From: Andrea Arcangeli <aarcange@redhat.com>
To: Michael Roth <mdroth@linux.vnet.ibm.com>
Cc: "Blue Swirl" <blauwirbel@gmail.com>,
"Andreas Färber" <andreas.faerber@web.de>,
"Anthony Liguori" <aliguori@us.ibm.com>,
"Alexander Graf" <agraf@suse.de>,
"qemu-devel@nongnu.org Developers" <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [PATCH] add MADV_DONTFORK to guest physical memory
Date: Wed, 5 Jan 2011 21:35:18 +0100 [thread overview]
Message-ID: <20110105203518.GH15823@random.random> (raw)
In-Reply-To: <4D24D3EB.1080702@linux.vnet.ibm.com>
On Wed, Jan 05, 2011 at 02:26:19PM -0600, Michael Roth wrote:
> Yah you're right, but I've seen several discussions about using mempath
> for tmpfs/ram-backed files for things like numa/zram/etc so tend to
> think of it as something potentially more than just a hook for
> hugetlbfs, which is becoming less and less useful. But the MADV_DONTFORK
> stuff should still be immediately applicable.
Yes, MADV_DONTFORK should be set all on all guest physical memory
without options so I hope the new patch I just posted is fine to stop
the spurious -ENOMEM failures in fork.
The ksm part should go incremental but 99% of it will be about
changing the command line, making the madvise conditional will be
trivial as well.
next prev parent reply other threads:[~2011-01-05 20:35 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-15 17:08 [Qemu-devel] [PATCH] add MADV_DONTFORK to guest physical memory Andrea Arcangeli
2010-09-15 17:34 ` Alexander Graf
2010-09-15 17:37 ` Andreas Färber
2011-01-05 15:10 ` Andrea Arcangeli
2011-01-05 18:02 ` Michael Roth
2011-01-05 19:44 ` Alexander Graf
2011-01-05 19:54 ` Andrea Arcangeli
2011-01-05 20:00 ` Alexander Graf
2011-01-05 20:12 ` Anthony Liguori
2011-01-05 20:15 ` Andrea Arcangeli
2011-01-05 20:26 ` Michael Roth
2011-01-05 20:35 ` Andrea Arcangeli [this message]
2011-01-05 21:27 ` Michael Roth
2011-01-06 17:49 ` Andrea Arcangeli
2011-01-06 20:49 ` Michael Roth
2011-01-05 20:10 ` Anthony Liguori
2010-09-15 21:03 ` [Qemu-devel] " Michael S. Tsirkin
2010-09-16 6:51 ` Gleb Natapov
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