linux-kernel - Re: [PATCH] block,blkcg: use __GFP_NOWARN for best-effort allocations in blkcg

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: <552f51ad-bf74-567d-63ee-afda4d121797@kernel.dk>
Date:   Tue, 22 Nov 2016 09:00:24 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     Tejun Heo <tj@...nel.org>
Cc:     Vlastimil Babka <vbabka@...e.cz>, linux-mm@...ck.org,
        Michal Hocko <mhocko@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Marc MERLIN <marc@...lins.org>
Subject: Re: [PATCH] block,blkcg: use __GFP_NOWARN for best-effort allocations
 in blkcg

On 11/21/2016 04:03 PM, Tejun Heo wrote:
> blkcg allocates some per-cgroup data structures with GFP_NOWAIT and
> when that fails falls back to operations which aren't specific to the
> cgroup.  Occassional failures are expected under pressure and falling
> back to non-cgroup operation is the right thing to do.
>
> Unfortunately, I forgot to add __GFP_NOWARN to these allocations and
> these expected failures end up creating a lot of noise.  Add
> __GFP_NOWARN.

Thanks Tejun, added for 4.10.

-- 
Jens Axboe