From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Mon, 29 Jan 2018 08:20:50 +0100 From: Greg KH To: "Michael Kelley (EOSG)" Cc: "linux-kernel@vger.kernel.org" , "devel@linuxdriverproject.org" , "olaf@aepfle.de" , "apw@canonical.com" , "vkuznets@redhat.com" , "jasowang@redhat.com" , "leann.ogasawara@canonical.com" , "marcelo.cerri@canonical.com" , Stephen Hemminger , KY Srinivasan Subject: Re: [PATCH v3 char-misc 1/1] Drivers: hv: vmbus: Implement Direct Mode for stimer0 Message-ID: <20180129072050.GA3575@kroah.com> References: <1517173490-15112-1-git-send-email-mikelley@ntdev.microsoft.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1517173490-15112-1-git-send-email-mikelley@ntdev.microsoft.com> User-Agent: Mutt/1.9.3 (2018-01-21) X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Sun, Jan 28, 2018 at 09:06:48PM +0000, Michael Kelley (EOSG) wrote: > From: Michael Kelley > > The 2016 version of Hyper-V offers the option to operate the guest VM > per-vcpu stimer's in Direct Mode, which means the timer interupts on its > own vector rather than queueing a VMbus message. Direct Mode reduces > timer processing overhead in both the hypervisor and the guest, and > avoids having timer interrupts pollute the VMbus interrupt stream for > the synthetic NIC and storage. This patch enables Direct Mode by > default on stimer0 when running on a version of Hyper-V that supports it, > with a hv_vmbus module parameter for disabling Direct Mode and reverting > to the old behavior. You didn't change the text here as there is no more module parameter :( > --- a/drivers/hv/hv.c > +++ b/drivers/hv/hv.c > @@ -27,8 +27,9 @@ > #include > #include > #include > -#include > +#include > #include > +#include Still need this .h file? thanks, greg k-h