From: Peter Feiner <pfeiner@google.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: ashish0srivastava0@gmail.com,
bugzilla-daemon@bugzilla.kernel.org,
"Kirill A. Shutemov" <kirill@shutemov.name>,
linux-mm@kvack.org
Subject: Re: [Bug 117731] New: Doing mprotect for PROT_NONE and then for PROT_READ|PROT_WRITE reduces CPU write B/W on buffer
Date: Mon, 9 May 2016 11:07:48 -0700 [thread overview]
Message-ID: <CAM3pwhFHUzwKEShuOFos8nGqrjdNH=rwq55=ULWwOA5KEHVfWg@mail.gmail.com> (raw)
In-Reply-To: <20160506150112.9b27324b4b2b141146b0ff25@linux-foundation.org>
On Fri, May 6, 2016 at 3:01 PM, Andrew Morton <akpm@linux-foundation.org> wrote:
>
> (switched to email. Please respond via emailed reply-to-all, not via the
> bugzilla web interface).
>
> Great bug report, thanks.
>
> I assume the breakage was caused by
>
> commit 64e455079e1bd7787cc47be30b7f601ce682a5f6
> Author: Peter Feiner <pfeiner@google.com>
> AuthorDate: Mon Oct 13 15:55:46 2014 -0700
> Commit: Linus Torvalds <torvalds@linux-foundation.org>
> CommitDate: Tue Oct 14 02:18:28 2014 +0200
>
> mm: softdirty: enable write notifications on VMAs after VM_SOFTDIRTY cleared
>
>
> Could someone (Peter, Kirill?) please take a look?
Thanks for the report! I'm taking a look.
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next prev parent reply other threads:[~2016-05-09 18:07 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-117731-27@https.bugzilla.kernel.org/>
2016-05-06 22:01 ` Andrew Morton
2016-05-09 18:07 ` Peter Feiner [this message]
2016-05-16 13:35 ` Kirill A. Shutemov
2016-05-17 11:26 ` Ashish Srivastava
2016-05-17 11:36 ` Kirill A. Shutemov
2016-05-17 11:47 ` Ashish Srivastava
2016-05-17 12:03 ` Kirill A. Shutemov
2016-05-17 15:51 ` Peter Feiner
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