From: "David Mosberger-Tang" <David.Mosberger@acm.org>
To: Jeremy Higdon <jeremy@sgi.com>
Cc: Arjan van de Ven <arjan@infradead.org>,
Jes Sorensen <jes@sgi.com>, Alan Cox <alan@lxorguk.ukuu.org.uk>,
"Luck, Tony" <tony.luck@intel.com>,
John Daiker <jdaiker@osdl.org>, John Hawkes <hawkes@sgi.com>,
Tony Luck <tony.luck@gmail.com>, Andrew Morton <akpm@osdl.org>,
linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org,
Jack Steiner <steiner@sgi.com>, Dan Higgins <djh@sgi.com>
Subject: Re: [PATCH] ia64: change usermode HZ to 250
Date: Wed, 12 Jul 2006 02:02:37 +0000 [thread overview]
Message-ID: <ed5aea430607111902i91b9e92s784ce8d2103f1b4e@mail.gmail.com> (raw)
In-Reply-To: <20060711183754.GB734242@sgi.com>
On 7/11/06, Jeremy Higdon <jeremy@sgi.com> wrote:
> Okay. So what do you think about changing the value in param.h from
> 1024, so that it matches the new common value of 250, or is it best
> just to leave it at 1024 and let applications that use it get the wrong
> result?
In my opinion, HZ needs to be a constant, since otherwise you could
break perfectly fine existing code (e.g., code which statically
initializes a variable with HZ and then picks up the correct frequency
from sysconf) and if you have to pick a particular constant, it seems
reasonable to me to pick the most commonly used frequency (which
appears to be 250Hz at the moment).
--david
--
Mosberger Consulting LLC, http://www.mosberger-consulting.com/
next prev parent reply other threads:[~2006-07-12 2:02 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-27 22:01 [PATCH] ia64: change usermode HZ to 250 hawkes
2006-06-27 22:26 ` Luck, Tony
2006-06-27 23:09 ` Lee Revell
2006-06-28 8:43 ` Arjan van de Ven
2006-06-28 10:47 ` Alan Cox
2006-06-28 10:34 ` Arjan van de Ven
2006-06-28 14:46 ` Christoph Lameter
2006-06-28 8:39 ` Arjan van de Ven
2006-06-28 15:43 ` John Hawkes
2006-06-28 16:21 ` Alan Cox
2006-06-28 16:11 ` John Daiker
2006-06-28 16:50 ` Alan Cox
2006-06-28 17:36 ` Luck, Tony
2006-06-29 9:37 ` Jes Sorensen
2006-06-29 10:46 ` Alan Cox
2006-06-29 10:48 ` Jes Sorensen
2006-06-29 10:55 ` Arjan van de Ven
2006-06-29 12:56 ` Jes Sorensen
2006-07-08 0:14 ` Jeremy Higdon
2006-07-08 2:51 ` Tony Luck
2006-07-08 6:42 ` Arjan van de Ven
2006-07-08 13:07 ` David Mosberger-Tang
2006-07-10 20:22 ` Jeremy Higdon
2006-07-11 3:01 ` David Mosberger-Tang
2006-07-11 9:53 ` Alan Cox
2006-07-11 18:37 ` Jeremy Higdon
2006-07-12 2:02 ` David Mosberger-Tang [this message]
2006-06-29 11:34 ` Alan Cox
2006-06-29 14:09 ` Albert Cahalan
2006-07-09 19:18 ` Luck, Tony
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