From: Pedro Alves <pedro@codesourcery.com>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Roland McGrath <roland@hack.frob.com>, Tejun Heo <tj@kernel.org>,
Denys Vlasenko <dvlasenk@redhat.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Matt Fleming <matt.fleming@linux.intel.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/8] make vfork killable/restartable/traceable
Date: Wed, 27 Jul 2011 23:38:14 +0100 [thread overview]
Message-ID: <201107272338.15238.pedro@codesourcery.com> (raw)
In-Reply-To: <20110727163159.GA23785@redhat.com>
On Wednesday 27 July 2011 17:31:59, Oleg Nesterov wrote:
> Hello.
>
> CLONE_VFORK sleeps in TASK_INTERRUPTIBLE until the child exits/execs.
> This is obviously not good, it is sooo simple to create the task which
> doesn't react to SIGKILL/SIGSTOP.
>
> Questions:
>
> - do we really need this?
>
> I think we do. This really "looks like a bug" in any case,
> even if nobody ever complained afaik.
>
> - may be 1-3 is enough?
>
> may be... but personally I think SIGSTOP/ptrace should work
> too.
Thanks, me too. If not SIGSTOP, then PTRACE_STOP. The fact that it
doesn't has led to the need for workarounds in gdb. Do you see
any way gdb will be able to check at runtime its workarounds
won't be needed anymore ?
--
Pedro Alves
next prev parent reply other threads:[~2011-07-27 22:45 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-27 16:31 [PATCH 0/8] make vfork killable/restartable/traceable Oleg Nesterov
2011-07-27 16:32 ` [PATCH 1/8] vfork: introduce complete_vfork_done() Oleg Nesterov
2011-07-27 16:32 ` [PATCH 2/8] vfork: introduce clone_vfork_finish() Oleg Nesterov
2011-07-27 16:32 ` [PATCH 3/8] vfork: make it killable Oleg Nesterov
2011-07-29 13:02 ` Matt Fleming
2011-07-29 14:32 ` Oleg Nesterov
2011-07-29 15:32 ` Matt Fleming
2011-07-27 16:33 ` [PATCH 4/8] coredump_wait: don't call complete_vfork_done() Oleg Nesterov
2011-07-29 13:02 ` Matt Fleming
2011-07-29 14:25 ` Oleg Nesterov
2011-07-29 15:26 ` Matt Fleming
2011-07-27 16:33 ` [PATCH 5/8] introduce find_get_task_by_vpid() Oleg Nesterov
2011-07-27 16:33 ` [PATCH 6/8] vfork: do not setup child->vfork_done beforehand Oleg Nesterov
2011-07-27 16:34 ` [PATCH 7/8] vfork: make it stoppable/traceable Oleg Nesterov
2011-07-27 16:34 ` [PATCH 8/8] vfork: do not block SIG_DFL/SIG_IGN signals is single-threaded Oleg Nesterov
2011-07-27 16:34 ` [PATCH 9/8] kill PF_STARTING Oleg Nesterov
2011-07-27 19:39 ` [PATCH 0/8] make vfork killable/restartable/traceable Linus Torvalds
2011-07-28 13:59 ` Oleg Nesterov
2011-07-28 14:58 ` Oleg Nesterov
2011-07-27 22:38 ` Pedro Alves [this message]
2011-07-29 19:23 ` Tejun Heo
2011-08-12 17:55 ` [PATCH v2 0/3] make vfork killable Oleg Nesterov
2011-08-12 17:56 ` [PATCH 1/3] vfork: introduce complete_vfork_done() Oleg Nesterov
2011-08-12 17:56 ` [PATCH 2/3] vfork: make it killable Oleg Nesterov
2011-08-19 20:33 ` Matt Fleming
2011-08-22 13:35 ` Oleg Nesterov
2011-08-12 17:56 ` [PATCH 3/3] coredump_wait: don't call complete_vfork_done() Oleg Nesterov
2011-08-17 7:50 ` Tejun Heo
2011-08-17 15:11 ` Oleg Nesterov
2011-08-12 17:57 ` [PATCH 4/3] kill PF_STARTING Oleg Nesterov
2011-08-17 7:51 ` Tejun Heo
2011-08-13 16:18 ` [PATCH v2 0/3] make vfork killable Tejun Heo
2011-08-15 19:42 ` Oleg Nesterov
2011-08-16 19:42 ` Tejun Heo
2011-08-23 22:01 ` Matt Helsley
2011-08-23 22:12 ` Tejun Heo
[not found] ` <20110727163610.GJ23793@redhat.com>
[not found] ` <20110727175624.GA3950@redhat.com>
[not found] ` <20110728154324.GA22864@redhat.com>
[not found] ` <alpine.DEB.2.00.1107281341060.16093@chino.kir.corp.google.com>
[not found] ` <20110729141431.GA3501@redhat.com>
[not found] ` <20110730143426.GA6061@redhat.com>
2011-07-30 15:22 ` mm->oom_disable_count is broken Oleg Nesterov
2011-08-01 11:52 ` KOSAKI Motohiro
2011-08-29 18:37 ` Oleg Nesterov
2011-08-29 23:17 ` David Rientjes
2011-08-30 7:43 ` [patch 1/2] oom: remove oom_disable_count David Rientjes
2011-08-30 7:43 ` [patch 2/2] oom: fix race while temporarily setting current's oom_score_adj David Rientjes
2011-08-30 15:57 ` Oleg Nesterov
2011-08-30 15:28 ` [patch 1/2] oom: remove oom_disable_count Oleg Nesterov
2011-08-30 22:06 ` David Rientjes
2011-08-30 16:17 ` mm->oom_disable_count is broken Oleg Nesterov
2011-08-10 21:44 ` [PATCH 0/8] make vfork killable/restartable/traceable Pavel Machek
2011-08-11 16:09 ` Oleg Nesterov
2011-08-11 16:22 ` Tejun Heo
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