From: James Bottomley <James.Bottomley@SteelEye.com>
To: Arjan van de Ven <arjan@infradead.org>
Cc: Andrew Morton <akpm@osdl.org>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Work around for periodic do_gettimeofday hang
Date: 24 Nov 2004 22:27:38 -0600 [thread overview]
Message-ID: <1101356864.4007.35.camel@mulgrave> (raw)
In-Reply-To: <1101323621.2811.24.camel@laptop.fenrus.org>
On Wed, 2004-11-24 at 13:13, Arjan van de Ven wrote:
> while I agree with 100Hz for slower cpus, I rather have a config option for it so people
> (and distros) can select it independent of the exact cpu type they want to compile a kernel for
How about this then?
James
===== arch/i386/Kconfig 1.134 vs edited =====
--- 1.134/arch/i386/Kconfig 2004-10-21 20:35:11 -05:00
+++ edited/arch/i386/Kconfig 2004-11-24 20:56:53 -06:00
@@ -330,6 +330,14 @@
endchoice
+config X86_HZ
+ int "Clock Tick Rate"
+ default 1000 if !(M386 || M486 || M586 || M586TSC || M586MMX)
+ default 100 if (M386 || M486 || M586 || M586TSC || M586MMX)
+ help
+ Select the kernel clock tick rate in interrupts per second.
+ Slower processors should choose 100; everything else 1000.
+
config X86_GENERIC
bool "Generic x86 support"
help
===== include/asm-i386/param.h 1.6 vs edited =====
--- 1.6/include/asm-i386/param.h 2004-06-24 03:55:46 -05:00
+++ edited/include/asm-i386/param.h 2004-11-24 20:56:18 -06:00
@@ -1,8 +1,10 @@
#ifndef _ASMi386_PARAM_H
#define _ASMi386_PARAM_H
+#include <linux/config.h>
+
#ifdef __KERNEL__
-# define HZ 1000 /* Internal kernel timer frequency */
+# define HZ (CONFIG_X86_HZ)
# define USER_HZ 100 /* .. some user interfaces are in "ticks" */
# define CLOCKS_PER_SEC (USER_HZ) /* like times() */
#endif
next prev parent reply other threads:[~2004-11-25 5:02 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-24 16:49 [PATCH] Work around for periodic do_gettimeofday hang James Bottomley
2004-11-24 19:13 ` Arjan van de Ven
2004-11-25 4:27 ` James Bottomley [this message]
2004-11-25 4:33 ` Andrew Morton
2004-11-25 4:40 ` James Bottomley
2004-11-25 8:20 ` Arjan van de Ven
2004-11-27 22:38 ` Lee Revell
2004-11-25 11:18 ` Roman Zippel
2004-11-25 13:42 ` Jan Engelhardt
2004-11-25 15:47 ` Alan Cox
2004-11-25 17:33 ` James Bottomley
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