From: Linus Torvalds <[email protected]>
To: "Eric W. Biederman" <[email protected]>
Cc: Jens Axboe <[email protected]>, io-uring <[email protected]>,
Linux Kernel Mailing List <[email protected]>,
Oleg Nesterov <[email protected]>,
Stefan Metzmacher <[email protected]>
Subject: Re: [PATCH 0/2] Don't show PF_IO_WORKER in /proc/<pid>/task/
Date: Thu, 25 Mar 2021 13:12:42 -0700 [thread overview]
Message-ID: <CAHk-=wgUcVeaKhtBgJO3TfE69miJq-krtL8r_Wf_=LBTJw6WSg@mail.gmail.com> (raw)
In-Reply-To: <CAHk-=wg1XpX=iAv=1HCUReMbEgeN5UogZ4_tbi+ehaHZG6d==g@mail.gmail.com>
On Thu, Mar 25, 2021 at 12:42 PM Linus Torvalds
<[email protected]> wrote:
>
> On Thu, Mar 25, 2021 at 12:38 PM Linus Torvalds
> <[email protected]> wrote:
> >
> > I don't know what the gdb logic is, but maybe there's some other
> > option that makes gdb not react to them?
>
> .. maybe we could have a different name for them under the task/
> subdirectory, for example (not just the pid)? Although that probably
> messes up 'ps' too..
Actually, maybe the right model is to simply make all the io threads
take signals, and get rid of all the special cases.
Sure, the signals will never be delivered to user space, but if we
- just made the thread loop do "get_signal()" when there are pending signals
- allowed ptrace_attach on them
they'd look pretty much like regular threads that just never do the
user-space part of signal handling.
The whole "signals are very special for IO threads" thing has caused
so many problems, that maybe the solution is simply to _not_ make them
special?
Linus
next prev parent reply other threads:[~2021-03-25 20:13 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-25 16:43 [PATCH 0/2] Don't show PF_IO_WORKER in /proc/<pid>/task/ Jens Axboe
2021-03-25 16:43 ` [PATCH 1/2] kernel: don't include PF_IO_WORKERs as part of same_thread_group() Jens Axboe
2021-03-25 16:43 ` [PATCH 2/2] proc: don't show PF_IO_WORKER threads as threads in /proc/<pid>/task/ Jens Axboe
2021-03-25 19:33 ` [PATCH 0/2] Don't show PF_IO_WORKER " Eric W. Biederman
2021-03-25 19:38 ` Linus Torvalds
2021-03-25 19:40 ` Jens Axboe
2021-03-25 19:42 ` Linus Torvalds
2021-03-25 19:46 ` Jens Axboe
2021-03-25 20:21 ` Eric W. Biederman
2021-03-25 20:40 ` Oleg Nesterov
2021-03-25 20:43 ` Jens Axboe
2021-03-25 20:48 ` Eric W. Biederman
2021-03-25 20:42 ` Jens Axboe
2021-03-25 20:12 ` Linus Torvalds [this message]
2021-03-25 20:40 ` Jens Axboe
2021-03-25 21:44 ` Jens Axboe
2021-03-25 21:57 ` Stefan Metzmacher
2021-03-26 0:11 ` Jens Axboe
2021-03-26 11:59 ` Stefan Metzmacher
2021-04-01 14:40 ` Stefan Metzmacher
2021-03-25 22:37 ` Linus Torvalds
2021-03-26 0:08 ` Jens Axboe
2021-03-25 20:43 ` Eric W. Biederman
2021-03-25 21:50 ` Jens Axboe
2021-03-25 20:44 ` Oleg Nesterov
2021-03-25 20:55 ` Eric W. Biederman
2021-03-25 21:20 ` Stefan Metzmacher
2021-03-25 21:48 ` Stefan Metzmacher
2021-03-25 19:40 ` Jens Axboe
2021-03-25 20:32 ` Oleg Nesterov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='CAHk-=wgUcVeaKhtBgJO3TfE69miJq-krtL8r_Wf_=LBTJw6WSg@mail.gmail.com' \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox