From: Tejun Heo <tj@kernel.org>
To: Len Brown <lenb@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] x86, acpi: Make acpi_processor_ffh_cstate_probe() use a work item instead of work_on_cpu()
Date: Mon, 17 Sep 2012 14:37:38 -0700 [thread overview]
Message-ID: <20120917213738.GM18677@google.com> (raw)
In-Reply-To: <20120824002643.GA21325@google.com>
On Thu, Aug 23, 2012 at 05:26:43PM -0700, Tejun Heo wrote:
> Workqueue is guaranteed to be available on the target CPU by the time
> acpi_processor_ffh_cstate_probe() is invoked for it. There's no
> reason to use costly work_on_cpu() which involves creating and tearing
> down a full kthread on each invocation to execute the probing function
> on the target CPU. Use a work item instead.
>
> Tested and works as expected.
>
> Signed-off-by: Tejun Heo <tj@kernel.org>
Please forget about this patch (doesn't seem like it has been applied
yet). Planning on reimplementing work_on_cpu() using system_wq
instead.
Thanks.
--
tejun
prev parent reply other threads:[~2012-09-17 21:37 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-24 0:26 [PATCH] x86, acpi: Make acpi_processor_ffh_cstate_probe() use a work item instead of work_on_cpu() Tejun Heo
2012-09-17 21:37 ` Tejun Heo [this message]
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