ` Oleg Nesterov
2012-06-30 6:24 ` Al Viro
2012-06-30 17:41 ` Oleg Nesterov
2012-06-29 5:30 ` Mimi Zohar
2012-06-29 8:33 ` Al Viro
2012-06-29 13:02 ` Mimi Zohar
2012-06-29 17:41 ` Al Viro
2012-06-29 21:38 ` Mimi Zohar
2012-06-29 23:56 ` Mimi Zohar
2012-06-30 5:02 ` Al Viro
2012-07-01 19:50 ` Mimi Zohar
2012-07-01 20:57 ` Al Viro
2012-07-02 1:46 ` Mimi Zohar
2012-07-02 3:43 ` Al Viro
2012-07-02 5:11 ` Al Viro
2012-07-02 11:49 ` Mimi Zohar
2012-07-02 12:02 ` Al Viro
2012-07-02 13:01 ` Mimi Zohar
2012-07-02 13:33 ` Al Viro
2012-07-02 14:50 ` Mimi Zohar
2012-08-21 13:05 ` [PATCH] task_work: add a scheduling point in task_work_run() Eric Dumazet
2012-08-21 20:37 ` Mimi Zohar
2012-08-21 21:32 ` Eric Dumazet
2012-08-22 3:13 ` Mimi Zohar
2012-08-22 5:27 ` Michael Wang
2012-08-22 5:38 ` Al Viro
2012-06-23 20:57 ` deferring __fput() Al Viro
2012-06-23 21:33 ` Al Viro
2012-06-24 15:20 ` Oleg Nesterov
2012-06-24 18:11 ` Oleg Nesterov
2012-06-25 12:03 ` Peter Zijlstra
2012-06-25 12:14 ` Al Viro
2012-06-25 13:19 ` Peter Zijlstra
2012-06-25 13:53 ` Al Viro
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