linux-kernel - Re: taskstats root only breaking iotop

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-next>] [day] [month] [year] [list]

Date:	Sat, 1 Oct 2011 23:54:01 +0200
From:	Guillaume Chazarain <guichaz@...il.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Balbir Singh <bsingharora@...il.com>,
	Vasiliy Kulikov <segoon@...nwall.com>
Subject: Re: taskstats root only breaking iotop

On Thu, Sep 22, 2011 at 2:32 AM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>      Make TASKSTATS require root access
>      Make taskstats round statistics down to nearest 1k bytes/events

Hello, iotop author here.

With taskstats being root only, what's the benefit of making the stats
imprecise (not that it matters to iotop)?

How about this plan instead:
- byte level stats only if ptrace_may_access() though iotop can
certainly live with 1k rounded values
- rounded stats or just nothing otherwise
- potentially an extra field in the taskstats structure indicating
when the information is degraded

Thanks

-- 
Guillaume
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/