linux-kernel - Re: [patch] block: fix blktrace timestamps

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]

Date:	Fri, 11 Jan 2008 13:42:37 +0100
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	David Dillow <dillowda@...l.gov>,
	Guillaume Chazarain <guichaz@...oo.fr>,
	linux-kernel@...r.kernel.org, linux-btrace@...r.kernel.org,
	mingo@...hat.com, tglx@...utronix.de
Subject: Re: [patch] block: fix blktrace timestamps

On Fri, Jan 11 2008, Jens Axboe wrote:
> > ktime_get() should have been used instead, which is a proper GTOD 
> > clocksource. The patch below implements this.
> 
> Will give it a whirl, it looks promising indeed and gets rid of the ugly
> cpu sync stuff. What is the cost of ktime_get() compared to
> sched_clock()?

Works for me - will apply it right now, we can always evaluate any
potential performance impact later. It's more important to have a
functional blktrace in 2.6.24.

Thanks Ingo!

-- 
Jens Axboe

--
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/