Re: [Ksummit-discuss] [CORE TOPIC] cleaning up kthread freezer hell, part 2

[Shuah Khan <shuahkhan@gmail.com>]

On Sat, Jul 9, 2016 at 12:19 AM, Julia Lawall <julia.lawall@lip6.fr> wrote:
>
>
> On Sat, 9 Jul 2016, Rafael J. Wysocki wrote:
>
>> On Saturday, July 09, 2016 12:31:33 AM Jiri Kosina wrote:
>> > On last year's kernel summit, I've been talking about why I consider
>> > kthread freezer harmful and why it ultimately should be removed. LWN
>> > coverage of that session is here:
>> >
>> >     https://lwn.net/Articles/662703/
>> >
>> > During the past year, I've invested a bit of a time into actually looking
>> > deeper into the dark corners of kernel sources to see how kthread freezer
>> > is used throughout the codebase, with the intent to ultimately fix all the
>> > buggy places. While doing that, I was petrified by two facts:
>> >
>> > - there are a *lot* of places where kthread freezer is used in a
>> >   completely buggy (or useless) way
>> >
>> > - one of the obstacles fixing it are maintainers who actually don't
>> >   understand the purpose of the kthread freezer (the usual pattern is that
>> >   the main kthread loop has been copy/pasted from different code, which
>> >   already used freezer, and so disease spreads)
>> >
>> > Therefore I'd propose a v2 of the last year's session; first summarizing
>> > the horrible experience I've done on this kthread freezer journey, and as
>> > a followup, try to (re-)explain the issue and the way I think it should be
>> > resolved.
>>
>> Yes, please.
>>
>> Let me know if/how I can help.
>
> Likewise.
>

Yes. Count me in to help out on this.

-- Shuah

>
>>
>> > The idea is to get as much coverage among high-profile maintainers as
>> > possible, in a hope that this will result in ultimate tree-wide cleanup of
>> > the current mess. That's why I propose this as a core topic rather than
>> > tech topic, although it might sound like a rather bordeline one.
>>
>> I guess that first needs to be "core" so it can become "tech" later when
>> everybody is on the same page in general.
>>
>> Thanks,
>> Rafael
>>
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