From: Clemens Ladisch <clemens@ladisch.de>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: akpm@linux-foundation.org, John Stultz <johnstul@us.ibm.com>,
maglyx@gmail.com, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [patch 1/3] hpet: factor timer allocate from open
Date: Mon, 26 Jul 2010 08:20:03 +0200 [thread overview]
Message-ID: <4C4D2913.8020200@ladisch.de> (raw)
In-Reply-To: <alpine.LFD.2.00.1007231500180.2616@localhost.localdomain>
Thomas Gleixner wrote:
> On Tue, 20 Jul 2010, akpm@linux-foundation.org wrote:
> > From: Magnus Lynch <maglyx@gmail.com>
> >
> > The current implementation of the /dev/hpet driver couples opening the
> > device with allocating one of the (scarce) timers (aka comparators). This
> > is a limitation in that the main counter may be valuable to applications
> > seeking a high-resolution timer who have no use for the interrupt
> > generating functionality of the comparators.
>
> And how exactly does this patch provide such functionality ? There is
> no interface which allows you to access the counter itself.
Through mmap(); this is the only interface of /dev/hpet that is actually
used in practice.
> Cc: Clemens Ladisch <clemens@ladisch.de>
Acked-by: Clemens Ladisch <clemens@ladisch.de>
Regards,
Clemens
next prev parent reply other threads:[~2010-07-26 6:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <201007202223.o6KMNDZl021345@imap1.linux-foundation.org>
2010-07-23 13:07 ` [patch 1/3] hpet: factor timer allocate from open Thomas Gleixner
2010-07-26 6:20 ` Clemens Ladisch [this message]
2010-07-26 20:36 ` Mag
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