From: Oleg Nesterov <oleg@redhat.com>
To: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
Cc: tglx@linutronix.de, peterz@infradead.org,
paulmck@linux.vnet.ibm.com, rusty@rustcorp.com.au,
mingo@kernel.org, akpm@linux-foundation.org, namhyung@kernel.org,
vincent.guittot@linaro.org, tj@kernel.org, sbw@mit.edu,
amit.kucheria@linaro.org, rostedt@goodmis.org, rjw@sisk.pl,
wangyun@linux.vnet.ibm.com, xiaoguangrong@linux.vnet.ibm.com,
nikunj@linux.vnet.ibm.com, linux-pm@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH v3 1/9] CPU hotplug: Provide APIs to prevent CPU offline from atomic context
Date: Sun, 9 Dec 2012 21:22:34 +0100 [thread overview]
Message-ID: <20121209202234.GA5793@redhat.com> (raw)
In-Reply-To: <50C4EB79.5050203@linux.vnet.ibm.com>
On 12/10, Srivatsa S. Bhat wrote:
>
> On 12/10/2012 12:44 AM, Oleg Nesterov wrote:
>
> > But yes, it is easy to blame somebody else's code ;) And I can't suggest
> > something better at least right now. If I understand correctly, we can not
> > use, say, synchronize_sched() in _cpu_down() path
>
> We can't sleep in that code.. so that's a no-go.
But we can?
Note that I meant _cpu_down(), not get_online_cpus_atomic() or take_cpu_down().
Oleg.
next prev parent reply other threads:[~2012-12-09 20:22 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-07 17:37 [RFC PATCH v3 0/9] CPU hotplug: stop_machine()-free CPU hotplug Srivatsa S. Bhat
2012-12-07 17:38 ` [RFC PATCH v3 1/9] CPU hotplug: Provide APIs to prevent CPU offline from atomic context Srivatsa S. Bhat
2012-12-07 17:57 ` Tejun Heo
2012-12-07 18:16 ` Tejun Heo
2012-12-07 18:33 ` Srivatsa S. Bhat
2012-12-07 18:24 ` Srivatsa S. Bhat
2012-12-07 18:31 ` Tejun Heo
2012-12-07 18:38 ` Srivatsa S. Bhat
2012-12-09 19:14 ` Oleg Nesterov
2012-12-09 19:50 ` Srivatsa S. Bhat
2012-12-09 20:22 ` Oleg Nesterov [this message]
2012-12-10 4:28 ` Srivatsa S. Bhat
2012-12-10 17:24 ` Oleg Nesterov
2012-12-11 13:13 ` Srivatsa S. Bhat
2012-12-11 13:47 ` Tejun Heo
2012-12-11 14:02 ` Srivatsa S. Bhat
2012-12-11 14:07 ` Tejun Heo
2012-12-11 16:28 ` Srivatsa S. Bhat
2012-12-09 21:13 ` Oleg Nesterov
2012-12-10 5:01 ` Srivatsa S. Bhat
2012-12-10 17:28 ` Oleg Nesterov
2012-12-11 13:05 ` Srivatsa S. Bhat
2012-12-09 20:57 ` Oleg Nesterov
2012-12-10 5:19 ` Srivatsa S. Bhat
2012-12-10 18:15 ` Oleg Nesterov
2012-12-11 13:04 ` Srivatsa S. Bhat
2012-12-07 17:38 ` [RFC PATCH v3 2/9] CPU hotplug: Convert preprocessor macros to static inline functions Srivatsa S. Bhat
2012-12-07 17:38 ` [RFC PATCH v3 3/9] smp, cpu hotplug: Fix smp_call_function_*() to prevent CPU offline properly Srivatsa S. Bhat
2012-12-07 17:39 ` [RFC PATCH v3 4/9] smp, cpu hotplug: Fix on_each_cpu_*() " Srivatsa S. Bhat
2012-12-07 17:39 ` [RFC PATCH v3 5/9] sched, cpu hotplug: Use stable online cpus in try_to_wake_up() & select_task_rq() Srivatsa S. Bhat
2012-12-07 17:39 ` [RFC PATCH v3 6/9] kick_process(), cpu-hotplug: Prevent offlining of target CPU properly Srivatsa S. Bhat
2012-12-07 17:39 ` [RFC PATCH v3 7/9] yield_to(), cpu-hotplug: Prevent offlining of other CPUs properly Srivatsa S. Bhat
2012-12-09 19:48 ` Oleg Nesterov
2012-12-09 19:57 ` Srivatsa S. Bhat
2012-12-09 20:40 ` Oleg Nesterov
2012-12-10 4:04 ` Srivatsa S. Bhat
2012-12-07 17:40 ` [RFC PATCH v3 8/9] kvm, vmx: Add atomic synchronization with CPU Hotplug Srivatsa S. Bhat
2012-12-07 17:40 ` [RFC PATCH v3 9/9] cpu: No more __stop_machine() in _cpu_down() Srivatsa S. Bhat
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=20121209202234.GA5793@redhat.com \
--to=oleg@redhat.com \
--cc=akpm@linux-foundation.org \
--cc=amit.kucheria@linaro.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=namhyung@kernel.org \
--cc=nikunj@linux.vnet.ibm.com \
--cc=paulmck@linux.vnet.ibm.com \
--cc=peterz@infradead.org \
--cc=rjw@sisk.pl \
--cc=rostedt@goodmis.org \
--cc=rusty@rustcorp.com.au \
--cc=sbw@mit.edu \
--cc=srivatsa.bhat@linux.vnet.ibm.com \
--cc=tglx@linutronix.de \
--cc=tj@kernel.org \
--cc=vincent.guittot@linaro.org \
--cc=wangyun@linux.vnet.ibm.com \
--cc=xiaoguangrong@linux.vnet.ibm.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.