linux-kernel - Re: [PATCH v3] mm/page_owner: use kvmalloc instead of kmalloc

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: <20181030081537.GV32673@dhcp22.suse.cz>
Date:   Tue, 30 Oct 2018 09:15:37 +0100
From:   Michal Hocko <mhocko@...nel.org>
To:     Miles Chen <miles.chen@...iatek.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Joe Perches <joe@...ches.com>,
        Matthew Wilcox <willy@...radead.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, wsd_upstream@...iatek.com
Subject: Re: [PATCH v3] mm/page_owner: use kvmalloc instead of kmalloc

On Tue 30-10-18 14:55:51, Miles Chen wrote:
[...]
> It's a real problem when using page_owner.
> I found this issue recently: I'm not able to read page_owner information
> during a overnight test. (error: read failed: Out of memory). I replace
> kmalloc() with vmalloc() and it worked well.

Is this with trimming the allocation to a single page and doing shorter
than requested reads?
-- 
Michal Hocko
SUSE Labs