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[83.42.61.62]) by smtp.gmail.com with ESMTPSA id g19sm34905185wrb.52.2019.07.16.00.02.20 (version=TLS1_3 cipher=AEAD-AES128-GCM-SHA256 bits=128/128); Tue, 16 Jul 2019 00:02:20 -0700 (PDT) To: Joel Stanley , Peter Maydell References: <20190704055150.4899-1-clg@kaod.org> <20190704101345.GC1609@stefanha-x1.localdomain> From: =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= Openpgp: id=89C1E78F601EE86C867495CBA2A3FD6EDEADC0DE; url=http://pgp.mit.edu/pks/lookup?op=get&search=0xA2A3FD6EDEADC0DE Message-ID: Date: Tue, 16 Jul 2019 09:02:19 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.85.221.67 Subject: Re: [Qemu-devel] [PATCH for 4.1] aspeed/timer: Provide back-pressure information for short periods X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrew Jeffery , QEMU Developers , qemu-arm , =?UTF-8?Q?C=c3=a9dric_Le_Goater?= , Stefan Hajnoczi , Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 7/16/19 9:00 AM, Joel Stanley wrote: > On Tue, 16 Jul 2019 at 06:54, Joel Stanley wrote: >> >> Hi Peter, >> >> On Thu, 4 Jul 2019 at 12:26, Paolo Bonzini wrote: >>> >>> On 04/07/19 12:13, Stefan Hajnoczi wrote: >>>> On Thu, Jul 04, 2019 at 11:26:53AM +0200, Philippe Mathieu-Daudé wrote: >>>>> CC'ing Stefan & Paolo for a non-ARM view on this... >>>> >>>> I'm not familiar with the various clock smoothing techniques implemented >>>> in QEMU and KVM, but this looks okay given that Linux guests expect >>>> this. >>> >>> Yeah, even KVM applies a minimum period of 200us to the x86 LAPIC timer. >> >> Can we please merge this so guests can boot on 4.1? > > Cédric pointed out this lacks my reviewed by. I had not provided it in > the past as I wondered if we could come up with a better fix. However, > I consider this a good fix for 4.1, and if sometime finds time to > further rework the timer model in the future then we can do that work > later. Agreed. > > Reviewed-by: Joel Stanley > Tested-by: Joel Stanley Reviewed-by: Philippe Mathieu-Daudé