linux-kernel - Re: SNB PCI root information

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAE9FiQUOWjLz86JZQrN-v1PdKfLAV022CPrjeArmYM5bRD+drA@mail.gmail.com>
Date:	Fri, 22 Jun 2012 13:41:35 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Brice Goglin <brice.goglin@...il.com>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Ulrich Drepper <drepper@...il.com>, jbarnes@...tuousgeek.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	lenb@...nel.org, x86@...nel.org, linux-pci@...r.kernel.org
Subject: Re: SNB PCI root information

On Fri, Jun 22, 2012 at 1:38 PM, Brice Goglin <brice.goglin@...il.com> wrote:
> Le 22/06/2012 19:28, Yinghai Lu a écrit :
>> On Fri, Jun 22, 2012 at 12:14 AM, Brice Goglin <brice.goglin@...il.com> wrote:
>>
>>>> BIOS _PXM return 0 for both pci root buses?
>>>>
>>> Here's dmesg.
>>> I can't say for sure whether _PXM returns 0 since I don't know how to
>>> read all this :) But Linux puts the first socket cpumap in
>>> /sys/bus/pci/devices/*/local_cpus (and that's wrong according to the
>>> motherboard manual and according to the performance we see).
>>>
>> hi, looks like you system bios does not provide _PXM for the root bus.
>>
>
> So why does Linux say that all buses are close to socket 0 instead of
> close to everything as usual?

        if (bus && node != -1) {
#ifdef CONFIG_ACPI_NUMA
                if (pxm >= 0)
                        dev_printk(KERN_DEBUG, &bus->dev,
                                   "on NUMA node %d (pxm %d)\n", node, pxm);
#else
                dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
#endif
        }

so can you boot with "debug ignore_loglevel" ?

Thanks

Yinghai
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/