From: Igor Zhbanov <i.zhbanov@omprussia.ru>
To: Oleg Nesterov <oleg@redhat.com>
Cc: <linux-trace-devel@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: Mutual debugging of 2 processes can stuck in unkillable stopped state
Date: Mon, 12 Apr 2021 10:25:06 +0300 [thread overview]
Message-ID: <f7c84257-70a3-e482-0d3a-8ea95cbc8b62@omprussia.ru> (raw)
In-Reply-To: <c0131d23-fb09-7622-d51d-30e094d92136@omprussia.ru>
Hi Oleg,
So what is the cause of this problem?
Thank you.
On 29.03.2021 20:44, Igor Zhbanov wrote:
>
> Here is the processes stack before sending any signals to them:
>
> izh@suse2:~> sudo cat /proc/1751/stack
> [<0>] ptrace_stop+0x14e/0x260
> [<0>] ptrace_do_notify+0x91/0xb0
> [<0>] ptrace_notify+0x4e/0x70
> [<0>] syscall_slow_exit_work+0x90/0x150
> [<0>] do_syscall_64+0x129/0x1f0
> [<0>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
>
> izh@suse2:~> sudo cat /proc/1979/stack
> [<0>] ptrace_stop+0x14e/0x260
> [<0>] get_signal+0x4d5/0x840
> [<0>] do_signal+0x30/0x6a0
> [<0>] exit_to_usermode_loop+0x8b/0x120
> [<0>] do_syscall_64+0x1c3/0x1f0
> [<0>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
>
>> Igor, thanks for your report, but (I think) this has nothing to do
>> with mutual debugging. I'll return to this problem in a couple of
>> days, I'm a bit busy right now.
next prev parent reply other threads:[~2021-04-12 7:25 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-29 15:28 Mutual debugging of 2 processes can stuck in unkillable stopped state Igor Zhbanov
2021-03-29 16:49 ` Oleg Nesterov
2021-03-29 17:01 ` Igor Zhbanov
2021-03-29 17:38 ` Oleg Nesterov
2021-03-29 17:44 ` Igor Zhbanov
2021-04-12 7:25 ` Igor Zhbanov [this message]
2021-04-13 17:17 ` 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=f7c84257-70a3-e482-0d3a-8ea95cbc8b62@omprussia.ru \
--to=i.zhbanov@omprussia.ru \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-trace-devel@vger.kernel.org \
--cc=oleg@redhat.com \
/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;
as well as URLs for NNTP newsgroup(s).