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

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Message-ID: <20080114083901.GA17897@infradead.org>
Date:	Mon, 14 Jan 2008 08:39:01 +0000
From:	Christoph Hellwig <hch@...radead.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Jens Axboe <jens.axboe@...cle.com>,
	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,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [patch] block: fix blktrace timestamps

Folks, this is getting a little silly.

Even if CONFIG_NO_HZ is new this is a an important regression, and
yes we should avoid regressions wherever we can, and for such a quite
important feature we should fix it.  On the other hand blktrace is using
the wrong interface, and it has been told multiple times on lkml that
sched_clock() should never ever be used outside the scheduler.  So the
burden to fix this regression lies on the shoulders of the blktrace
maintainer.

No need for silly name calling here.

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