From: Robert Hancock <hancockrwd@gmail.com>
To: Roland Dreier <rdreier@cisco.com>
Cc: Kurt Newman <knewman@globaldataguard.com>, linux-kernel@vger.kernel.org
Subject: Re: 2.6.32.1 kernel unable to use more than 2 of 16 CPUs on Intel E5540 (i7)
Date: Thu, 24 Jun 2010 18:23:59 -0600 [thread overview]
Message-ID: <4C23F71F.7000806@gmail.com> (raw)
In-Reply-To: <adahbksqe71.fsf@roland-alpha.cisco.com>
On 06/24/2010 04:05 PM, Roland Dreier wrote:
> Your config seems to have CONFIG_PM and therefore CONFIG_ACPI disabled.
> So the kernel is relying on mptable information. Unsurprisingly on a
> modern system, that info is probably broken -- since everything would
> have been tested with ACPI.
>
> Try turning on CONFIG_ACPI and see if that helps at all.
Indeed, not having ACPI enabled will prevent any multi-core CPU
detection. ACPI really has to be enabled for any modern x86 system to
work properly.
I'd think that the CONFIG_ACPI really should be defaulted on more
strongly - maybe force it on if CONFIG_EMBEDDED isn't set or something..
next prev parent reply other threads:[~2010-06-25 0:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-24 21:45 2.6.32.1 kernel unable to use more than 2 of 16 CPUs on Intel E5540 (i7) Kurt Newman
2010-06-24 22:05 ` Roland Dreier
2010-06-25 0:23 ` Robert Hancock [this message]
2010-06-25 21:51 ` Kurt Newman
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