From: Don Dutile <ddutile@redhat.com>
To: Yinghai Lu <yinghai@kernel.org>
Cc: Richard Yang <weiyang@linux.vnet.ibm.com>,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: One problem in reassign pci bus number?
Date: Tue, 24 Apr 2012 22:56:46 -0400 [thread overview]
Message-ID: <4F9767EE.4010709@redhat.com> (raw)
In-Reply-To: <CAE9FiQVNYC1e_cHpLqsUcTCHWhzV_w0W=hVF8vkxtadjN45CWg@mail.gmail.com>
On 04/23/2012 06:07 PM, Yinghai Lu wrote:
> On Mon, Apr 23, 2012 at 2:09 PM, Don Dutile<ddutile@redhat.com> wrote:
>> On 04/23/2012 04:19 PM, Yinghai Lu wrote:
>>>
>>> On Mon, Apr 23, 2012 at 12:46 PM, Don Dutile<ddutile@redhat.com> wrote:
>>>>
>>>> I have run into a similar problem recently when trying to use
>>>> pci=assign-busses
>>>> with an SRIOV device behind a non-ARI-capable PCIe switch.
>>>> In this scenario, the assign-busses code assigned the next bus number,
>>>> which conflicted with an existing one on the system, and hangs the
>>>> system -- two bridges responding to the same PCI bus num evidently
>>>> confuses the hw! ;-)
>>>
>>>
>>> can you post boot log and lspci -vvxxx?
>>>
>>> Yinghai
>>
>>
>> Attached requested logs of linux-3.4-rc2 booted on RHEL6.2 installation.
>>
>> I don't have a boot log of failing condition (pci=assign-devices)
>
> what is pci=assign-devices ? you have own local patches to handle that?
>
> or you mean pci=assign-busses?
>
yes, that's what I meant. sorry, my bad... :(
>> b/c it wedges at boot, and the serial line doesn't output anything
>> even though I've tried every magic trick known with grub& kernel boot
>> params.
>> ... the PCI log btwn early boot and until the console is reconfigured is
>> 'lost'
>> on the serial line, and that's when the hang occurs.
>> It's been 'fun' to debug w/o that serial output...
>>
>> Let me know if you need something else. (lspci -t ?)
>
> can you check busn_alloc patchset fix the overlapping problem for you?
> It already split scan bus to two pass, also it will double check not
> scanned peer bridges.
>
> git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git
> for-pci-busn-alloc
>
> you can merge them to your 3.4-rc2...
>
> Thanks
>
> Yinghai
I'll try as soon as I get back to the office;
I'm out the next few days, and don't have external access to my test system.
next prev parent reply other threads:[~2012-04-25 2:56 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20120410090306.GA7056@richard>
2012-04-22 15:52 ` One problem in reassign pci bus number? Richard Yang
2012-04-23 19:46 ` Don Dutile
2012-04-23 20:19 ` Yinghai Lu
2012-04-23 21:09 ` Don Dutile
2012-04-23 22:07 ` Yinghai Lu
2012-04-25 2:56 ` Don Dutile [this message]
2012-04-23 22:22 ` Yinghai Lu
2012-04-25 2:59 ` Don Dutile
2012-04-24 7:29 ` Richard Yang
2012-05-14 1:55 ` Richard Yang
2012-05-14 5:40 ` Yinghai Lu
2012-05-14 6:46 ` Richard Yang
2012-05-15 17:32 ` Yinghai Lu
2012-05-16 1:18 ` Richard Yang
2012-05-16 2:11 ` Yinghai Lu
2012-05-29 11:59 ` Richard Yang
2012-05-29 17:14 ` Yinghai Lu
2012-06-04 13:34 ` Richard Yang
2012-06-04 23:36 ` Yinghai Lu
2012-06-05 6:26 ` Richard Yang
2012-06-05 18:01 ` Yinghai Lu
2012-04-23 20:13 ` Yinghai Lu
2012-04-24 14:56 ` Wei Yang
2012-04-25 9:47 ` Wei Yang
2012-04-25 16:28 ` Yinghai Lu
2012-05-03 6:54 ` Richard Yang
2012-05-03 8:33 ` Yinghai Lu
2012-05-04 2:47 ` Richard Yang
2012-05-04 3:15 ` Yinghai Lu
2012-05-04 4:52 ` Richard Yang
2012-05-04 17:37 ` Yinghai Lu
2012-05-06 15:17 ` Richard Yang
2012-05-06 16:35 ` Yinghai Lu
2012-05-06 16:36 ` Yinghai Lu
2012-05-07 1:17 ` Richard Yang
2012-05-07 2:04 ` Yinghai Lu
2012-05-08 2:46 ` Richard Yang
2012-05-08 3:42 ` Yinghai Lu
2012-05-10 3:35 ` Richard Yang
2012-05-10 5:42 ` Yinghai Lu
2012-05-11 1:23 ` Richard Yang
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