From: qianli zhao <zhaoqianligood@gmail.com>
To: Oleg Nesterov <oleg@redhat.com>
Cc: christian@brauner.io, axboe@kernel.dk,
"Eric W. Biederman" <ebiederm@xmission.com>,
Thomas Gleixner <tglx@linutronix.de>,
Peter Collingbourne <pcc@google.com>,
linux-kernel@vger.kernel.org, Qianli Zhao <zhaoqianli@xiaomi.com>
Subject: Re: [PATCH V3] exit: trigger panic when global init has exited
Date: Thu, 25 Mar 2021 11:00:11 +0800 [thread overview]
Message-ID: <CAPx_LQFgXy5EgP0Z48pguyDo9JH5u7a9+d-YXgfCVYFygB500A@mail.gmail.com> (raw)
In-Reply-To: <20210324181209.GB13021@redhat.com>
>> But,my patch has another purpose,protect some key variables(such
>> as:task->mm,task->nsproxy,etc) to recover init coredump from
>> fulldump,if sub-threads finish do_exit(),
> Yes I know.
> But the purpose of this SIGNAL_GROUP_EXIT check is not clear and not
> documented. That is why I said it should be documented at least in the
> changelog.
Ok.
I will update the changelog as you suggest.
Oleg Nesterov <oleg@redhat.com> 于2021年3月25日周四 上午2:12写道:
>
> Hi,
>
> On 03/23, qianli zhao wrote:
> >
> > Hi,Oleg
> >
> > > You certainly don't understand me :/
> >
> > > Please read my email you quoted below. I didn't mean the current logic.
> > > I meant the logic after your patch which moves atomic_dec_and_test() and
> > > panic() before exit_signals().
> >
> > Sorry, I think I see what you mean now.
> >
> > You mean that after apply my patch,SIGNAL_GROUP_EXIT no longer needs
> > to be tested or avoid zap_pid_ns_processes()->BUG().
> > Yes,your consideration is correct.
>
> OK, great
>
> > But,my patch has another purpose,protect some key variables(such
> > as:task->mm,task->nsproxy,etc) to recover init coredump from
> > fulldump,if sub-threads finish do_exit(),
>
> Yes I know.
>
> But the purpose of this SIGNAL_GROUP_EXIT check is not clear and not
> documented. That is why I said it should be documented at least in the
> changelog.
>
> Oleg.
>
prev parent reply other threads:[~2021-03-25 3:01 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-17 12:51 [PATCH V3] exit: trigger panic when global init has exited Qianli Zhao
2021-03-17 14:38 ` Oleg Nesterov
2021-03-18 2:47 ` qianli zhao
2021-03-18 18:04 ` Oleg Nesterov
2021-03-18 19:08 ` Eric W. Biederman
2021-03-19 6:33 ` qianli zhao
2021-03-19 16:34 ` Oleg Nesterov
2021-03-19 16:26 ` Oleg Nesterov
2021-03-21 16:00 ` qianli zhao
2021-03-22 17:07 ` Oleg Nesterov
2021-03-22 17:09 ` Oleg Nesterov
2021-03-19 5:08 ` qianli zhao
2021-03-19 16:32 ` Oleg Nesterov
2021-03-21 13:04 ` qianli zhao
2021-03-22 16:37 ` Oleg Nesterov
2021-03-23 3:14 ` qianli zhao
2021-03-23 9:00 ` Oleg Nesterov
2021-03-23 11:23 ` qianli zhao
2021-03-24 18:12 ` Oleg Nesterov
2021-03-25 3:00 ` qianli zhao [this message]
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