linux-kernel - Re: [PATCH 1/2] mm: thp: relax __GFP_THISNODE for MADV

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: <20181015154459.e870c30df5c41966ffb4aed8@linux-foundation.org>
Date:   Mon, 15 Oct 2018 15:44:59 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     David Rientjes <rientjes@...gle.com>
Cc:     Andrea Arcangeli <aarcange@...hat.com>,
        Michal Hocko <mhocko@...nel.org>, Mel Gorman <mgorman@...e.de>,
        Vlastimil Babka <vbabka@...e.cz>,
        Andrea Argangeli <andrea@...nel.org>,
        Zi Yan <zi.yan@...rutgers.edu>,
        Stefan Priebe - Profihost AG <s.priebe@...fihost.ag>,
        "Kirill A. Shutemov" <kirill@...temov.name>, linux-mm@...ck.org,
        LKML <linux-kernel@...r.kernel.org>,
        Stable tree <stable@...r.kernel.org>
Subject: Re: [PATCH 1/2] mm: thp:  relax __GFP_THISNODE for MADV_HUGEPAGE
 mappings

On Mon, 15 Oct 2018 15:30:17 -0700 (PDT) David Rientjes <rientjes@...gle.com> wrote:

> At the risk of beating a dead horse that has already been beaten, what are 
> the plans for this patch when the merge window opens?

I'll hold onto it until we've settled on something.  Worst case,
Andrea's original is easily backportable.

>  It would be rather 
> unfortunate for us to start incurring a 14% increase in access latency and 
> 40% increase in fault latency.

Yes.

>  Would it be possible to test with my 
> patch[*] that does not try reclaim to address the thrashing issue?

Yes please.

And have you been able to test it with the sort of workloads which
Andrea is attempting to address?