From mboxrd@z Thu Jan 1 00:00:00 1970 From: ebiederm@xmission.com (Eric W. Biederman) Subject: Re: [patch 14/21] Xen-paravirt: Add XEN config options and disable unsupported config options. Date: Fri, 16 Feb 2007 00:33:58 -0700 Message-ID: References: <20070216022449.739760547@goop.org> <20070216022531.570154735@goop.org> <45D54BFF.80100@vmware.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <45D54BFF.80100@vmware.com> (Zachary Amsden's message of "Thu, 15 Feb 2007 22:15:27 -0800") List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.osdl.org Errors-To: virtualization-bounces@lists.osdl.org To: Zachary Amsden Cc: Chris Wright , virtualization@lists.osdl.org, xen-devel@lists.xensource.com, Ian Pratt , Andi Kleen , Andrew Morton , linux-kernel@vger.kernel.org List-Id: virtualization@lists.linuxfoundation.org Zachary Amsden writes: > > We do support different HZ values, although 100HZ is actually preferable = for us, > so I don't object to that. PREEMPT is supported by us, but not as tested= as I > would like, so I also don't object to dropping it for generic paravirt gu= ests - > Rusty - Avi any objections to dropping preempt in terms of lguest/KVM > paravirtualization? > > Paravirt-ops definitely needs a hook for kexec, although we should not di= sable > kexec for the natively booted paravirt-ops. Eric - is there a way to dis= able it > at runtime? > > We do support the doublefault task gate, and it would be good to keep it,= but I > can't complain so much if it is gone from generic paravirt kernels for no= w, > because it is non-essential, and generally fatal anyway. We do need it f= or > native boots of paravirt-ops kernels, however, so turning off the config = option > still needs to be revisited Have machine_kexec_prepare fail. I think your machine description or paravirt_ops or whatever it is needs to hook both machine_kexec_prepare and machine_kexec. I know there actually has been some work to get kexec actually working under Xen but I don't know where that has gone. Eric