From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1751590AbeA2EN7 (ORCPT <rfc822;w@1wt.eu>);
        Sun, 28 Jan 2018 23:13:59 -0500
Received: from ozlabs.org ([103.22.144.67]:51625 "EHLO ozlabs.org"
        rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
        id S1751508AbeA2ENw (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
        Sun, 28 Jan 2018 23:13:52 -0500
X-powerpc-patch-notification: thanks
X-powerpc-patch-commit: 5c8136fa1af7c0e9b4aec89cf2832f6e5197ce32
In-Reply-To: <20180123132250.4A2BD6EF69@localhost.localdomain>
To: Christophe Leroy <christophe.leroy@c-s.fr>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>, Scott Wood <oss@buserror.net>
From: Michael Ellerman <patch-notifications@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: powerpc/mm/nohash: do not flush the entire mm when range is a single page
Message-Id: <3zVGNG3nlpz9sPk@ozlabs.org>
Date: Mon, 29 Jan 2018 15:13:50 +1100 (AEDT)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Tue, 2018-01-23 at 13:22:50 UTC, Christophe Leroy wrote:
> Most of the time, flush_tlb_range() is called on single pages.
> At the time being, flush_tlb_range() inconditionnaly calls
> flush_tlb_mm() which flushes at least the entire PID pages and on
> older CPUs like 4xx or 8xx it flushes the entire TLB table.
> 
> This patch calls flush_tlb_page() instead of flush_tlb_mm() when
> the range is a single page.
> 
> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/5c8136fa1af7c0e9b4aec89cf2832f

cheers