netdev - Re: Heads-up: two regressions in v4.11-rc series

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CA+55aFznH8Y9_okyQ=dU1AeJL8rtHx=n5DqT3sGJj7kr6QMYXA@mail.gmail.com>
Date:   Fri, 21 Apr 2017 10:52:29 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Mel Gorman <mgorman@...hsingularity.net>
Cc:     Jesper Dangaard Brouer <brouer@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Frederic Weisbecker <fweisbec@...il.com>,
        Tariq Toukan <tariqt@...lanox.com>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-mm <linux-mm@...ck.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: Heads-up: two regressions in v4.11-rc series

On Thu, Apr 20, 2017 at 7:30 AM, Mel Gorman <mgorman@...hsingularity.net> wrote:
>> The end result was a revert, and this is waiting in AKPMs quilt queue:
>>  http://ozlabs.org/~akpm/mmots/broken-out/revert-mm-page_alloc-only-use-per-cpu-allocator-for-irq-safe-requests.patch
>>
>
> This was flagged to Andrew that it should go in for either 4.11 or if
> there were concerns about how close to the release we are then put it in
> for 4.11-stable. At worst, I can do a resubmit to -stable myself after
> it gets merged in the next window if it falls between the cracks.

This got merged (commit d34b0733b452: "Revert "mm, page_alloc: only
use per-cpu allocator for irq-safe requests"").

The other issue (caused by commit a499a5a14dbd: "sched/cputime:
Increment kcpustat directly on irqtime account") is still open.

Frederic? Revert? But I guess it's something we can delay for
backporting, it's presumably not possible to hit maliciously except on
some fast local network attacker just causing an effective DoS.

                   Linus