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: <CA+55aFw4R7B8pAJ4TNVefdtCVAnZKY28i6_+5jQhoop60-NuQQ@mail.gmail.com>
Date:   Tue, 29 Nov 2016 09:17:37 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     Vlastimil Babka <vbabka@...e.cz>, Tejun Heo <tj@...nel.org>,
        Jens Axboe <axboe@...nel.dk>, linux-mm <linux-mm@...ck.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 Tue, Nov 29, 2016 at 9:13 AM, Michal Hocko <mhocko@...nel.org> wrote:
> How does this look like?

No.

I *really* want people to write out that "I am ok with the allocation failing".

It's not an "inconvenience". It's a sign that you are competent and
that you know it will fail, and that you can handle it.

If you don't show that you know that, we warn about it.

And no, "GFP_NOWAIT" does *not* mean "I have a good fallback".

             Linus