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From: Mimi Zohar <zohar@linux.vnet.ibm.com>
To: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	". James Morris" <jmorris@namei.org>,
	linux-security-module@vger.kernel.org,
	linux-kernel <linux-kernel@vger.kernel.org>
Subject: deferring __fput()
Date: Fri, 22 Jun 2012 08:44:58 -0400	[thread overview]
Message-ID: <1340369098.2464.20.camel@falcor> (raw)

Al,

I really appreciate all of the work that has gone into making __fput()
lockless - making the syscalls use get/put_light(), signal changes, and
using Oleg's task_work_add() to defer processes. 

Currently, when unmapping a file after closing it, I'm not getting the
mmap_sem/i_mutex lockdep any more.  This seems due to Tyler Hick's
commit 978d6d8 "vfs: Correctly set the dir i_mutex lockdep class",
rather than the above changes.

Although the mmap_sem/i_mutex lockdep doesn't exist anymore, before
upstreaming IMA-appraisal, the issue with __fput() should probably be
resolved. :)   What else needs to be done to make __fput() lockless?
How can I help?

thanks,

Mimi







             reply	other threads:[~2012-06-22 12:47 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-06-22 12:44 Mimi Zohar [this message]
2012-06-23  9:20 ` deferring __fput() 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                 ` [PATCH 0/4] Was: " Oleg Nesterov
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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