From: Hugh Dickins <hugh@veritas.com>
To: Linus Torvalds <torvalds@osdl.org>
Cc: William Irwin <wli@holomorphy.com>,
Roland Dreier <rdreier@cisco.com>,
"Michael S. Tsirkin" <mst@mellanox.co.il>,
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>
Subject: Re: [openib-general] Re: madvise MADV_DONTFORK/MADV_DOFORK
Date: Mon, 13 Feb 2006 19:50:41 +0000 (GMT) [thread overview]
Message-ID: <Pine.LNX.4.61.0602131943050.9573@goblin.wat.veritas.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0602131125180.3691@g5.osdl.org>
On Mon, 13 Feb 2006, Linus Torvalds wrote:
>
> and the usage ends up matching that (except for some really strange issue
> with hugepage counting, which just looks wrong, but never mind).
Yes, I cc'ed wli on my reply to Michael,
we're hoping he'll just say delete that block.
> I can see where Hugh is coming from, but I think it's adding cruft very
> much for a "be very careful" reason.
>
> 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).
Fair enough, disallow clearing on VM_IO (VM_RESERVED is on its way out,
does little more than perpetuate a few accounting anomalies I think).
So no new VM_DONTFORK flag, stick with VM_DONTCOPY: that's fine with me.
Hugh
next prev parent reply other threads:[~2006-02-13 19:50 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 [this message]
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
2006-02-13 19:20 ` Michael S. Tsirkin
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