From: Hugh Dickins <hughd@google.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Hugh Dickins <hughd@google.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm/shmem: Zero out unused vma fields in shmem_pseudo_vma_init()
Date: Thu, 31 May 2018 16:37:10 -0700 (PDT) [thread overview]
Message-ID: <alpine.LSU.2.11.1805311635410.13735@eggly.anvils> (raw)
In-Reply-To: <20180531155256.a5f557c9e620a6d7e85e4ca1@linux-foundation.org>
On Thu, 31 May 2018, Andrew Morton wrote:
> On Thu, 31 May 2018 16:56:02 +0300 "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> wrote:
>
> > shmem/tmpfs uses pseudo vma to allocate page with correct NUMA policy.
> >
> > The pseudo vma doesn't have vm_page_prot set. We are going to encode
> > encryption KeyID in vm_page_prot. Having garbage there causes problems.
> >
> > Zero out all unused fields in the pseudo vma.
> >
>
> So there are no known problems in the current mainline kernel?
Correct - if we limit ourselves to the area of the shmem pseudo-vma :)
Hugh
prev parent reply other threads:[~2018-05-31 23:37 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-31 13:56 [PATCH] mm/shmem: Zero out unused vma fields in shmem_pseudo_vma_init() Kirill A. Shutemov
2018-05-31 22:50 ` Hugh Dickins
2018-06-04 11:32 ` Kirill A. Shutemov
2018-05-31 22:52 ` Andrew Morton
2018-05-31 23:37 ` Hugh Dickins [this message]
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