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From: William Lee Irwin III <wli@holomorphy.com>
To: Ethan Weinstein <lists@stinkfoot.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: HT apparently not detected properly on 2.4.23
Date: Wed, 3 Dec 2003 14:40:23 -0800	[thread overview]
Message-ID: <20031203224023.GV8039@holomorphy.com> (raw)
In-Reply-To: <3FCE2F8E.90104@stinkfoot.org>

On Wed, Dec 03, 2003 at 01:46:38PM -0500, Ethan Weinstein wrote:
> With 2.4.22, my Supermicro X5DPL-iGM-O (E7501 chipset) with 2 
> xeons@2.4ghz and hypertherading enabled shows 4 cpu's in 
> /proc/cpuinfo|proc/interrupts, with:
> CONFIG_ACPI=y
> CONFIG_ACPI_HT_ONLY=y
> The same config with 2.4.23 only shows 2 cpus, even with:
> CONFIG_NR_CPUS=4
> Also, I believe this has been reported before, but the system only seems 
> to interrupt on CPU0 with either kernel, unless I apply a patch I found 
> here:
> http://www.hardrock.org/kernel/2.4.22/irqbalance-2.4.22-MRC.patch
> or run the `irqbalance' program.. which I don't care to do.  This 
> problem _seems_ to be isolated to the Supermicro, as HT does seem 
> properly detected on several other SMP systems I have at work (compaq 
> ML370/ML380) with 2.4.23

You probably have sparse physical APIC ID's.


-- wli

  parent reply	other threads:[~2003-12-03 22:40 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-12-03 18:46 Ethan Weinstein
2003-12-03 19:40 ` Andre Tomt
2003-12-03 19:56   ` Mike Fedyk
2003-12-03 20:30     ` Ethan Weinstein
2003-12-03 22:40 ` William Lee Irwin III [this message]
2003-12-03 23:41   ` Ethan Weinstein
2003-12-03 23:58     ` William Lee Irwin III
2003-12-04  0:18       ` Ethan Weinstein
2003-12-05 17:12       ` Marcelo Tosatti
2003-12-05 17:48         ` William Lee Irwin III
2003-12-05 18:07           ` Re[2]: " Russell "Elik" Rademacher
     [not found]             ` <3FD0CD65.5080307@stinkfoot.org>
2003-12-05 23:02               ` Russell "Elik" Rademacher
2003-12-05 23:28                 ` Ethan Weinstein
2003-12-05 23:31                   ` Re[2]: " Russell "Elik" Rademacher
2003-12-05 23:38                     ` William Lee Irwin III
2003-12-04  0:46     ` William Lee Irwin III

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