From: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
To: Rusty Russell <rusty@rustcorp.com.au>
Cc: linux-doc@vger.kernel.org, peterz@infradead.org,
fweisbec@gmail.com, linux-kernel@vger.kernel.org,
walken@google.com, mingo@kernel.org, linux-arch@vger.kernel.org,
linux@arm.linux.org.uk, xiaoguangrong@linux.vnet.ibm.com,
wangyun@linux.vnet.ibm.com, paulmck@linux.vnet.ibm.com,
nikunj@linux.vnet.ibm.com, linux-pm@vger.kernel.org,
rostedt@goodmis.org, rjw@sisk.pl, namhyung@kernel.org,
tglx@linutronix.de, linux-arm-kernel@lists.infradead.org,
netdev@vger.kernel.org, oleg@redhat.com,
vincent.guittot@linaro.org, sbw@mit.edu, tj@kernel.org,
akpm@linux-foundation.org, linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH v6 00/46] CPU hotplug: stop_machine()-free CPU hotplug
Date: Tue, 26 Feb 2013 03:15:05 +0530 [thread overview]
Message-ID: <512BDB61.1010204@linux.vnet.ibm.com> (raw)
In-Reply-To: <87mwuxfatp.fsf@rustcorp.com.au>
On 02/22/2013 06:01 AM, Rusty Russell wrote:
> "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com> writes:
>> Hi,
>>
>> This patchset removes CPU hotplug's dependence on stop_machine() from the CPU
>> offline path and provides an alternative (set of APIs) to preempt_disable() to
>> prevent CPUs from going offline, which can be invoked from atomic context.
>> The motivation behind the removal of stop_machine() is to avoid its ill-effects
>> and thus improve the design of CPU hotplug. (More description regarding this
>> is available in the patches).
>
> If you're doing a v7, please put your benchmark results somewhere!
>
Oh, I forgot to put them in v6! Thanks for reminding :-)
And yes, I'll have to do a v7 to incorporate changes (if any) to the new code
that went in during this merge window.
> The obvious place is in the 44/46.
>
Ok, will add it there. Thank you!
Regards,
Srivatsa S. Bhat
next prev parent reply other threads:[~2013-02-25 21:47 UTC|newest]
Thread overview: 115+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-18 12:38 [PATCH v6 00/46] CPU hotplug: stop_machine()-free CPU hotplug Srivatsa S. Bhat
2013-02-18 12:38 ` [PATCH v6 01/46] percpu_rwlock: Introduce the global reader-writer lock backend Srivatsa S. Bhat
2013-02-18 12:38 ` [PATCH v6 02/46] percpu_rwlock: Introduce per-CPU variables for the reader and the writer Srivatsa S. Bhat
2013-02-18 12:38 ` [PATCH v6 03/46] percpu_rwlock: Provide a way to define and init percpu-rwlocks at compile time Srivatsa S. Bhat
2013-02-18 12:38 ` [PATCH v6 04/46] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks Srivatsa S. Bhat
2013-02-18 15:45 ` Michel Lespinasse
2013-02-18 16:21 ` Srivatsa S. Bhat
2013-02-18 16:31 ` Steven Rostedt
2013-02-18 16:46 ` Srivatsa S. Bhat
2013-02-18 17:56 ` Srivatsa S. Bhat
2013-02-18 18:07 ` Michel Lespinasse
2013-02-18 18:14 ` Srivatsa S. Bhat
2013-02-25 15:53 ` Lai Jiangshan
2013-02-25 19:26 ` Srivatsa S. Bhat
2013-02-26 0:17 ` Lai Jiangshan
2013-02-26 0:19 ` Lai Jiangshan
2013-02-26 9:02 ` Srivatsa S. Bhat
2013-02-26 12:59 ` Lai Jiangshan
2013-02-26 14:22 ` Srivatsa S. Bhat
2013-02-26 16:25 ` Lai Jiangshan
2013-02-26 19:30 ` Srivatsa S. Bhat
2013-02-27 0:33 ` Lai Jiangshan
2013-02-27 21:19 ` Srivatsa S. Bhat
2013-03-01 17:44 ` [PATCH] lglock: add read-preference local-global rwlock Lai Jiangshan
2013-03-01 17:53 ` Tejun Heo
2013-03-01 20:06 ` Srivatsa S. Bhat
2013-03-01 18:28 ` Oleg Nesterov
2013-03-02 12:13 ` Michel Lespinasse
2013-03-02 13:14 ` [PATCH V2] " Lai Jiangshan
2013-03-02 17:11 ` Srivatsa S. Bhat
2013-03-05 15:41 ` Lai Jiangshan
2013-03-05 17:55 ` Srivatsa S. Bhat
2013-03-02 17:20 ` Oleg Nesterov
2013-03-03 17:40 ` Oleg Nesterov
2013-03-05 1:37 ` Michel Lespinasse
2013-03-05 15:27 ` Lai Jiangshan
2013-03-05 16:19 ` Michel Lespinasse
2013-03-05 16:41 ` Oleg Nesterov
2013-03-02 17:06 ` [PATCH] " Oleg Nesterov
2013-03-05 15:54 ` Lai Jiangshan
2013-03-05 16:32 ` Michel Lespinasse
2013-03-05 16:35 ` Oleg Nesterov
2013-03-02 13:42 ` Lai Jiangshan
2013-03-02 17:01 ` Oleg Nesterov
2013-03-01 17:50 ` [PATCH v6 04/46] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks Lai Jiangshan
2013-03-01 19:47 ` Srivatsa S. Bhat
2013-03-05 16:25 ` Lai Jiangshan
2013-03-05 18:27 ` Srivatsa S. Bhat
2013-03-01 18:10 ` Tejun Heo
2013-03-01 19:59 ` Srivatsa S. Bhat
2013-02-27 11:11 ` Michel Lespinasse
2013-02-27 19:25 ` Oleg Nesterov
2013-02-28 11:34 ` Michel Lespinasse
2013-02-28 18:00 ` Oleg Nesterov
2013-02-28 18:20 ` Oleg Nesterov
2013-02-26 13:34 ` Lai Jiangshan
2013-02-26 15:17 ` Srivatsa S. Bhat
2013-02-26 14:17 ` Lai Jiangshan
2013-02-26 14:37 ` Srivatsa S. Bhat
2013-02-18 12:39 ` [PATCH v6 05/46] percpu_rwlock: Make percpu-rwlocks IRQ-safe, optimally Srivatsa S. Bhat
2013-02-18 12:39 ` [PATCH v6 06/46] percpu_rwlock: Rearrange the read-lock code to fastpath nested percpu readers Srivatsa S. Bhat
2013-02-18 12:39 ` [PATCH v6 07/46] percpu_rwlock: Allow writers to be readers, and add lockdep annotations Srivatsa S. Bhat
2013-02-18 15:51 ` Michel Lespinasse
2013-02-18 16:31 ` Srivatsa S. Bhat
2013-02-18 12:39 ` [PATCH v6 08/46] CPU hotplug: Provide APIs to prevent CPU offline from atomic context Srivatsa S. Bhat
2013-02-18 16:23 ` Michel Lespinasse
2013-02-18 16:43 ` Srivatsa S. Bhat
2013-02-18 17:21 ` Michel Lespinasse
2013-02-18 18:50 ` Srivatsa S. Bhat
2013-02-19 9:40 ` Michel Lespinasse
2013-02-19 9:55 ` Srivatsa S. Bhat
2013-02-19 10:42 ` David Laight
2013-02-19 10:58 ` Srivatsa S. Bhat
2013-02-18 12:39 ` [PATCH v6 09/46] CPU hotplug: Convert preprocessor macros to static inline functions Srivatsa S. Bhat
2013-02-18 12:39 ` [PATCH v6 10/46] smp, cpu hotplug: Fix smp_call_function_*() to prevent CPU offline properly Srivatsa S. Bhat
2013-02-18 12:39 ` [PATCH v6 11/46] smp, cpu hotplug: Fix on_each_cpu_*() " Srivatsa S. Bhat
2013-02-18 12:40 ` [PATCH v6 12/46] sched/timer: Use get/put_online_cpus_atomic() to prevent CPU offline Srivatsa S. Bhat
2013-02-18 12:40 ` [PATCH v6 13/46] sched/migration: Use raw_spin_lock/unlock since interrupts are already disabled Srivatsa S. Bhat
2013-02-18 12:40 ` [PATCH v6 14/46] sched/rt: Use get/put_online_cpus_atomic() to prevent CPU offline Srivatsa S. Bhat
2013-02-18 12:40 ` [PATCH v6 15/46] tick: " Srivatsa S. Bhat
2013-02-18 12:40 ` [PATCH v6 16/46] time/clocksource: " Srivatsa S. Bhat
2013-02-18 12:40 ` [PATCH v6 17/46] clockevents: Use get/put_online_cpus_atomic() in clockevents_notify() Srivatsa S. Bhat
2013-02-18 12:40 ` [PATCH v6 18/46] softirq: Use get/put_online_cpus_atomic() to prevent CPU offline Srivatsa S. Bhat
2013-02-18 12:40 ` [PATCH v6 19/46] irq: " Srivatsa S. Bhat
2013-02-18 12:41 ` [PATCH v6 20/46] net: " Srivatsa S. Bhat
2013-02-18 12:41 ` [PATCH v6 21/46] block: " Srivatsa S. Bhat
2013-02-18 12:41 ` [PATCH v6 22/46] crypto: pcrypt - Protect access to cpu_online_mask with get/put_online_cpus() Srivatsa S. Bhat
2013-02-18 12:41 ` [PATCH v6 23/46] infiniband: ehca: Use get/put_online_cpus_atomic() to prevent CPU offline Srivatsa S. Bhat
2013-02-18 12:41 ` [PATCH v6 24/46] [SCSI] fcoe: " Srivatsa S. Bhat
2013-02-18 12:41 ` [PATCH v6 25/46] staging: octeon: " Srivatsa S. Bhat
2013-02-18 12:41 ` [PATCH v6 26/46] x86: " Srivatsa S. Bhat
2013-02-18 12:42 ` [PATCH v6 27/46] perf/x86: " Srivatsa S. Bhat
2013-02-18 12:42 ` [PATCH v6 28/46] KVM: Use get/put_online_cpus_atomic() to prevent CPU offline from atomic context Srivatsa S. Bhat
2013-02-18 12:42 ` [PATCH v6 29/46] kvm/vmx: Use get/put_online_cpus_atomic() to prevent CPU offline Srivatsa S. Bhat
2013-02-18 12:42 ` [PATCH v6 30/46] x86/xen: " Srivatsa S. Bhat
2013-02-18 12:42 ` [PATCH v6 31/46] alpha/smp: " Srivatsa S. Bhat
2013-02-18 12:42 ` [PATCH v6 32/46] blackfin/smp: " Srivatsa S. Bhat
2013-02-18 12:42 ` [PATCH v6 33/46] cris/smp: " Srivatsa S. Bhat
2013-02-18 13:07 ` Jesper Nilsson
2013-02-18 12:43 ` [PATCH v6 34/46] hexagon/smp: " Srivatsa S. Bhat
2013-02-18 12:43 ` [PATCH v6 35/46] ia64: " Srivatsa S. Bhat
2013-02-18 12:43 ` [PATCH v6 36/46] m32r: " Srivatsa S. Bhat
2013-02-18 12:43 ` [PATCH v6 37/46] MIPS: " Srivatsa S. Bhat
2013-02-18 12:43 ` [PATCH v6 38/46] mn10300: " Srivatsa S. Bhat
2013-02-18 12:43 ` [PATCH v6 39/46] parisc: " Srivatsa S. Bhat
2013-02-18 12:43 ` [PATCH v6 40/46] powerpc: " Srivatsa S. Bhat
2013-02-18 12:44 ` [PATCH v6 41/46] sh: " Srivatsa S. Bhat
2013-02-18 12:44 ` [PATCH v6 42/46] sparc: " Srivatsa S. Bhat
2013-02-18 12:44 ` [PATCH v6 43/46] tile: " Srivatsa S. Bhat
2013-02-18 12:44 ` [PATCH v6 44/46] cpu: No more __stop_machine() in _cpu_down() Srivatsa S. Bhat
2013-02-18 12:44 ` [PATCH v6 45/46] CPU hotplug, stop_machine: Decouple CPU hotplug from stop_machine() in Kconfig Srivatsa S. Bhat
2013-02-18 12:44 ` [PATCH v6 46/46] Documentation/cpu-hotplug: Remove references to stop_machine() Srivatsa S. Bhat
2013-02-22 0:31 ` [PATCH v6 00/46] CPU hotplug: stop_machine()-free CPU hotplug Rusty Russell
2013-02-25 21:45 ` Srivatsa S. Bhat [this message]
2013-03-01 12:05 ` Vincent Guittot
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