Received: by 2002:a05:6a10:206:0:0:0:0 with SMTP id 6csp58245pxj; Wed, 16 Jun 2021 20:13:36 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyY6xdwRolcAAnAfiSK74Dtqffb8648fe6rdfBtOnLarTt/FGmMQWYUmvSJgwCniih4unrK X-Received: by 2002:a17:906:eb88:: with SMTP id mh8mr2727147ejb.540.1623899616358; Wed, 16 Jun 2021 20:13:36 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1623899616; cv=none; d=google.com; s=arc-20160816; b=gF0v8tMzHUHssX/fRDPtY3ioRb3tS7qL9/rYQAnUeHNI6CrctA+miAySHx4Bv8sqYX y1h05PXoCzKh6ovBbYG52HmT8Gh2QUJcO8abnuuTrGqrDQBw0xCfZT21oGCCNmIchTnz Xr/UW3jy/StmCWcXPSswQUtcOx0gAy25e/+Op0D7iOb3cI8cm2lkO16eTwBXv7iqpHYf ApX2k4R8+h1RpR6jR2JqGaSIhGyeGNjZsSwRjL1oKd/U80yWWGxeseqcYpd3F6eZ8quw zWaqtSt7FVUqzUTDIw5mFvT6u6jHFeMjPELyUrRunSJEBmjPXqxg1U3DWM/J4FWYwVTx JKUw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:content-language :in-reply-to:mime-version:user-agent:date:message-id:from:references :cc:to:subject:dkim-signature; bh=K/zv0RYYHjMIXPCNC8kFGwHg1xvoxIhY4ZE4W5uBEQc=; b=m8J4KNFd96nlm4vwAqOIOh5UuUkGGQGkwXBwuYXvSaIPJXukPJZMHiHhkpOWWy+jY7 Me44ujtjYdMxNFh18ZTAHRvSyn8giZDTWP//DF+lBKiXeuddj/6/YL+kxqlLtEb/pd+D Y1BdyRMNIxQqX+yfURx8udwwcClRVkobRhviHUJWi62ZeK3rziPQYRV+ssSVUsKw6I3N e629+qLtLbP8S0WXXGc3tbcon9ivFyyYaiaypXkH85zc7vNnMXDqEKQ/HIfFfSC4FXKH 8ffRWvpKA2iEpyD26DwjFVo7r9i+bh0DnfJ8DjJcCIRccFQVihk7KJTQC20HgdFfl3Ko jBnw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b="DFrmhp/y"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id r15si4237935edo.442.2021.06.16.20.13.13; Wed, 16 Jun 2021 20:13:36 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b="DFrmhp/y"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231874AbhFPSdk (ORCPT + 99 others); Wed, 16 Jun 2021 14:33:40 -0400 Received: from mail.kernel.org ([198.145.29.99]:39978 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231858AbhFPSdj (ORCPT ); Wed, 16 Jun 2021 14:33:39 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 3470660233; Wed, 16 Jun 2021 18:31:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1623868293; bh=K/zv0RYYHjMIXPCNC8kFGwHg1xvoxIhY4ZE4W5uBEQc=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=DFrmhp/yHde/NgfCrqZ86WuY8OOvlqVg2JX46GqI1Sbnaiyg8TdK7LrYn3NI9/RYV 4+z1NVCifahnIynH2tQmUZIndcW0roEDHkb5qEQElcu2KLPYet1b6tB8dZr+DzAqcw yhXxvgUDArA9hMFHBrVAyLbxJqMJzoRVjPKK5ZFr0JPmIf6QlJfVLK96PF303Hnhan Fc/TZdmG6OkDAxBdnrA55ZNbqcvhx7vsmMLtusEfOOoqOzl2FrHT4mm1x/rPAHr8JD nJTNtGBM/wrNBCxoEhbTko7GIgY2QPCfNelQS3/pZvVnf0DktTzhjUrQVRlf+HASr3 Ot09X4X6UTumQ== Subject: Re: [PATCH 2/8] x86/mm: Handle unlazying membarrier core sync in the arch code To: Nicholas Piggin , x86@kernel.org Cc: Andrew Morton , Dave Hansen , LKML , linux-mm@kvack.org, Mathieu Desnoyers , Peter Zijlstra References: <571b7e6b6a907e8a1ffc541c3f0005d347406fd0.1623813516.git.luto@kernel.org> <1623817261.p1mg6dm2ud.astroid@bobo.none> From: Andy Lutomirski Message-ID: <097dee91-dae5-f58d-d0c8-87522079a658@kernel.org> Date: Wed, 16 Jun 2021 11:31:32 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <1623817261.p1mg6dm2ud.astroid@bobo.none> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 6/15/21 9:25 PM, Nicholas Piggin wrote: > Excerpts from Andy Lutomirski's message of June 16, 2021 1:21 pm: > I'm fine with the patch though, except I would leave the comment in the > core sched code saying any arch specific sequence to deal with > SYNC_CORE is required for that case. Done.