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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 3D8EFCA0ECA for ; Fri, 30 Aug 2024 00:50:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To: Content-Transfer-Encoding:Content-Type:MIME-Version:References:Message-ID: Subject:Cc: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=8y2Kll8nT4BLVzBidS9pKQWgrXMIL/ggfNq4v3iS4Ns=; b=Z6RNUyodSafRbbx9WwgCyiBTLG mwvLdjGVUQ2yCy0citMMlJgVGjaI1M8APHGwMwdTeDbR781o0KrWANK/HJmuy6YLgvIrjmbTzAfbw pVU6JIAyDr3buGaYU6ZlQhH3ElbJuIIfGeE+NQuEtJpMHFyWuA3RzMFWiOvKnsYoiy9p4uFaO3kXQ 7b9GYiNCEgX8ZWk6mY4X8C3mwhcKukFOGuoDgx1HgFRGKeSs2bDTJ3DHnuwZ27vbwFF1Wtg3hPKzM VI/RRlaXDn1WsUf3kAThcf7I5MqK9rJ/Z/kNhsZuRWxg2cosmuKgDEF4jY4qSyG33OOGDnElHwwso RPCws40Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sjppj-00000004DdV-2pSX; Fri, 30 Aug 2024 00:49:47 +0000 Received: from out-187.mta0.migadu.com ([91.218.175.187]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sjpor-00000004DSB-0XK0 for linux-arm-kernel@lists.infradead.org; Fri, 30 Aug 2024 00:48:55 +0000 Date: Thu, 29 Aug 2024 17:48:36 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1724978927; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=8y2Kll8nT4BLVzBidS9pKQWgrXMIL/ggfNq4v3iS4Ns=; b=etGcMieZiC3utjViFAlpI9Q6jTA2GrUhjR3APrcFmjnyykescLwEzzLIR567rkcuifxprw 492V+ebcrM2d4UHpenLZhBbJ/dJVOb5hUVdap+Mqd3d+QYeJ/tL9FfAttCtER+CVTJnnCs yWusU8FlhB1MN5HoGZPcNZMz3fz9HqM= X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Oliver Upton To: James Houghton Cc: Yu Zhao , Sean Christopherson , Andrew Morton , Paolo Bonzini , Ankit Agrawal , Axel Rasmussen , Catalin Marinas , David Matlack , David Rientjes , James Morse , Jason Gunthorpe , Jonathan Corbet , Marc Zyngier , Raghavendra Rao Ananta , Ryan Roberts , Shaoqin Huang , Suzuki K Poulose , Wei Xu , Will Deacon , Zenghui Yu , kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH v6 03/11] KVM: arm64: Relax locking for kvm_test_age_gfn and kvm_age_gfn Message-ID: References: <20240724011037.3671523-1-jthoughton@google.com> <20240724011037.3671523-4-jthoughton@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Migadu-Flow: FLOW_OUT X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240829_174853_508433_5C077E8E X-CRM114-Status: GOOD ( 16.85 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Aug 29, 2024 at 05:33:00PM -0700, James Houghton wrote: > On Mon, Aug 19, 2024 at 1:42 PM Oliver Upton wrote: > > Asking since you had a setup / data earlier on when you were carrying > > the series. Hopefully with supportive data we can get arm64 to opt-in > > to HAVE_KVM_MMU_NOTIFIER_YOUNG_FAST_ONLY as well. > > I'll keep trying some other approaches I can take for getting similar > testing that Yu had; it is somewhat difficult for me to reproduce > those tests (and it really shouldn't be.... sorry). No need to apologize. Getting good test hardware for arm64 is a complete chore. Sure would love a functional workstation with cores from this decade... > I think it makes most sense for me to drop the arm64 patch for now and > re-propose it (or something stronger) alongside enabling aging. Does > that sound ok? I'm a bit disappointed that we haven't gotten forward progress on the arm64 patches, but I also recognize this is the direction of travel as the x86 patches are shaping up. So yeah, I'm OK with it, but I'd love to get the arm64 side sorted out soon while the context is still fresh. -- Thanks, Oliver