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=-14.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 C16D7C433E0 for ; Mon, 15 Mar 2021 19:20:42 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 67FA764F43 for ; Mon, 15 Mar 2021 19:20:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 67FA764F43 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lwn.net Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:References:In-Reply-To: Subject:Cc:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=HlNAEImSdpKC+R2lVPavKVpaSW6l1QoaasZjmxHmFeE=; b=c5Z0oqFHlMf0B7QbX2nMIyTR5 u5mfNY4ojU+4z+eza+na6beSIp2WJmRJS46nfy2ieGn2dBQAt3Il/yCxzC0PvrY0U8f8dqHkrHPfY 4qQqz9p9frj3QtBaTOjwulFC97eXN87jNzJSGZcquFKe6JSuNU7UPsL0F/IxAtEpCwpGbenKxCzm4 cAKgVPe2yFUmb8VFcBwcrYapmSiHbox+o+UPBcZYSoXQlQ8P+/whqbUpWZgYb5kUrmGAw26q7w+aq xe3fjkLaayUvR2FRFroWVBM/6ulTxqtIj0skcBlyxQhPmlj7oNfxQXCCyrhFdyOXKH9Juq1n0Nl6L nQqwd1mpg==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lLsk6-00GkwT-KN; Mon, 15 Mar 2021 19:19:06 +0000 Received: from ms.lwn.net ([45.79.88.28]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lLsk0-00GkvX-4d for linux-arm-kernel@lists.infradead.org; Mon, 15 Mar 2021 19:19:02 +0000 Received: from localhost (unknown [IPv6:2601:281:8300:104d::5f6]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ms.lwn.net (Postfix) with ESMTPSA id 19DF82E5; Mon, 15 Mar 2021 19:18:58 +0000 (UTC) DKIM-Filter: OpenDKIM Filter v2.11.0 ms.lwn.net 19DF82E5 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lwn.net; s=20201203; t=1615835938; bh=So9BxVVP4vJIybXhEmOBJxB5pieD4QyUvx0pbVCgp5I=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=mpxpQzoi39ZdBSexYO8A147/EiFJIj5SoXm+LXMnBxovMbOWbVB6aIxT2VQb1cNbO ip0xp770AKFuhIydaupQQHAkN8Xbcee6TyuidcwI9EJ47QxOhzeivCCr1bhdZBVMHJ H5ickUEj4++Vbq5B9J8JdydI7qyiosgyR9Q13mYmXrqp8bzgfWd/HwHFi3VBLfSrrI 37ieCOZ8AZ4b8wrxy1K+R4Pc3/Oh3yM9h8cKil32skwu5HcZBL/NTqu9KXLyoq2ejs cYu8/BkAW54GB8VAn/FKB56k2dmvGITUJy90NbeEmHgVdHG2wbN3oPPpkJa+PXGunt HYSc6IK0mVqlg== From: Jonathan Corbet To: Barry Song , linux-doc@vger.kernel.org, akpm@linux-foundation.org, linux-mm@kvack.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linuxarm@openeuler.org, Barry Song , Mel Gorman , Andy Lutomirski , Catalin Marinas , Will Deacon Subject: Re: [PATCH] Documentation/features: mark BATCHED_UNMAP_TLB_FLUSH doesn't apply to ARM64 In-Reply-To: <20210223003230.11976-1-song.bao.hua@hisilicon.com> References: <20210223003230.11976-1-song.bao.hua@hisilicon.com> Date: Mon, 15 Mar 2021 13:18:57 -0600 Message-ID: <87a6r42pjy.fsf@meer.lwn.net> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210315_191900_737301_9ADFD4C7 X-CRM114-Status: GOOD ( 16.01 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Barry Song writes: > BATCHED_UNMAP_TLB_FLUSH is used on x86 to do batched tlb shootdown by > sending one IPI to TLB flush all entries after unmapping pages rather > than sending an IPI to flush each individual entry. > On arm64, tlb shootdown is done by hardware. Flush instructions are > innershareable. The local flushes are limited to the boot (1 per CPU) > and when a task is getting a new ASID. > So marking this feature as "TODO" is not proper. ".." isn't good as > well. So this patch adds a "N/A" for this kind of features which are > not needed on some architectures. > > Cc: Mel Gorman > Cc: Andy Lutomirski > Cc: Catalin Marinas > Cc: Will Deacon > Signed-off-by: Barry Song > --- > Documentation/features/arch-support.txt | 1 + > Documentation/features/vm/TLB/arch-support.txt | 2 +- > 2 files changed, 2 insertions(+), 1 deletion(-) This had a conflict with the c6x removal, but I fixed that up and (finally) applied it, thanks. jon _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel