From: Tejun Heo <tj@kernel.org>
To: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Cc: gregkh@linuxfoundation.org, akpm@linux-foundation.org,
linux-kernel@vger.kernel.org, len.brown@intel.com,
rafael@kernel.org, linux-pm@vger.kernel.org,
jiangshanlai@gmail.com, pavel@ucw.cz, zwisler@kernel.org
Subject: Re: [workqueue/driver-core PATCH v2 1/5] workqueue: Provide queue_work_node to queue work near a given NUMA node
Date: Thu, 11 Oct 2018 08:04:17 -0700 [thread overview]
Message-ID: <20181011150417.GO270328@devbig004.ftw2.facebook.com> (raw)
In-Reply-To: <20181010230715.10609.83647.stgit@localhost.localdomain>
On Wed, Oct 10, 2018 at 04:07:42PM -0700, Alexander Duyck wrote:
> This patch provides a new function queue_work_node which is meant to
> schedule work on a "random" CPU of the requested NUMA node. The main
> motivation for this is to help assist asynchronous init to better improve
> boot times for devices that are local to a specific node.
>
> For now we just default to the first CPU that is in the intersection of the
> cpumask of the node and the online cpumask. The only exception is if the
> CPU is local to the node we will just use the current CPU. This should work
> for our purposes as we are currently only using this for unbound work so
> the CPU will be translated to a node anyway instead of being directly used.
>
> As we are only using the first CPU to represent the NUMA node for now I am
> limiting the scope of the function so that it can only be used with unbound
> workqueues.
>
> Signed-off-by: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Acked-by: Tejun Heo <tj@kernel.org>
Please let me know how you wanna route the patch.
Thanks.
--
tejun
next prev parent reply other threads:[~2018-10-11 15:04 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-10 23:07 [workqueue/driver-core PATCH v2 0/5] Add NUMA aware async_schedule calls Alexander Duyck
2018-10-10 23:07 ` [workqueue/driver-core PATCH v2 1/5] workqueue: Provide queue_work_node to queue work near a given NUMA node Alexander Duyck
2018-10-11 15:04 ` Tejun Heo [this message]
2018-10-11 16:49 ` Alexander Duyck
2018-10-11 17:02 ` Greg KH
2018-10-11 17:13 ` Alexander Duyck
2018-10-10 23:08 ` [workqueue/driver-core PATCH v2 2/5] async: Add support for queueing on specific " Alexander Duyck
2018-10-11 10:47 ` Greg KH
2018-10-11 15:51 ` Alexander Duyck
2018-10-10 23:08 ` [workqueue/driver-core PATCH v2 3/5] driver core: Probe devices asynchronously instead of the driver Alexander Duyck
2018-10-10 23:08 ` [workqueue/driver-core PATCH v2 4/5] driver core: Attach devices on CPU local to device node Alexander Duyck
2018-10-11 10:45 ` Greg KH
2018-10-11 15:50 ` Alexander Duyck
2018-10-10 23:08 ` [workqueue/driver-core PATCH v2 5/5] PM core: Use new async_schedule_dev command Alexander Duyck
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