From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: [RFC]VM live snapshot proposal
Date: Mon, 03 Mar 2014 14:18:28 +0100
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Cc: "kwolf@redhat.com" <kwolf@redhat.com>,
	"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
	Wenchao Xia <xiawenc@linux.vnet.ibm.com>,
	Pavel Hrdina <phrdina@redhat.com>,
	KVM devel mailing list <kvm@vger.kernel.org>,
	Zhanghailiang <zhang.zhanghailiang@huawei.com>,
	Dr David Alan Gilbert <davidagilbert@uk.ibm.com>,
	Andrea Arcangeli <aarcange@redhat.com>
To: Stefan Hajnoczi <stefanha@gmail.com>,
	"Huangpeng (Peter)" <peter.huangpeng@huawei.com>
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Il 03/03/2014 13:32, Stefan Hajnoczi ha scritto:
> If there is not enough memory to fork, then a synchronous approach to
> catching guest memory writes is needed.  I'm not sure if a good
> mechanism for that exists but the simplest would be mprotect(2) and a
> signal handler (which will make the guest run very slowly).

I think we'll be adding such a mechanism, but for guest memory reads, 
for postcopy migration.  Perhaps it could be reused for live snapshotting?

Paolo