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=-2.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=no 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 A3F97CA9ECB for ; Thu, 31 Oct 2019 13:09:56 +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 75A872087E for ; Thu, 31 Oct 2019 13:09:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="YrRJH8i3"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="Hy/fk/lW" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 75A872087E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-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=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=Pmf5IbAgfPElAzAJ5mOwJ6YUyQx5Uurn87IHhpGWlh4=; b=YrRJH8i346z/YD azAZ61fhP+2nIalSkBaCokyNIq7tEd8SpzTtemHuEE2DuIoHrKOP0ZN7+Q+obo3y/Ep1HzFazNhzn rns6hxDsoujKgihhD74an/RH8nXnivMg4waij6XotwmbAJn6TIwUMrkfMCQefNRPsh8rPQPjwC6CM aKYeiKwxWynScR9ASU7h0qHQozutJbAEyOehpq7raCeCa+nuVqkjstwPKT0xmZa3vtNABTYJTXn15 XgCzf9ORXBZUvZHAZVoVrebf8FCTEM0J2PMXTsyfR+6wqSkI3EyQIsxVAjqkohjE7x8/eUn+4lG/Y fwsQpkgTesFRXL95Hm6w==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iQAD5-0006nZ-OB; Thu, 31 Oct 2019 13:09:55 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iQAD2-0006mg-Su for linux-arm-kernel@lists.infradead.org; Thu, 31 Oct 2019 13:09:54 +0000 Received: from willie-the-truck (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 99BEE2080F; Thu, 31 Oct 2019 13:09:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572527392; bh=h4ufg1xgwNnLLqvUR9beo19dIUW2RxlYQwzo0mxMQsk=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Hy/fk/lWziR2ZXtVj9ogRGxKxDKwDjQXstqsE+Df4Lceil0PADEsV+hmhkoHENGJR OI1GcfKOhrlgi1cbgGGltbi9wftCcilllz0fNuJxThz4TM8GLrOvXqgSOMW1tVbhL/ E0ojuucWLbpRnDEgPK2GpbMrg6lGKgHBjR7MR+O8= Date: Thu, 31 Oct 2019 13:09:48 +0000 From: Will Deacon To: Mark Brown Subject: Re: [PATCH v4 0/4] E0PD support Message-ID: <20191031130948.GA27196@willie-the-truck> References: <20191024214207.20588-1-broonie@kernel.org> <20191031112610.GA26059@willie-the-truck> <0152ac71-1295-a302-7810-f9767f7bbd78@huawei.com> <20191031124217.GE26059@willie-the-truck> <20191031130018.GQ4568@sirena.org.uk> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20191031130018.GQ4568@sirena.org.uk> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191031_060952_955973_1FE5B204 X-CRM114-Status: GOOD ( 13.83 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Catalin Marinas , John Garry , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Oct 31, 2019 at 02:00:18PM +0100, Mark Brown wrote: > On Thu, Oct 31, 2019 at 12:42:18PM +0000, Will Deacon wrote: > > On Thu, Oct 31, 2019 at 12:13:35PM +0000, John Garry wrote: > > > > I booted our D05 and D06 boards with that branch and did not experience the > > > pauses which we reported some time ago. > > > Hmm. So I annotated the code locally and I see that we do rewrite swapper > > in this case, so I'm surprised you're not seeing the performance issue > > you ran into with this before. Have you got KASLR enabled and are you > > passing a non-zero seed? > > Gah, sorry - I tested change which sets arm64_use_ng_mappings > early, should be sitting on my machine at home, in mm/init.c. > That will mean that there's only a slowdown in cases where we > have a mix of E0PD and non-E0PD CPUs with the boot CPU having > E0PD, hopefully no such systems have very large amounts of > memory. > > I'll post it Monday at the latest. Thanks, Mark. Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel