linux-kernel - Re: [PATCH 3/3] KVM: use vcalloc/__vcalloc for very large allocations

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Date:   Tue, 8 Mar 2022 15:25:11 +0100
From:   David Hildenbrand <david@...hat.com>
To:     Paolo Bonzini <pbonzini@...hat.com>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Cc:     Michael Ellerman <mpe@...erman.id.au>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Dennis Zhou <dennis@...nel.org>, Tejun Heo <tj@...nel.org>,
        Christoph Lameter <cl@...ux.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>, linux-mm@...ck.org,
        cgroups@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH 3/3] KVM: use vcalloc/__vcalloc for very large allocations

On 08.03.22 11:59, Paolo Bonzini wrote:
> Allocations whose size is related to the memslot size can be arbitrarily
> large.  Do not use kvzalloc/kvcalloc, as those are limited to "not crazy"
> sizes that fit in 32 bits.  Now that it is available, they can use either
> vcalloc or __vcalloc, the latter if accounting is required.
> 
> Cc: stable@...r.kernel.org
> Cc: kvm@...r.kernel.org
> Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>

Fixes: 7661809d493b ("mm: don't allow oversized kvmalloc() calls")

?

Reviewed-by: David Hildenbrand <david@...hat.com>


-- 
Thanks,

David / dhildenb