From: Yunsheng Lin <linyunsheng@huawei.com>
To: Robin Murphy <robin.murphy@arm.com>,
Christoph Hellwig <hch@infradead.org>
Cc: <bhelgaas@google.com>, <linux-pci@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <mhocko@kernel.org>,
<peterz@infradead.org>, <geert@linux-m68k.org>,
<gregkh@linuxfoundation.org>, <paul.burton@mips.com>
Subject: Re: [PATCH] PCI: Warn about host bridge device when its numa node is NO_NODE
Date: Wed, 23 Oct 2019 16:24:30 +0800 [thread overview]
Message-ID: <26918051-66bb-b27e-2ce1-7339499c5da2@huawei.com> (raw)
In-Reply-To: <e35bd451-bdb7-ec02-d691-aa3720d1e10b@arm.com>
On 2019/10/22 21:55, Robin Murphy wrote:
> On 21/10/2019 05:05, Yunsheng Lin wrote:
>> On 2019/10/19 16:34, Christoph Hellwig wrote:
>>> On Sat, Oct 19, 2019 at 02:45:43PM +0800, Yunsheng Lin wrote:
>>>> + if (nr_node_ids > 1 && dev_to_node(bus->bridge) == NUMA_NO_NODE)
>>>> + dev_err(bus->bridge, FW_BUG "No node assigned on NUMA capable HW by BIOS. Please contact your vendor for updates.\n");
>>>> +
>>>
>>> The whole idea of mentioning a BIOS in architeture indepent code doesn't
>>> make sense at all.
>
> [ Come to think of it, I'm sure an increasing number of x86 firmwares don't even implement a PC BIOS any more... ]
>
> In all fairness, the server-class Arm-based machines I've come across so far do seem to consistently call their EFI firmware images "BIOS" despite the clear anachronism. At least the absurdity of conflating a system setup program with a semiconductor process seems to have mostly died out ;)
>
>> Mentioning the BIOS is to tell user what firmware is broken, so that
>> user can report this to their vendor by referring the specific firmware.
>>
>> It seems we can specific the node through different ways(DT, ACPI, etc).
>>
>> Is there a better name for mentioning instead of BIOS, or we should do
>> the checking and warning in the architeture dependent code?
>>
>> Or maybe just remove the BIOS from the above log?
>
> Even though there may be some degree of historical convention hanging around on ACPI-based systems, that argument almost certainly doesn't hold for OF/FDT/etc. - the "[Firmware Bug]:" prefix is hopefully indicative enough, so I'd say just drop the "by BIOS" part.
Will drop the "by BIOS" part if there is another version.
Tnanks for clarifying.
>
> Robin.
>
> .
>
next prev parent reply other threads:[~2019-10-23 8:24 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-19 6:45 [PATCH] PCI: Warn about host bridge device when its numa node is NO_NODE Yunsheng Lin
2019-10-19 8:34 ` Christoph Hellwig
2019-10-21 4:05 ` Yunsheng Lin
2019-10-22 13:55 ` Robin Murphy
2019-10-23 8:24 ` Yunsheng Lin [this message]
2019-10-22 21:04 ` Bjorn Helgaas
2019-10-23 8:22 ` Yunsheng Lin
2019-10-23 17:10 ` Bjorn Helgaas
2019-10-24 9:20 ` Michal Hocko
2019-10-24 17:40 ` Bjorn Helgaas
2019-10-25 8:16 ` Michal Hocko
2019-10-25 8:51 ` Yunsheng Lin
2019-10-24 9:39 ` Yunsheng Lin
2019-10-24 10:16 ` Robin Murphy
2019-10-25 12:51 ` Bjorn Helgaas
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