From: "Michael S. Tsirkin" <mst@mellanox.co.il>
To: Linus Torvalds <torvalds@osdl.org>
Cc: Roland Dreier <rdreier@cisco.com>,
Nick Piggin <nickpiggin@yahoo.com.au>,
Gleb Natapov <gleb@minantech.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
openib-general@openib.org, Petr Vandrovec <vandrove@vc.cvut.cz>,
Badari Pulavarty <pbadari@us.ibm.com>,
Hugh Dickins <hugh@veritas.com>
Subject: Re: Re: madvise MADV_DONTFORK/MADV_DOFORK
Date: Mon, 13 Feb 2006 22:05:46 +0200 [thread overview]
Message-ID: <20060213200546.GG12458@mellanox.co.il> (raw)
In-Reply-To: <Pine.LNX.4.64.0602131125180.3691@g5.osdl.org>
Quoting Linus Torvalds <torvalds@osdl.org>:
> I would suggest that if you wanted to be very careful, you'd simply
> disallow changing - or perhaps just clearing - that DONTCOPY flag on
> special regions (ie ones that have been marked with VM_IO or VM_RESERVED).
Right, this was already proposed here
http://lkml.org/lkml/2005/11/3/81
and I site:
> You're then saying that a process cannot set VM_DONTCOPY on a VM_IO
> area to prevent the first child getting the area, but clear it after
> so the next child does get a copy of the area. I think it'd be wrong
> (surprising) to limit the functionality in that way.
--
Michael S. Tsirkin
Staff Engineer, Mellanox Technologies
next prev parent reply other threads:[~2006-02-13 20:04 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-13 15:41 Michael S. Tsirkin
2006-02-13 18:23 ` Hugh Dickins
2006-02-13 19:02 ` Michael S. Tsirkin
2006-02-14 6:51 ` Gleb Natapov
2006-02-13 19:04 ` [openib-general] " Roland Dreier
2006-02-13 19:05 ` Linus Torvalds
2006-02-13 19:16 ` [openib-general] " Roland Dreier
2006-02-13 19:34 ` Linus Torvalds
2006-02-13 19:50 ` Hugh Dickins
2006-02-13 21:09 ` Michael S. Tsirkin
2006-02-13 21:57 ` Hugh Dickins
2006-02-13 22:09 ` Michael S. Tsirkin
2006-02-13 22:54 ` Hugh Dickins
2006-02-13 23:01 ` [PATCH] " Michael S. Tsirkin
2006-02-13 23:44 ` Hugh Dickins
2006-02-13 22:27 ` [openib-general] " Linus Torvalds
2006-02-13 22:55 ` Michael S. Tsirkin
2006-02-13 23:01 ` Hugh Dickins
2006-02-13 23:35 ` [PATCH] " Michael S. Tsirkin
2006-02-15 4:31 ` Nick Piggin
2006-02-15 6:09 ` Roland Dreier
2006-02-15 6:16 ` Andrew Morton
2006-02-15 6:34 ` [PATCH] Fix up MADV_DONTFORK/MADV_DOFORK definitions Roland Dreier
2006-02-15 6:48 ` Gleb Natapov
2006-02-15 7:06 ` Nick Piggin
2006-02-15 7:31 ` Bernd Eckenfels
2006-02-15 8:18 ` Michael S. Tsirkin
2006-02-15 8:13 ` [PATCH] madvise MADV_DONTFORK/MADV_DOFORK Michael S. Tsirkin
2006-02-13 20:05 ` Michael S. Tsirkin [this message]
2006-02-13 19:20 ` Michael S. Tsirkin
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