From: Christoph Lameter <clameter@sgi.com>
To: Andrea Arcangeli <andrea@qumranet.com>
Cc: Robin Holt <holt@sgi.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
steiner@sgi.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, Nick Piggin <npiggin@suse.de>
Subject: Re: EMM: disable other notifiers before register and unregister
Date: Thu, 3 Apr 2008 13:23:12 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0804031321260.8331@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0804031215050.7480@schroedinger.engr.sgi.com>
On Thu, 3 Apr 2008, Christoph Lameter wrote:
> > faults). So it should be ok to take all those locks inside the
> > mmap_sem and implement a lock_vm(mm) unlock_vm(mm). I'll think more
> > about this hammer approach while I try to implement it...
>
> Well good luck. Hopefully we will get to something that works.
Another hammer to use may be the freezer from software suspend. With that
you can get all tasks of a process into a definite state. Then take the
mmap_sem writably. But then there is still try_to_unmap and friends that
can race.
next prev parent reply other threads:[~2008-04-03 20:23 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-01 20:55 [ofa-general] [patch 0/9] [RFC] EMM Notifier V2 Christoph Lameter
2008-04-01 20:55 ` [patch 1/9] EMM Notifier: The notifier calls Christoph Lameter
2008-04-02 6:49 ` [ofa-general] " Andrea Arcangeli
2008-04-02 10:59 ` Robin Holt
2008-04-02 11:16 ` Andrea Arcangeli
2008-04-02 14:26 ` Robin Holt
2008-04-02 17:59 ` [ofa-general] " Christoph Lameter
2008-04-02 19:03 ` [ofa-general] EMM: Fixup return value handling of emm_notify() Christoph Lameter
2008-04-02 21:25 ` [ofa-general] " Andrea Arcangeli
2008-04-02 21:33 ` Christoph Lameter
2008-04-03 10:40 ` Peter Zijlstra
2008-04-03 15:00 ` Andrea Arcangeli
2008-04-03 19:14 ` Christoph Lameter
2008-04-02 21:05 ` [ofa-general] EMM: Require single threadedness for registration Christoph Lameter
2008-04-02 22:01 ` [ofa-general] " Andrea Arcangeli
2008-04-02 22:06 ` Christoph Lameter
2008-04-02 22:17 ` Andrea Arcangeli
2008-04-02 22:41 ` Christoph Lameter
2008-04-03 1:24 ` EMM: disable other notifiers before register and unregister Christoph Lameter
2008-04-03 10:40 ` [ofa-general] " Peter Zijlstra
2008-04-03 15:29 ` Andrea Arcangeli
2008-04-03 19:20 ` [ofa-general] " Christoph Lameter
2008-04-03 20:23 ` Christoph Lameter [this message]
2008-04-04 12:30 ` Andrea Arcangeli
2008-04-04 20:20 ` [ofa-general] [PATCH] mmu notifier #v11 Andrea Arcangeli
2008-04-04 22:06 ` Christoph Lameter
2008-04-05 0:23 ` [ofa-general] " Andrea Arcangeli
2008-04-07 5:45 ` Christoph Lameter
2008-04-07 6:02 ` [ofa-general] " Andrea Arcangeli
2008-04-02 21:53 ` [ofa-general] Re: [patch 1/9] EMM Notifier: The notifier calls Andrea Arcangeli
2008-04-02 21:54 ` Christoph Lameter
2008-04-02 22:09 ` Andrea Arcangeli
2008-04-02 23:04 ` Christoph Lameter
2008-04-01 20:55 ` [ofa-general] [patch 2/9] Move tlb flushing into free_pgtables Christoph Lameter
2008-04-01 20:55 ` [ofa-general] [patch 3/9] Convert i_mmap_lock to i_mmap_sem Christoph Lameter
2008-04-01 20:55 ` [patch 4/9] Remove tlb pointer from the parameters of unmap vmas Christoph Lameter
2008-04-01 20:55 ` [patch 5/9] Convert anon_vma lock to rw_sem and refcount Christoph Lameter
2008-04-02 17:50 ` Andrea Arcangeli
2008-04-02 18:15 ` Christoph Lameter
2008-04-02 21:56 ` [ofa-general] " Andrea Arcangeli
2008-04-02 21:56 ` Christoph Lameter
2008-04-02 22:12 ` Andrea Arcangeli
2008-04-01 20:55 ` [patch 6/9] This patch exports zap_page_range as it is needed by XPMEM Christoph Lameter
2008-04-01 20:55 ` [patch 7/9] Locking rules for taking multiple mmap_sem locks Christoph Lameter
2008-04-01 20:55 ` [patch 8/9] XPMEM: The device driver Christoph Lameter
2008-04-01 20:55 ` [patch 9/9] XPMEM: Simple example Christoph Lameter
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