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=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 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 1F212C3A59D for ; Thu, 22 Aug 2019 08:10:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B496E20870 for ; Thu, 22 Aug 2019 08:10:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732085AbfHVIK5 (ORCPT ); Thu, 22 Aug 2019 04:10:57 -0400 Received: from verein.lst.de ([213.95.11.211]:44780 "EHLO verein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728519AbfHVIK5 (ORCPT ); Thu, 22 Aug 2019 04:10:57 -0400 Received: by verein.lst.de (Postfix, from userid 2407) id E4EE768C4E; Thu, 22 Aug 2019 10:10:54 +0200 (CEST) Date: Thu, 22 Aug 2019 10:10:54 +0200 From: Christoph Hellwig To: Atish Patra Cc: linux-kernel@vger.kernel.org, Albert Ou , linux-riscv@lists.infradead.org, Palmer Dabbelt , Paul Walmsley , Christoph Hellwig , Anup Patel Subject: Re: [PATCH v4 2/3] RISC-V: Issue a local tlbflush if possible. Message-ID: <20190822081054.GB17573@lst.de> References: <20190822075151.24838-1-atish.patra@wdc.com> <20190822075151.24838-3-atish.patra@wdc.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190822075151.24838-3-atish.patra@wdc.com> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Aug 22, 2019 at 12:51:50AM -0700, Atish Patra wrote: > In RISC-V, tlb flush happens via SBI which is expensive. If the local > cpu is the only cpu in cpumask, there is no need to invoke a SBI call. > > Just do a local flush and return. > > Signed-off-by: Atish Patra Looks good, Reviewed-by: Christoph Hellwig 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=-5.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 B2947C3A59D for ; Thu, 22 Aug 2019 08:11:01 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 84BBB20870 for ; Thu, 22 Aug 2019 08:11:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="hDgCDCqm" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 84BBB20870 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ibM/0jW3cCG7fvq7VR3s+XN7BHJ8qopL6BEZZ0hObY0=; b=hDgCDCqma56wzl WxMSt00kTQFQcDOlqvgRgaSIaxpYJXaP9HAOsTQfaBJDGDVLJ4RGdKccUcZQWfYGucrWkqBL1onen uVN9HF2LJiIgSFvWyf8WnBrET9ba19KkUKH60aJp9AM8g2d8vdv5eOha8ud+5BckgP7MwFyJR0/PD PpNi6/VO+tCksLv3gfCVde6lsudjIEpZPlwN4CbFP828rM7hN3Hy3eydDWmLDl1IuHUZtdyawK7Ui 3H7oCNQRhL8lhBgXv4Bh4PLNeu/x5Pd6antn+klUrbgGEw8lwqeSTyCJKsdlFD+lSLURFFkh1kCTf RaOd+qCMEx5dQwOCeqUA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1i0iBQ-00057N-P4; Thu, 22 Aug 2019 08:11:00 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1i0iBN-00056N-LI for linux-riscv@lists.infradead.org; Thu, 22 Aug 2019 08:10:58 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id E4EE768C4E; Thu, 22 Aug 2019 10:10:54 +0200 (CEST) Date: Thu, 22 Aug 2019 10:10:54 +0200 From: Christoph Hellwig To: Atish Patra Subject: Re: [PATCH v4 2/3] RISC-V: Issue a local tlbflush if possible. Message-ID: <20190822081054.GB17573@lst.de> References: <20190822075151.24838-1-atish.patra@wdc.com> <20190822075151.24838-3-atish.patra@wdc.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190822075151.24838-3-atish.patra@wdc.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190822_011057_847858_1F4EF587 X-CRM114-Status: UNSURE ( 7.65 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Albert Ou , Palmer Dabbelt , linux-kernel@vger.kernel.org, Anup Patel , Paul Walmsley , linux-riscv@lists.infradead.org, Christoph Hellwig Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org On Thu, Aug 22, 2019 at 12:51:50AM -0700, Atish Patra wrote: > In RISC-V, tlb flush happens via SBI which is expensive. If the local > cpu is the only cpu in cpumask, there is no need to invoke a SBI call. > > Just do a local flush and return. > > Signed-off-by: Atish Patra Looks good, Reviewed-by: Christoph Hellwig _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv