linux-kernel - Re: [PATCH] x86: Reduce the default HZ value

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Message-ID: <20090507213403.3a75a6fb@lxorguk.ukuu.org.uk>
Date:	Thu, 7 May 2009 21:34:03 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Chris Snook <chris.snook@...il.com>
Cc:	akataria@...are.com, "H. Peter Anvin" <hpa@...or.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"the arch/x86 maintainers" <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: Reduce the default HZ value

> >> Given your use case, what you really need to do is get Red Hat,
> >> Novell, et al. on the phone and ask them to ship kernels with HZ=100,
> >> because the distributions do their own thing anyway.

As a side note Red Hat ships runtime configurable tick behaviour in RHEL
these days. HZ is fixed but the ticks can be bunched up. That was done as
a quick fix to keep stuff portable but its a lot more sensible than
randomly messing with the HZ value and its not much code either.

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