From: William Lee Irwin III <wli@holomorphy.com>
To: "Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>
Cc: "Martin J. Bligh" <mbligh@aracnet.com>,
"Nakajima, Jun" <jun.nakajima@intel.com>,
"Van Maren, Kevin" <kevin.vanmaren@unisys.com>,
Christoph Hellwig <hch@infradead.org>,
James Cleverdon <jamesclv@us.ibm.com>,
John Stultz <johnstul@us.ibm.com>,
"Mallick, Asit K" <asit.k.mallick@intel.com>,
"Saxena, Sunil" <sunil.saxena@intel.com>,
Linux Kernel <linux-kernel@vger.kernel.org>,
"Protasevich, Natalie" <Natalie.Protasevich@unisys.com>
Subject: Re: [PATCH][2.4] generic support for systems with more than 8 CPUs (2/2)
Date: Sun, 22 Dec 2002 04:17:17 -0800 [thread overview]
Message-ID: <20021222121717.GH25000@holomorphy.com> (raw)
In-Reply-To: <C8C38546F90ABF408A5961FC01FDBF1912E1B3@fmsmsx405.fm.intel.com>
On Sat, Dec 21, 2002 at 10:59:10PM -0800, Pallipadi, Venkatesh wrote:
> 2/2 : switching to physical mode APIC setup in case of more than 8 CPU system
[...]
> - printk("Enabling APIC mode: ");
> - if(clustered_apic_mode == CLUSTERED_APIC_NUMAQ)
> - printk("Clustered Logical. ");
> - else if(clustered_apic_mode == CLUSTERED_APIC_XAPIC)
> - printk("Physical. ");
> - else
> - printk("Flat. ");
> - printk("Using %d I/O APICs\n",nr_ioapics);
IIRC NUMA-Q can be dynamically detected at boot by means of an MP OEM
table's presence, in particular if there's a matching string in the 8B
OEM record in the OEM table, with a value of "IBM NUMA" IIRC. This is
probably a line or two's worth of change to mpparse.c and declaring a
variable for clustered_apic_mode. If it were difficult to detect, I
wouldn't have suggested implementing it (though do so at your leisure). =)
I still think this is 2.5 material + backport once it gets testing there.
Bill
next prev parent reply other threads:[~2002-12-22 12:10 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-22 6:59 [PATCH][2.4] generic support for systems with more than 8 CPUs (2/2) Pallipadi, Venkatesh
2002-12-22 12:17 ` William Lee Irwin III [this message]
2002-12-22 17:47 ` Martin J. Bligh
2002-12-22 22:23 ` William Lee Irwin III
2002-12-22 17:43 ` Martin J. Bligh
-- strict thread matches above, loose matches on Subject: below --
2002-12-23 1:36 Pallipadi, Venkatesh
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