[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] Re: performance regression from c/s 21647:cfba1560054a
>>> On 10.11.11 at 16:00, Gianluca Guida <glguida@xxxxxxxxx> wrote: > On Thu, Nov 10, 2011 at 6:59 AM, Stefano Stabellini > <stefano.stabellini@xxxxxxxxxxxxx> wrote: >> On Thu, 10 Nov 2011, Jan Beulich wrote: >>> It's SLE11 SP1 guests that suffered a regression after a maintenance >>> update (originally shipped with 4.0.0, while that patch got backported >>> later into 4.0.x). >> >> Is SLES11 SP1 using HVMOP_pagetable_dying (see >> arch/x86/xen/mmu.c:xen_hvm_init_mmu_ops)? > > Good question. In case it does not, just changing the ">l1" check to > work only in case we used the hypercall might do the trick. Possibly, though I would argue that the difference between Linuxes shouldn't be that big (i.e. I would rather expect that pv-on-hvm guests also see a performance penalty here). Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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