{"id":814589,"url":"http://patchwork.ozlabs.org/api/patches/814589/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/1505621128-23877-7-git-send-email-sukadev@linux.vnet.ibm.com/","project":{"id":2,"url":"http://patchwork.ozlabs.org/api/projects/2/?format=json","name":"Linux PPC development","link_name":"linuxppc-dev","list_id":"linuxppc-dev.lists.ozlabs.org","list_email":"linuxppc-dev@lists.ozlabs.org","web_url":"https://github.com/linuxppc/wiki/wiki","scm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git","webscm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/","list_archive_url":"https://lore.kernel.org/linuxppc-dev/","list_archive_url_format":"https://lore.kernel.org/linuxppc-dev/{}/","commit_url_format":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}"},"msgid":"<1505621128-23877-7-git-send-email-sukadev@linux.vnet.ibm.com>","list_archive_url":"https://lore.kernel.org/linuxppc-dev/1505621128-23877-7-git-send-email-sukadev@linux.vnet.ibm.com/","date":"2017-09-17T04:05:24","name":"[06/10] powerpc/vas: Reduce polling interval for busy state","commit_ref":null,"pull_url":null,"state":"superseded","archived":true,"hash":"1105650c4509c80cd0261f4c78fec48c9258a07b","submitter":{"id":984,"url":"http://patchwork.ozlabs.org/api/people/984/?format=json","name":"Sukadev Bhattiprolu","email":"sukadev@linux.vnet.ibm.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/1505621128-23877-7-git-send-email-sukadev@linux.vnet.ibm.com/mbox/","series":[{"id":3482,"url":"http://patchwork.ozlabs.org/api/series/3482/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=3482","date":"2017-09-17T04:05:19","name":"powerpc/vas: cleanup and optimizations","version":1,"mbox":"http://patchwork.ozlabs.org/series/3482/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/814589/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/814589/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":["patchwork-incoming@ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Delivered-To":["patchwork-incoming@ozlabs.org","linuxppc-dev@lists.ozlabs.org","linuxppc-dev@ozlabs.org"],"Received":["from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\t(using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3xvwlz1M4Rz9s7h\n\tfor ;\n\tSun, 17 Sep 2017 14:15:27 +1000 (AEST)","from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\tby lists.ozlabs.org (Postfix) with ESMTP id 3xvwlz0VhlzDscD\n\tfor ;\n\tSun, 17 Sep 2017 14:15:27 +1000 (AEST)","from ozlabs.org (bilbo.ozlabs.org [103.22.144.67])\n\t(using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby lists.ozlabs.org (Postfix) with ESMTPS id 3xvwXt1wQ2zDrpH\n\tfor ;\n\tSun, 17 Sep 2017 14:05:50 +1000 (AEST)","from ozlabs.org (ozlabs.org [IPv6:2401:3900:2:1::2])\n\tby bilbo.ozlabs.org (Postfix) with ESMTP id 3xvwXs6bnzz8t3H\n\tfor ;\n\tSun, 17 Sep 2017 14:05:49 +1000 (AEST)","by ozlabs.org (Postfix)\n\tid 3xvwXs5lSRz9t2f; Sun, 17 Sep 2017 14:05:49 +1000 (AEST)","from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com\n\t[148.163.156.1])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256\n\tbits)) (No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3xvwXs2bjkz9t2V\n\tfor ; Sun, 17 Sep 2017 14:05:49 +1000 (AEST)","from pps.filterd (m0098410.ppops.net [127.0.0.1])\n\tby mx0a-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id\n\tv8H44PWU049183\n\tfor ; Sun, 17 Sep 2017 00:05:47 -0400","from e33.co.us.ibm.com (e33.co.us.ibm.com [32.97.110.151])\n\tby mx0a-001b2d01.pphosted.com with ESMTP id 2d10ggga5j-1\n\t(version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT)\n\tfor ; Sun, 17 Sep 2017 00:05:47 -0400","from localhost\n\tby e33.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use\n\tOnly! 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Violators will be prosecuted; \n\tSat, 16 Sep 2017 22:05:44 -0600","from b03ledav005.gho.boulder.ibm.com\n\t(b03ledav005.gho.boulder.ibm.com [9.17.130.236])\n\tby b03cxnp07028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with\n\tESMTP id v8H45hsQ4129166; Sat, 16 Sep 2017 21:05:43 -0700","from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1])\n\tby IMSVA (Postfix) with ESMTP id A9E5DBE044;\n\tSat, 16 Sep 2017 22:05:43 -0600 (MDT)","from suka-w540.usor.ibm.com (unknown [9.70.94.25])\n\tby b03ledav005.gho.boulder.ibm.com (Postfix) with ESMTP id 3C167BE03E;\n\tSat, 16 Sep 2017 22:05:43 -0600 (MDT)"],"Authentication-Results":"ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=linux.vnet.ibm.com\n\t(client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com;\n\tenvelope-from=sukadev@linux.vnet.ibm.com; receiver=)","From":"Sukadev Bhattiprolu ","To":"Michael Ellerman ","Subject":"[PATCH 06/10] powerpc/vas: Reduce polling interval for busy state","Date":"Sat, 16 Sep 2017 21:05:24 -0700","X-Mailer":"git-send-email 2.7.4","In-Reply-To":"<1505621128-23877-1-git-send-email-sukadev@linux.vnet.ibm.com>","References":"<1505621128-23877-1-git-send-email-sukadev@linux.vnet.ibm.com>","X-TM-AS-GCONF":"00","x-cbid":"17091704-0008-0000-0000-000008951204","X-IBM-SpamModules-Scores":"","X-IBM-SpamModules-Versions":"BY=3.00007754; HX=3.00000241; KW=3.00000007;\n\tPH=3.00000004; SC=3.00000229; SDB=6.00918138; UDB=6.00461174;\n\tIPR=6.00698363; \n\tBA=6.00005592; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009;\n\tZB=6.00000000; \n\tZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00017185;\n\tXFM=3.00000015; UTC=2017-09-17 04:05:46","X-IBM-AV-DETECTION":"SAVI=unused REMOTE=unused XFE=unused","x-cbparentid":"17091704-0009-0000-0000-00004400E397","Message-Id":"<1505621128-23877-7-git-send-email-sukadev@linux.vnet.ibm.com>","X-Proofpoint-Virus-Version":"vendor=fsecure engine=2.50.10432:, ,\n\tdefinitions=2017-09-17_03:, , signatures=0","X-Proofpoint-Spam-Details":"rule=outbound_notspam policy=outbound score=0\n\tspamscore=0 suspectscore=0\n\tmalwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam\n\tadjust=0 reason=mlx scancount=1 engine=8.0.1-1707230000\n\tdefinitions=main-1709170058","X-BeenThere":"linuxppc-dev@lists.ozlabs.org","X-Mailman-Version":"2.1.24","Precedence":"list","List-Id":"Linux on PowerPC Developers Mail List\n\t","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Cc":"linuxppc-dev@ozlabs.org, mikey@neuling.org, linux-kernel@vger.kernel.org","Errors-To":"linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org","Sender":"\"Linuxppc-dev\"\n\t"},"content":"A VAS window is normally in \"busy\" state for only a short duration.\nReduce the time we wait for the window to go to \"not-busy\" state to\nspeed-up vas_win_close() a bit.\n\nSigned-off-by: Sukadev Bhattiprolu \n---\n arch/powerpc/platforms/powernv/vas-window.c | 10 ++++++----\n 1 file changed, 6 insertions(+), 4 deletions(-)","diff":"diff --git a/arch/powerpc/platforms/powernv/vas-window.c b/arch/powerpc/platforms/powernv/vas-window.c\nindex 95622a9..1422cdd 100644\n--- a/arch/powerpc/platforms/powernv/vas-window.c\n+++ b/arch/powerpc/platforms/powernv/vas-window.c\n@@ -1060,21 +1060,23 @@ int vas_paste_crb(struct vas_window *txwin, int offset, bool re)\n }\n EXPORT_SYMBOL_GPL(vas_paste_crb);\n \n+/*\n+ * Wait for the window to go to \"not-busy\" state. It should only take a\n+ * short time to queue a CRB, so window should not be busy for too long.\n+ * Trying 5ms intervals.\n+ */\n static void poll_window_busy_state(struct vas_window *window)\n {\n \tint busy;\n \tu64 val;\n \n retry:\n-\t/*\n-\t * Poll Window Busy flag\n-\t */\n \tval = read_hvwc_reg(window, VREG(WIN_STATUS));\n \tbusy = GET_FIELD(VAS_WIN_BUSY, val);\n \tif (busy) {\n \t\tval = 0;\n \t\tset_current_state(TASK_UNINTERRUPTIBLE);\n-\t\tschedule_timeout(HZ);\n+\t\tschedule_timeout(msecs_to_jiffies(5));\n \t\tgoto retry;\n \t}\n }\n","prefixes":["06/10"]}