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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 62FB2C433F5 for ; Tue, 22 Mar 2022 15:21:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238447AbiCVPXI (ORCPT ); Tue, 22 Mar 2022 11:23:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47844 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234092AbiCVPXF (ORCPT ); Tue, 22 Mar 2022 11:23:05 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id D9A4E4CD49 for ; Tue, 22 Mar 2022 08:21:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1647962497; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=pXHPWXKwW6dA2VH85GvT6aXK+VO1evC+jnd2BN9ct3E=; b=ObKVt4C+Oyxcw51cSiCY4eSt4qB1/x0KuIu8yY5kMT1h0dMQfkwQR+DL14D1SCbf62hbNx pTPUvsz2zHLEaXnXKOnNl8pnEU/P61B1fgFWJs7eQtpkC9YaEizJZbdp3g8nSmKc3WUI8a HJr0Oa7CdsVW2TF/gqXtxL9Ts4DlDoA= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-111-st6ri318Pt2CkPyZOi6bag-1; Tue, 22 Mar 2022 11:21:35 -0400 X-MC-Unique: st6ri318Pt2CkPyZOi6bag-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 7EE8585A5BE; Tue, 22 Mar 2022 15:21:34 +0000 (UTC) Received: from llong.com (dhcp-17-215.bos.redhat.com [10.18.17.215]) by smtp.corp.redhat.com (Postfix) with ESMTP id 49A3B40D2822; Tue, 22 Mar 2022 15:21:34 +0000 (UTC) From: Waiman Long To: Peter Zijlstra , Ingo Molnar , Will Deacon , Boqun Feng Cc: linux-kernel@vger.kernel.org, Waiman Long Subject: [PATCH v2 0/3] locking/rwsem: Miscellaneous cleanup and fix Date: Tue, 22 Mar 2022 11:20:56 -0400 Message-Id: <20220322152059.2182333-1-longman@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.84 on 10.11.54.2 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Patch 1 is just a simple cleanup patch. Patches 2 and 3 applies the same consistent rules to optionally wake up waiters in reader & writers slowpaths as well as in the out_nolock paths. Waiman Long (3): locking/rwsem: No need to check for handoff bit if wait queue empty locking/rwsem: Conditionally wake waiters in reader/writer slowpaths locking/rwsem: Always try to wake waiters in out_nolock path kernel/locking/rwsem.c | 121 ++++++++++++++++++++++++----------------- 1 file changed, 70 insertions(+), 51 deletions(-) -- 2.27.0