From: Gleb Natapov <gleb@minantech.com>
To: "Michael S. Tsirkin" <mst@mellanox.co.il>
Cc: Hugh Dickins <hugh@veritas.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Petr Vandrovec <vandrove@vc.cvut.cz>,
Nick Piggin <nickpiggin@yahoo.com.au>,
Badari Pulavarty <pbadari@us.ibm.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Nick's core remove PageReserved broke vmware...
Date: Mon, 14 Nov 2005 14:27:59 +0200 [thread overview]
Message-ID: <20051114122759.GE5492@minantech.com> (raw)
In-Reply-To: <20051114122535.GP20871@mellanox.co.il>
On Mon, Nov 14, 2005 at 02:25:35PM +0200, Michael S. Tsirkin wrote:
> Quoting Hugh Dickins <hugh@veritas.com>:
> > Subject: Re: Nick's core remove PageReserved broke vmware...
> >
> > On Tue, 8 Nov 2005, Michael S. Tsirkin wrote:
> > >
> > > Hugh, did you have something like the following in mind
> > > (this is only boot-tested and only on x86-64)?
> >
> > Yes, that looks pretty good to me, a few comments below.
> > Only another twenty or so architectures to go ;)
>
> There's one thing that I have thought about: what happens
> if I set DONTFORK on a page which already has COW set
> (e.g. after fork)?
>
> It seems that the right thing would be to force a page copy -
> otherwise the page can get copied on write.
>
I thought about it. It should not happen for OpenIB since get_user_pages
will break COW for us and I don't think we should complicate DONTFORK
implementation by doing break during madvise().
--
Gleb.
next prev parent reply other threads:[~2005-11-14 12:28 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-01 19:30 Nick's core remove PageReserved broke vmware Petr Vandrovec
2005-11-02 0:34 ` Nick Piggin
2005-11-02 1:17 ` Petr Vandrovec
2005-11-02 2:09 ` Nick Piggin
2005-11-02 12:26 ` Hugh Dickins
2005-11-02 18:06 ` Petr Vandrovec
2005-11-02 21:04 ` Benjamin Herrenschmidt
2005-11-02 21:41 ` Hugh Dickins
2005-11-02 21:45 ` Benjamin Herrenschmidt
2005-11-02 22:02 ` Hugh Dickins
2005-11-02 22:22 ` Benjamin Herrenschmidt
2005-11-03 8:03 ` Gleb Natapov
2005-11-03 13:32 ` Hugh Dickins
2005-11-03 13:55 ` Gleb Natapov
2005-11-03 21:21 ` Benjamin Herrenschmidt
2005-11-02 22:39 ` Petr Vandrovec
2005-11-03 8:12 ` Gleb Natapov
2005-11-03 14:11 ` Hugh Dickins
2005-11-03 14:22 ` Gleb Natapov
2005-11-03 14:37 ` Michael S. Tsirkin
2005-11-03 14:59 ` Hugh Dickins
2005-11-03 15:09 ` Gleb Natapov
2005-11-03 15:14 ` Michael S. Tsirkin
2005-11-03 15:37 ` Hugh Dickins
2005-11-03 15:53 ` Gleb Natapov
2005-11-03 15:56 ` Michael S. Tsirkin
2005-11-08 21:34 ` Michael S. Tsirkin
2005-11-10 12:35 ` Gleb Natapov
2005-11-10 12:48 ` Michael S. Tsirkin
2005-11-10 12:49 ` Gleb Natapov
2005-11-10 13:16 ` Michael S. Tsirkin
2005-11-10 13:16 ` Gleb Natapov
2005-11-10 13:21 ` Hugh Dickins
2005-11-10 13:26 ` Gleb Natapov
2005-11-10 13:15 ` Hugh Dickins
2005-11-10 13:10 ` Hugh Dickins
2005-11-10 13:37 ` Michael S. Tsirkin
2005-11-10 13:55 ` Hugh Dickins
2005-11-10 14:12 ` Michael S. Tsirkin
2005-11-14 12:25 ` Michael S. Tsirkin
2005-11-14 12:27 ` Gleb Natapov [this message]
2005-11-14 12:34 ` Michael S. Tsirkin
2005-11-14 12:40 ` Hugh Dickins
2005-11-14 14:57 ` Michael S. Tsirkin
2005-11-14 15:07 ` Gleb Natapov
2005-11-14 12:41 ` Gleb Natapov
2005-11-14 14:52 ` Michael S. Tsirkin
2005-11-14 15:00 ` Gleb Natapov
2005-11-14 20:23 ` Michael S. Tsirkin
2005-11-15 9:26 ` Gleb Natapov
2005-11-14 15:58 ` Hugh Dickins
2005-11-14 21:17 ` Michael S. Tsirkin
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