linux-kernel - Re: [PATCH v3 7/8] mm/mempolicy: use a standard migration target allocation callback

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: <20200708064524.GA7271@dhcp22.suse.cz>
Date:   Wed, 8 Jul 2020 08:45:24 +0200
From:   Michal Hocko <mhocko@...nel.org>
To:     Qian Cai <cai@....pw>
Cc:     js1304@...il.com, Andrew Morton <akpm@...ux-foundation.org>,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        kernel-team@....com, Vlastimil Babka <vbabka@...e.cz>,
        Christoph Hellwig <hch@...radead.org>,
        Roman Gushchin <guro@...com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: Re: [PATCH v3 7/8] mm/mempolicy: use a standard migration target
 allocation callback

On Tue 07-07-20 21:20:44, Qian Cai wrote:
[...]
> migrate_pages() starts failing like this apparently using the new
> callback on NUMA systems,
> 
> [ 6147.019063][T45242] LTP: starting move_pages12
> [ 6147.475680][T64921] BUG: unable to handle page fault for address: ffffffffffffffe0

Hmm, this looks like -EPIPE (-32) which is unexpected to say the least.
Does the test pass without this patch applied? Also there has been v4
posted just yesterday. Does it suffer from the same problem?

-- 
Michal Hocko
SUSE Labs