From: Andrea Arcangeli <andrea@qumranet.com>
To: Avi Kivity <avi@qumranet.com>
Cc: Marcelo Tosatti <marcelo.tosatti@cyclades.com.br>, kvm@vger.kernel.org
Subject: Re: [PATCH 4/6] kvm-userland.git mmu notifier compat
Date: Tue, 29 Jul 2008 15:03:35 +0200 [thread overview]
Message-ID: <20080729130335.GM11494@duo.random> (raw)
In-Reply-To: <488F11C4.5050109@qumranet.com>
On Tue, Jul 29, 2008 at 03:49:08PM +0300, Avi Kivity wrote:
> Applied; thanks. I think page pinning can be worked around by pinning all
> pages on memslot registration (and unpinning on memslot removal); this will
> slow down virtual machine startup, but is at least simple.
This has the benefit that will also fix the tlb issues, but if we go
this way if a sles/rhel user takes the next kvm release, all ram will
be pinned and it won't swap anything for him, like with my patch that
added VM_LOCKED. Said that swap wasn't a reliable feature before so
nobody should have depended on that.
If we really go this memslot-wide-pinning way I could submit to rhel
and sles a mmu notifier backport so the rhel/sles users won't have to
wait to get their kernel upgraded to 2.6.27 to get full kvm-paging.
next prev parent reply other threads:[~2008-07-29 13:03 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-25 14:24 [PATCH 1/6] kvm.git mmu notifier patch Andrea Arcangeli
2008-07-25 14:26 ` [PATCH 2/6] kvm.git allow reading aliases with mmu_lock Andrea Arcangeli
2008-07-25 14:32 ` [PATCH 3/6] kvm.git allow browsing memslots " Andrea Arcangeli
2008-07-25 14:38 ` [PATCH 4/6] kvm-userland.git mmu notifier compat Andrea Arcangeli
2008-07-25 14:40 ` [PATCH 5/6] kvm.git handle reserved pages as mmio Andrea Arcangeli
2008-07-25 14:44 ` [PATCH 6/6] kvm.git allow reserved pages to be used as guest phys ram Andrea Arcangeli
2008-07-29 12:49 ` [PATCH 4/6] kvm-userland.git mmu notifier compat Avi Kivity
2008-07-29 13:03 ` Andrea Arcangeli [this message]
2008-07-29 13:30 ` Avi Kivity
2008-07-29 13:37 ` Andrea Arcangeli
2008-07-28 21:51 ` [PATCH 3/6] kvm.git allow browsing memslots with mmu_lock Marcelo Tosatti
2008-07-28 22:06 ` Andrea Arcangeli
2008-07-28 21:43 ` [PATCH 2/6] kvm.git allow reading aliases " Marcelo Tosatti
2008-07-28 21:11 ` [PATCH 1/6] kvm.git mmu notifier patch Marcelo Tosatti
2008-07-28 21:15 ` Marcelo Tosatti
2008-07-29 9:31 ` Avi Kivity
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