Re: [kvm-devel] [PATCH 3/8] SVM: add module parameter to disable NestedPaging
Generally I see no problem with it. But at least for NPT I don't see a reason why someone should want to disable it on a VM basis (as far as it works stable). Avi, what do you think? 1. This is more user-friendly and easier-to-find 2. A lot of people would like to view (and Demo) it side-by-side. 3. Useful for BETA-testing of KVM. -- -Alexey Eremenko Technologov - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
Re: [kvm-devel] [PATCH 3/8] SVM: add module parameter to disable NestedPaging
On Sat, Jan 26, 2008 at 11:49:17AM +0200, Alexey Eremenko wrote: Generally I see no problem with it. But at least for NPT I don't see a reason why someone should want to disable it on a VM basis (as far as it works stable). Avi, what do you think? 1. This is more user-friendly and easier-to-find 2. A lot of people would like to view (and Demo) it side-by-side. 3. Useful for BETA-testing of KVM. Ok, agreed. I will add this feature. Joerg - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
Re: [kvm-devel] [PATCH 3/8] SVM: add module parameter to disable NestedPaging
Alexey Eremenko wrote: Generally I see no problem with it. But at least for NPT I don't see a reason why someone should want to disable it on a VM basis (as far as it works stable). Avi, what do you think? 1. This is more user-friendly and easier-to-find I'm inclined to disagree. Why add an additional thing for people to tune if they really shouldn't need to. Once NPT/EPT support are stable, is there any reason to want to disable it? Regards, Anthony Liguori 2. A lot of people would like to view (and Demo) it side-by-side. 3. Useful for BETA-testing of KVM. - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
Re: [kvm-devel] [PATCH 3/8] SVM: add module parameter to disable NestedPaging
Joerg Roedel wrote: Generally I see no problem with it. But at least for NPT I don't see a reason why someone should want to disable it on a VM basis (as far as it works stable). Avi, what do you think? Unless there is a real-life workload that benefits from npt=0, I see no reason to have per-vm npt control. The module parameter is helpful, for to isolate npt problems and for development, but I don't see a need for users to fiddle with it. -- Any sufficiently difficult bug is indistinguishable from a feature. - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
Re: [kvm-devel] [PATCH 3/8] SVM: add module parameter to disable NestedPaging
On Fri, Jan 25, 2008 at 05:47:11PM -0800, Nakajima, Jun wrote: Joerg Roedel wrote: To disable the use of the Nested Paging feature even if it is available in hardware this patch adds a module parameter. Nested Paging can be disabled by passing npt=off to the kvm_amd module. I think it's better to use a (common) parameter to qemu. That way you can control on/off for each VM. Generally I see no problem with it. But at least for NPT I don't see a reason why someone should want to disable it on a VM basis (as far as it works stable). Avi, what do you think? Joerg - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
Re: [kvm-devel] [PATCH 3/8] SVM: add module parameter to disable NestedPaging
Joerg Roedel wrote: To disable the use of the Nested Paging feature even if it is available in hardware this patch adds a module parameter. Nested Paging can be disabled by passing npt=off to the kvm_amd module. I think it's better to use a (common) parameter to qemu. That way you can control on/off for each VM. Jun --- Intel Open Source Technology Center - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
