From: Paolo Bonzini <pbonzini@redhat.com>
To: Sunil <infinite.questions@gmail.com>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: Re: When is the page table built for migration destination ?
Date: Mon, 09 Sep 2013 11:58:01 +0200 [thread overview]
Message-ID: <522D9BA9.90303@redhat.com> (raw)
In-Reply-To: <CALSEb2fxqHkS_8exXOTKpMxs+jbs1yvDSxGi3Nyk=C8DiKiw9Q@mail.gmail.com>
Il 09/09/2013 11:38, Sunil ha scritto:
> Thanks Paolo.
>
> I am using KVM with EPT support, so I understand this will require
> gfn->pfn translation. Going through the code, looks like function
> tdp_page_fault() is responsible for setting up this mapping.
>
> Though the page table is constructed lazily, I understand the page
> contents are already transferred during migration. Can you please
> explain or point to function names which finds the correct page
> contents for given gfn ? (looks like pte is created in
> __direct_map())
GFNs are looked up through the memory slots array. Look at
gfn_to_memslot, gfn_to_hva, and related functions in
virt/kvm/kvm_main.c; also the __gfn_to_memslot and __gfn_to_hva_memslot
inlines in include/linux/kvm_host.h.
Paolo
prev parent reply other threads:[~2013-09-09 9:57 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-09 5:27 When is the page table built for migration destination ? qna
2013-09-09 8:14 ` Paolo Bonzini
2013-09-09 9:38 ` Sunil
2013-09-09 9:58 ` Paolo Bonzini [this message]
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