From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jes Sorensen <jes@sgi.com>
Date: Thu, 29 Jun 2006 12:56:05 +0000
Subject: Re: [PATCH] ia64: change usermode HZ to 250
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To: Arjan van de Ven <arjan@infradead.org>
Cc: 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>, Jeremy Higdon <jeremy@sgi.com>

>>>>> "Arjan" = Arjan van de Ven <arjan@infradead.org> writes:

Arjan> read what Alan said: the HZ exposed to userspace is
Arjan> *constant*. For example, the i386 user visible HZ is 100, even
Arjan> if the kernel runs at a HZ of 250 or 1000.... Just when a HZ
Arjan> value gets exposed to userspace, it's transformed into a HZ0
Arjan> based value.

Arjan> And that's not a distribution thing, that's the kernel.org
Arjan> kernel honoring the stable-userspace-interface contract, and
Arjan> common sense..

See what you mean, thanks.

Jes