Date: Sat, 19 Oct 2013 18:20:12 +0200
From: Frederic Weisbecker <fweisbec@gmail.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Oleg Nesterov <oleg@redhat.com>, LKML <linux-kernel@vger.kernel.org>,
        Fernando Luis Vazquez Cao <fernando_b1@lab.ntt.co.jp>,
        Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
        Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Arjan van de Ven <arjan@linux.intel.com>
Subject: Re: [PATCH 4/5] sched: Refactor iowait accounting
Message-ID: <20131019162011.GB13534@localhost.localdomain>
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On Sat, Oct 19, 2013 at 06:05:17PM +0200, Peter Zijlstra wrote:
> On Sat, Oct 19, 2013 at 06:02:37PM +0200, Frederic Weisbecker wrote:
> > > I just had a look at delayacct; wth wrote that crap; that too uses
> > > gtod.
> > 
> > I can't find where it does that. kernel/delayacct.c doesn't seem to at least.
> 
> Look for do_posix_clock_monotonic_gettime() ;-)

Oh. Well that's a good news, it appears to be a nice low hanging fruit :)

Also perhaps we could make it use the same timestamp as cpu_iowait_start/end.
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