From: Andrea Arcangeli <andrea@qumranet.com>
To: Avi Kivity <avi@qumranet.com>
Cc: kvm-devel@lists.sourceforge.net, Marcelo Tosatti <mtosatti@redhat.com>
Subject: Re: [PATCH] KVM: MMU: Fix rmap_remove() race
Date: Thu, 27 Mar 2008 14:52:56 +0100 [thread overview]
Message-ID: <20080327135256.GB13959@duo.random> (raw)
In-Reply-To: <47EB56BE.9000909@qumranet.com>
On Thu, Mar 27, 2008 at 10:11:42AM +0200, Avi Kivity wrote:
> Erm I don't think this means what you think it means. This is the
> kernel/user communication area, used to pass exit data to userspace. It's
> not the memslot vma.
Yep... only the kvm_vm_vm_ops can run gfn_to_page, and I assume that
was used by the old userland and not relevant anymore (smaps don't
show it either), or the pages could not be unmapped. So btw, that
kvm-vm anon inode must be disabled when mmu notifiers are configured
in to guarantee that access to /dev/kvm won't lead to mlock behavior.
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next prev parent reply other threads:[~2008-03-27 13:52 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-26 15:02 [PATCH] KVM: MMU: Fix rmap_remove() race Avi Kivity
2008-03-26 15:15 ` Avi Kivity
2008-03-26 17:51 ` Marcelo Tosatti
2008-03-26 18:12 ` Andrea Arcangeli
2008-03-26 19:01 ` Marcelo Tosatti
2008-03-27 8:01 ` Avi Kivity
2008-03-26 19:22 ` Andrea Arcangeli
2008-03-26 19:27 ` Andrea Arcangeli
2008-03-27 8:06 ` Avi Kivity
2008-03-27 8:11 ` Avi Kivity
2008-03-27 13:52 ` Andrea Arcangeli [this message]
2008-03-27 13:56 ` Avi Kivity
2008-03-27 14:26 ` Andrea Arcangeli
2008-03-27 14:35 ` Avi Kivity
2008-03-27 14:50 ` Andrea Arcangeli
2008-03-27 14:56 ` Avi Kivity
2008-03-28 14:01 ` Andrea Arcangeli
2008-03-28 20:07 ` Andrea Arcangeli
2008-03-31 6:35 ` Avi Kivity
2008-03-31 9:25 ` Andrea Arcangeli
2008-03-27 15:26 ` Andi Kleen
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