| Date | Wed, 22 Mar 2006 16:16:54 -0800 | From | Zachary Amsden <> | Subject | Re: [RFC PATCH 17/35] Segment register changes for Xen |
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Chris Wright wrote: > 1. We clear FS/GS before changing TLS entries and switching LDT, as > otherwise the hypervisor will fail to restore thread-local values on > return to the guest kernel and we take a slow exception path. >
This should not be needed. You should clear FS/GS that match updated descriptors in your descriptor validation code instead. And you will get better performance for both native and the hypervisor cases. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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