This patchset, based on earlier work by Jeremy Fitzhardinge, implements paravirtual clock vsyscall support. It should be possible to implement Xen support relatively easily. It reduces clock_gettime from 500 cycles to 200 cycles on my testbox. Please review. v4: - remove aligned_pvti structure, align directly (Glauber) - add comments to migration notifier (Glauber) - mark migration notifier condition as unlikely (Glauber) - add comment about rdtsc barrier dependency on sse2 (Gleb) - add idea to improve vdso gettime call (Gleb) - remove new msr interface, reuse kernel copy of pvclock data (Glauber) - move copying of timekeeping data from generic timekeeping code to kvm code (John) v3: - fix PVCLOCK_VSYSCALL_NR_PAGES definition (glommer) - fold flags race fix into pvclock refactoring (avi) - remove CONFIG_PARAVIRT_CLOCK_VSYSCALL (glommer) - add reference to tsc.c from vclock_gettime.c about cycle_last rationale (glommer) - fix whitespace damage (glommer) v2: - Do not allow visibility of different <system_timestamp, tsc_timestamp> tuples. - Add option to disable vsyscall. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
