Re: [PATCH 0/2] Don't show PF_IO_WORKER in /proc/<pid>/task/

[Jens Axboe]

On 3/25/21 1:38 PM, Linus Torvalds wrote:
> On Thu, Mar 25, 2021 at 12:34 PM Eric W. Biederman
> <ebiederm@xxxxxxxxxxxx> wrote:
>>
>> A quick skim shows that these threads are not showing up anywhere in
>> proc which appears to be a problem, as it hides them from top.
>>
>> Sysadmins need the ability to dig into a system and find out where all
>> their cpu usage or io's have gone when there is a problem.  I general I
>> think this argues that these threads should show up as threads of the
>> process so I am not even certain this is the right fix to deal with gdb.
> 
> Yeah, I do think that hiding them is the wrong model, because it also
> hides them from "ps" etc, which is very wrong.

Totally agree.

> I don't know what the gdb logic is, but maybe there's some other
> option that makes gdb not react to them?

Guess it's time to dig out the gdb source... I'll take a look.

-- 
Jens Axboe