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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4C23F71F.7000806@gmail.com \
--to=hancockrwd@gmail.com \
--cc=knewman@globaldataguard.com \
--cc=linux-kernel@vger.kernel.org \
--cc=rdreier@cisco.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.