From: Neil Conway <nconway.list@ukaea.org.uk>
To: Robert Love <rml@tech9.net>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] 2.4: variable HZ
Date: Mon, 21 Oct 2002 09:15:32 +0100 [thread overview]
Message-ID: <3DB3B7A4.C40C1995@ukaea.org.uk> (raw)
In-Reply-To: 1034966657.722.838.camel@phantasy
Robert Love wrote:
> OK, sure, but why specify a power-of-two HZ? There is absolutely no
> reason to, at least on x86.
Totally agree. However, I wasn't restricting it to powers of two. You
just happened to have mentioned 512 (wrt. RedHat).
> Want 512? 500 will do just as well and has the benefit of (a) being a
> multiple of the previous HZ and (b) evenly dividing into our concept of
> time.
512 ~= 500. 150 !~= 100. Would someone want to use 150? Maybe...
Anyway, it's no big deal if you prefer to leave your patch as-is.
However, if you do, then you need to at least add a comment to the code
and modify the Configure.help to make it clear that only integer
multiples work properly. In fact, you could just make the HZ Config
value be a "speed-up ratio" which would make various bits of the patch
cleaner.
Neil
next prev parent reply other threads:[~2002-10-21 8:05 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-18 11:51 [PATCH] 2.4: variable HZ Neil Conway
2002-10-18 18:44 ` Robert Love
2002-10-18 19:38 ` Richard B. Johnson
2002-10-19 7:04 ` jdow
2002-10-21 13:13 ` Richard B. Johnson
2002-10-19 9:36 ` Willy Tarreau
2002-10-21 8:15 ` Neil Conway [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-10-15 6:03 Robert Love
2002-10-15 6:50 ` Robert Love
2002-10-18 18:27 ` Tim Schmielau
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