pvclock vsyscall support + KVM hypervisor support (v5)
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- v1 Latest0 of 18 patches 1 replyIn review
v5 from the cover letter
- reduce preempt disable window in kvm_get_wallclock (Glauber)
- improve comment about SSE2 (Glauber)
Patches in v1 No applies recorded yet
None of the 18 patches the cover letter announces are in this archive.
Reviews trailers per patch
| Patch | John Stultz | Glauber Costa | Gleb Natapov |
|---|---|---|---|
| Series | A-b | A-b R-b A-b R-b A-b A-b | R-b |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes. Scroll the table sideways for all 3 reviewers.
Cover letter [patch 00/18] pvclock vsyscall support + KVM hypervisor support (v5)
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.
v5:
- reduce preempt disable window in kvm_get_wallclock (Glauber)
- improve comment about SSE2 (Glauber)
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.