Re: [PATCH 1/2] iommu/vt-d: Fix PCI device reference count leak in has_external pci()

[Thorsten Leemhuis <regressions@leemhuis.info>]

On 27.12.22 08:20, Baolu Lu wrote:
> On 2022/12/26 21:29, Thorsten Leemhuis wrote:
>> [Note: this mail contains only information for Linux kernel regression
>> tracking. Mails like these contain '#forregzbot' in the subject to make
>> then easy to spot and filter out. The author also tried to remove most
>> or all individuals from the list of recipients to spare them the hassle.]
>>
>> On 25.12.22 13:11, Zeno Davatz wrote:
>>> Hi
>>>
>>> I am getting this hang with kernel 6.1. See attachment.
>>>
>>> Is this related to your patch?
>>>
>>> Kernel 6.1 does not boot for me. Kernel 6.0 was fine.
>>>
>>> Thank you for your reply.
>>
>> Thanks for the report. To be sure below issue doesn't fall through the
>> cracks unnoticed, I'm adding it to regzbot, my Linux kernel regression
>> tracking bot:
>>
>> #regzbot ^introduced v6.0..v6.1-rc1
>> #regzbot title pci(?)/iommu(?): hang with kernel 6.1
>> #regzbot ignore-activity
>>
>> Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
>>
>> P.S.: As the Linux kernel's regression tracker I deal with a lot of
>> reports and sometimes miss something important when writing mails like
>> this. If that's the case here, don't hesitate to tell me in a public
>> reply, it's in everyone's interest to set the public record straight.
>>
> 
> The reporter said that "The problem happens somewhere between Kernel
> Version 6.0 and 6.1-rc1." 

Don't worry, I know, that's why I used "#regzbot ^introduced
v6.0..v6.1-rc1" above.

> This patch only shows up since v6.1-rc8. This
> patch cannot generate any kernel regression on v6.1-rc1.

I'm not blaming the patch mentioned in the subject, but this is the
report about an regression that shouldn't be forgotten about, hence I
track it, even if the discussion uses a misleading subject (hopefully
someone will change that).

Or am I missing something here?

Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)

P.S.: As the Linux kernel's regression tracker I deal with a lot of
reports and sometimes miss something important when writing mails like
this. If that's the case here, don't hesitate to tell me in a public
reply, it's in everyone's interest to set the public record straight.