From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Michael S. Tsirkin" <mst@redhat.com>
Subject: Re: [RFC][Patch v9 0/6] KVM: Guest Free Page Hinting
Date: Thu, 7 Mar 2019 13:46:16 -0500
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 <CAKgT0Ud35pmmfAabYJijWo8qpucUWS8-OzBW=gsotfxZFuS9PQ@mail.gmail.com>
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Cc: Nitesh Narayan Lal <nitesh@redhat.com>,
        kvm list <kvm@vger.kernel.org>,
        LKML <linux-kernel@vger.kernel.org>,
        linux-mm <linux-mm@kvack.org>,
        Paolo Bonzini <pbonzini@redhat.com>, lcapitulino@redhat.com,
        pagupta@redhat.com, wei.w.wang@intel.com,
        Yang Zhang <yang.zhang.wz@gmail.com>,
        Rik van Riel <riel@surriel.com>,
        David Hildenbrand <david@redhat.com>, dodgen@google.com,
        Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
        dhildenb@redhat.com, Andrea Arcangeli <aarcange@redhat.com>
To: Alexander Duyck <alexander.duyck@gmail.com>
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On Wed, Mar 06, 2019 at 10:00:05AM -0800, Alexander Duyck wrote:
> I have been thinking about this. Instead of stealing the page couldn't
> you simply flag it that there is a hint in progress and simply wait in
> arch_alloc_page until the hint has been processed? The problem is in
> stealing pages you are going to introduce false OOM issues when the
> memory isn't available because it is being hinted on.

Can we not give them back in an OOM notifier?

-- 
MST