linux-kernel - Re: [RFC PATCH 00/30] Code tagging framework and applications

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 for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <YxBYgcyP7IvMLJwq@hirez.programming.kicks-ass.net>
Date:   Thu, 1 Sep 2022 09:00:17 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Mel Gorman <mgorman@...e.de>
Cc:     Kent Overstreet <kent.overstreet@...ux.dev>,
        Suren Baghdasaryan <surenb@...gle.com>,
        akpm@...ux-foundation.org, mhocko@...e.com, vbabka@...e.cz,
        hannes@...xchg.org, roman.gushchin@...ux.dev, dave@...olabs.net,
        willy@...radead.org, liam.howlett@...cle.com, void@...ifault.com,
        juri.lelli@...hat.com, ldufour@...ux.ibm.com, peterx@...hat.com,
        david@...hat.com, axboe@...nel.dk, mcgrof@...nel.org,
        masahiroy@...nel.org, nathan@...nel.org, changbin.du@...el.com,
        ytcoode@...il.com, vincent.guittot@...aro.org,
        dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com,
        bristot@...hat.com, vschneid@...hat.com, cl@...ux.com,
        penberg@...nel.org, iamjoonsoo.kim@....com, 42.hyeyoo@...il.com,
        glider@...gle.com, elver@...gle.com, dvyukov@...gle.com,
        shakeelb@...gle.com, songmuchun@...edance.com, arnd@...db.de,
        jbaron@...mai.com, rientjes@...gle.com, minchan@...gle.com,
        kaleshsingh@...gle.com, kernel-team@...roid.com,
        linux-mm@...ck.org, iommu@...ts.linux.dev,
        kasan-dev@...glegroups.com, io-uring@...r.kernel.org,
        linux-arch@...r.kernel.org, xen-devel@...ts.xenproject.org,
        linux-bcache@...r.kernel.org, linux-modules@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 00/30] Code tagging framework and applications

On Wed, Aug 31, 2022 at 11:19:48AM +0100, Mel Gorman wrote:

> It's also unclear *who* would enable this. It looks like it would mostly
> have value during the development stage of an embedded platform to track
> kernel memory usage on a per-application basis in an environment where it
> may be difficult to setup tracing and tracking. Would it ever be enabled
> in production? 

Afaict this is developer only; it is all unconditional code.

> Would a distribution ever enable this? 

I would sincerely hope not. Because:

> If it's enabled, any overhead cannot be disabled/enabled at run or
> boot time so anyone enabling this would carry the cost without never
> necessarily consuming the data.

this.