linux-kernel - Re: [PATCH 1/2] perf: fix PERF_EVENT_IOC

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]

Date:	Wed, 27 Nov 2013 10:15:02 -0500 (EST)
From:	Vince Weaver <vincent.weaver@...ne.edu>
To:	Will Deacon <will.deacon@....com>
cc:	linux-kernel@...r.kernel.org, Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH 1/2] perf: fix PERF_EVENT_IOC_PERIOD to force-reset the
 period

On Wed, 27 Nov 2013, Will Deacon wrote:

> Vince Weaver reports that, on all architectures apart from ARM,
> PERF_EVENT_IOC_PERIOD doesn't actually update the period until the next
> event fires. This is counter-intuitive behaviour and is better dealt
> with in the core code.

To be fair, it was Andreas Sandberg <andreas.sandberg@...uu.se>
who noticed this issue and reported it to me (in the context of 
the manpage being wrong).  I just passed it on to the linux-kernel list.

Vince
--
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/