From: Oleg Nesterov <oleg@redhat.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Sridhar Samudrala <sri@us.ibm.com>, Tejun Heo <tj@kernel.org>,
"Michael S. Tsirkin" <mst@redhat.com>,
Ingo Molnar <mingo@elte.hu>, netdev <netdev@vger.kernel.org>,
lkml <linux-kernel@vger.kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Dmitri Vorobiev <dmitri.vorobiev@movial.com>,
Jiri Kosina <jkosina@suse.cz>,
Thomas Gleixner <tglx@linutronix.de>,
Andi Kleen <ak@linux.intel.com>
Subject: Re: [PATCH repost] sched: export sched_set/getaffinity to modules
Date: Fri, 2 Jul 2010 23:06:37 +0200 [thread overview]
Message-ID: <20100702210637.GA12433@redhat.com> (raw)
In-Reply-To: <1278094270.1917.288.camel@laptop>
On 07/02, Peter Zijlstra wrote:
>
> On Fri, 2010-07-02 at 11:01 -0700, Sridhar Samudrala wrote:
> >
> > Does it (Tejun's kthread_clone() patch) also inherit the
> > cgroup of the caller?
>
> Of course, its a simple do_fork() which inherits everything just as you
> would expect from a similar sys_clone()/sys_fork() call.
Yes. And I'm afraid it can inherit more than we want. IIUC, this is called
from ioctl(), right?
Then the new thread becomes the natural child of the caller, and it shares
->mm with the parent. And files, dup_fd() without CLONE_FS.
Signals. Say, if you send SIGKILL to this new thread, it can't sleep in
TASK_INTERRUPTIBLE or KILLABLE after that. And this SIGKILL can be sent
just because the parent gets SIGQUIT or abother coredumpable signal.
Or the new thread can recieve SIGSTOP via ^Z.
Perhaps this is OK, I do not know. Just to remind that kernel_thread()
is merely clone(CLONE_VM).
Oleg.
next prev parent reply other threads:[~2010-07-02 21:06 UTC|newest]
Thread overview: 115+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-19 0:04 [PATCH 2/3] workqueue: Add an API to create a singlethread workqueue attached to the current task's cgroup Sridhar Samudrala
2010-05-27 9:14 ` Michael S. Tsirkin
2010-05-27 12:44 ` Oleg Nesterov
2010-05-27 13:12 ` Michael S. Tsirkin
2010-05-27 13:48 ` Oleg Nesterov
2010-05-27 16:15 ` Tejun Heo
2010-05-27 16:39 ` Michael S. Tsirkin
2010-05-27 16:56 ` Tejun Heo
2010-05-27 17:32 ` Michael S. Tsirkin
2010-05-27 21:20 ` Tejun Heo
2010-05-28 15:08 ` Michael S. Tsirkin
2010-05-28 15:54 ` Tejun Heo
2010-05-30 11:29 ` Michael S. Tsirkin
2010-05-30 20:24 ` [PATCH 1/3] vhost: replace vhost_workqueue with per-vhost kthread Tejun Heo
2010-05-31 14:39 ` Oleg Nesterov
2010-05-31 15:07 ` Tejun Heo
2010-05-31 15:31 ` Oleg Nesterov
2010-05-31 15:38 ` Tejun Heo
2010-05-31 15:22 ` Michael S. Tsirkin
2010-05-31 15:45 ` Tejun Heo
2010-05-31 16:00 ` Michael S. Tsirkin
2010-06-01 9:34 ` Tejun Heo
2010-06-02 18:40 ` [PATCH UPDATED " Tejun Heo
2010-06-02 21:34 ` Sridhar Samudrala
2010-07-22 15:58 ` Michael S. Tsirkin
2010-07-22 21:21 ` Tejun Heo
2010-07-24 19:14 ` Michael S. Tsirkin
2010-07-25 7:41 ` Tejun Heo
2010-07-25 10:04 ` Michael S. Tsirkin
2010-07-26 15:25 ` Michael S. Tsirkin
2010-07-26 15:34 ` Tejun Heo
2010-07-26 15:46 ` Tejun Heo
2010-07-26 15:51 ` Michael S. Tsirkin
2010-07-26 15:50 ` Michael S. Tsirkin
2010-07-26 16:05 ` Tejun Heo
2010-07-26 16:14 ` Tejun Heo
2010-07-26 16:31 ` Michael S. Tsirkin
2010-07-26 18:51 ` Tejun Heo
2010-07-26 19:57 ` Michael S. Tsirkin
2010-07-27 8:18 ` Tejun Heo
2010-07-26 16:51 ` Michael S. Tsirkin
2010-07-26 19:14 ` Tejun Heo
2010-07-26 19:31 ` Tejun Heo
2010-07-26 19:59 ` Michael S. Tsirkin
2010-07-27 19:19 ` Michael S. Tsirkin
2010-07-28 7:48 ` Tejun Heo
2010-07-28 10:48 ` Michael S. Tsirkin
2010-07-28 12:00 ` Tejun Heo
2010-07-26 16:57 ` Michael S. Tsirkin
2010-07-26 16:23 ` Michael S. Tsirkin
2010-07-26 19:04 ` Tejun Heo
2010-07-26 20:19 ` Michael S. Tsirkin
2010-07-27 8:21 ` Tejun Heo
2010-06-01 9:34 ` [PATCH 2/3] cgroups: Add an API to attach a task to current task's cgroup Tejun Heo
2010-06-01 9:35 ` [PATCH 3/3] vhost: apply cpumask and cgroup to vhost workers Tejun Heo
2010-06-01 10:17 ` Michael S. Tsirkin
2010-06-01 10:56 ` Tejun Heo
2010-06-01 17:19 ` Sridhar Samudrala
2010-06-01 23:59 ` Tejun Heo
2010-06-01 14:13 ` [PATCH 1/3] vhost: replace vhost_workqueue with per-vhost kthread Paul E. McKenney
2010-05-30 20:24 ` [PATCH 2/3] cgroups: Add an API to attach a task to current task's cgroup Tejun Heo
2010-05-31 1:07 ` Li Zefan
2010-05-31 7:00 ` Tejun Heo
2010-05-30 20:25 ` [PATCH 3/3] vhost: apply cpumask and cgroup to vhost pollers Tejun Heo
2010-05-31 1:11 ` Li Zefan
2010-05-31 6:58 ` [PATCH UPDATED " Tejun Heo
2010-05-31 7:48 ` Li Zefan
2010-05-31 10:20 ` [PATCH UPDATED2 " Tejun Heo
2010-06-24 8:11 ` [PATCH " Michael S. Tsirkin
2010-06-24 22:45 ` Sridhar Samudrala
2010-06-25 10:10 ` [PATCH] sched: export sched_set/getaffinity (was Re: [PATCH 3/3] vhost: apply cpumask and cgroup to vhost pollers) Michael S. Tsirkin
2010-07-01 11:07 ` [PATCH repost] sched: export sched_set/getaffinity to modules Michael S. Tsirkin
2010-07-01 11:19 ` Peter Zijlstra
2010-07-01 11:43 ` Peter Zijlstra
2010-07-01 11:55 ` Michael S. Tsirkin
2010-07-01 12:23 ` Michael S. Tsirkin
2010-07-01 12:34 ` Peter Zijlstra
2010-07-01 12:46 ` Peter Zijlstra
2010-07-01 13:08 ` Michael S. Tsirkin
2010-07-01 13:30 ` Peter Zijlstra
2010-07-01 13:39 ` Michael S. Tsirkin
2010-07-01 13:57 ` Peter Zijlstra
2010-07-01 14:27 ` Tejun Heo
2010-07-01 14:46 ` Oleg Nesterov
2010-07-01 14:53 ` Tejun Heo
2010-07-01 14:55 ` Peter Zijlstra
2010-07-02 18:01 ` Sridhar Samudrala
2010-07-02 18:11 ` Peter Zijlstra
2010-07-02 21:06 ` Oleg Nesterov [this message]
2010-07-04 9:00 ` Michael S. Tsirkin
2010-07-13 6:59 ` Sridhar Samudrala
2010-07-13 11:09 ` Michael S. Tsirkin
2010-07-14 23:26 ` Sridhar Samudrala
2010-07-15 0:05 ` Oleg Nesterov
2010-07-15 5:29 ` Sridhar Samudrala
2010-07-26 17:12 ` Michael S. Tsirkin
2010-07-26 17:51 ` Sridhar Samudrala
2010-07-26 18:08 ` Oleg Nesterov
2010-07-26 19:55 ` Michael S. Tsirkin
2010-07-26 20:27 ` Michael S. Tsirkin
2010-07-27 4:55 ` Michael S. Tsirkin
2010-08-04 10:45 ` Peter Zijlstra
2010-07-27 15:41 ` Michael S. Tsirkin
2010-07-30 14:19 ` Oleg Nesterov
2010-07-30 14:31 ` Tejun Heo
2010-08-01 8:50 ` Michael S. Tsirkin
2010-08-02 15:02 ` Oleg Nesterov
2010-07-01 14:33 ` Oleg Nesterov
2010-07-01 12:32 ` Peter Zijlstra
2010-07-01 12:50 ` Michael S. Tsirkin
2010-07-01 13:07 ` Peter Zijlstra
2010-07-01 13:22 ` Michael S. Tsirkin
2010-05-27 16:24 ` [PATCH 2/3] workqueue: Add an API to create a singlethread workqueue attached to the current task's cgroup Sridhar Samudrala
2010-05-27 16:41 ` Michael S. Tsirkin
2010-05-27 17:30 ` Oleg Nesterov
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