From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1D65EC28CF8 for ; Thu, 11 Oct 2018 22:10:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DA18120841 for ; Thu, 11 Oct 2018 22:10:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DA18120841 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727061AbeJLFkH (ORCPT ); Fri, 12 Oct 2018 01:40:07 -0400 Received: from mga12.intel.com ([192.55.52.136]:34957 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725830AbeJLFkG (ORCPT ); Fri, 12 Oct 2018 01:40:06 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 11 Oct 2018 15:10:51 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,370,1534834800"; d="scan'208";a="80764031" Received: from ahduyck-mobl.amr.corp.intel.com (HELO localhost.localdomain) ([10.7.198.157]) by orsmga008.jf.intel.com with ESMTP; 11 Oct 2018 15:09:38 -0700 Subject: [driver-core PATCH v3 4/5] driver core: Attach devices on CPU local to device node From: Alexander Duyck To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org Cc: len.brown@intel.com, rafael@kernel.org, linux-pm@vger.kernel.org, jiangshanlai@gmail.com, pavel@ucw.cz, zwisler@kernel.org, tj@kernel.org, akpm@linux-foundation.org, alexander.h.duyck@linux.intel.com Date: Thu, 11 Oct 2018 15:09:38 -0700 Message-ID: <20181011220938.1408.87333.stgit@localhost.localdomain> In-Reply-To: <20181011220134.1408.63391.stgit@localhost.localdomain> References: <20181011220134.1408.63391.stgit@localhost.localdomain> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This change makes it so that we call the asynchronous probe routines on a CPU local to the device node. By doing this we should be able to improve our initialization time significantly as we can avoid having to access the device from a remote node which may introduce higher latency. For example, in the case of initializing memory for NVDIMM this can have a singifcant impact as initialing 3TB on remote node can take up to 39 seconds while initialing it on a local node only takes 23 seconds. It is situations like this where we will see the biggest improvement. Signed-off-by: Alexander Duyck --- drivers/base/dd.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/base/dd.c b/drivers/base/dd.c index 5ba366c1cb83..81472dc44a70 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -826,7 +826,7 @@ static int __device_attach(struct device *dev, bool allow_async) */ dev_dbg(dev, "scheduling asynchronous probe\n"); get_device(dev); - async_schedule(__device_attach_async_helper, dev); + async_schedule_dev(__device_attach_async_helper, dev); } else { pm_request_idle(dev); } @@ -927,7 +927,7 @@ static int __driver_attach(struct device *dev, void *data) if (!dev->driver) { get_device(dev); dev_set_drvdata(dev, drv); - async_schedule(__driver_attach_async_helper, dev); + async_schedule_dev(__driver_attach_async_helper, dev); } device_unlock(dev); return 0;