From: Andrew Morton <akpm@linux-foundation.org>
To: Shiraz Hashim <shashim@codeaurora.org>
Cc: linux-mm@kvack.org, oleg@redhat.com, gorcunov@openvz.org,
linux-kernel@vger.kernel.org, n-horiguchi@ah.jp.nec.com
Subject: Re: [PATCH] mm: pagewalk: call pte_hole() for VM_PFNMAP during walk_page_range
Date: Thu, 22 Jan 2015 12:08:20 -0800 [thread overview]
Message-ID: <20150122120820.8c279cf8.akpm@linux-foundation.org> (raw)
In-Reply-To: <1421820793-28883-1-git-send-email-shashim@codeaurora.org>
On Wed, 21 Jan 2015 11:43:13 +0530 Shiraz Hashim <shashim@codeaurora.org> wrote:
> walk_page_range silently skips vma having VM_PFNMAP set,
> which leads to undesirable behaviour at client end (who
> called walk_page_range). For example for pagemap_read,
> when no callbacks are called against VM_PFNMAP vma,
> pagemap_read may prepare pagemap data for next virtual
> address range at wrong index.
This changelog doesn't have enough information for me to be able to
work out whether a -stable backport is needed. Please always describe
the user-visible effects of a bug.
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prev parent reply other threads:[~2015-01-22 20:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-21 6:13 [PATCH] mm: pagewalk: call pte_hole() for VM_PFNMAP during walk_page_range Shiraz Hashim
2015-01-21 6:30 ` Naoya Horiguchi
2015-01-22 20:08 ` Andrew Morton [this message]
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