linux-kernel - Re: [PATCH v4 3/4] kvm: Add interruptible flag to __gfn_to_pfn

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Message-ID: <Y1m5dv48PKOY6Xbq@google.com>
Date:   Wed, 26 Oct 2022 22:49:26 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Peter Xu <peterx@...hat.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        John Hubbard <jhubbard@...dia.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        David Matlack <dmatlack@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andrea Arcangeli <aarcange@...hat.com>,
        "Dr . David Alan Gilbert" <dgilbert@...hat.com>,
        David Hildenbrand <david@...hat.com>,
        Linux MM Mailing List <linux-mm@...ck.org>,
        Mike Kravetz <mike.kravetz@...cle.com>
Subject: Re: [PATCH v4 3/4] kvm: Add interruptible flag to
 __gfn_to_pfn_memslot()

"KVM:" for the shortlog.

On Tue, Oct 11, 2022, Peter Xu wrote:
> Add a new "interruptible" flag showing that the caller is willing to be
> interrupted by signals during the __gfn_to_pfn_memslot() request.  Wire it
> up with a FOLL_INTERRUPTIBLE flag that we've just introduced.
> 
> This prepares KVM to be able to respond to SIGUSR1 (for QEMU that's the
> SIGIPI) even during e.g. handling an userfaultfd page fault.
> 
> No functional change intended.
> 
> Signed-off-by: Peter Xu <peterx@...hat.com>
> ---

Reviewed-by: Sean Christopherson <seanjc@...gle.com>