RFC Separate thread for VM migration
Get series with b4
b4 am [email protected]Versions newest first · linked by author and title
- v5 RFC Latest4 patches 5 repliesIn review
- v4 RFC4 of 5 patches 8 repliesSuperseded
- v3 RFC4 patches 14 repliesSuperseded
Earlier versions · 2
| Version | Posted | Patches | Replies | Status |
|---|---|---|---|---|
| v2 RFC | 3 patches | 7 replies | Superseded | |
| v1 RFC | 2 patches | 1 reply | Superseded |
Patches in v5 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/4 | MRU ram listcpu-all.h exec.c | +14 | 0 replies | |
| 2/4 | Migration thread mutexarch_init.c cpu-all.h exec.c +1 more | +49 | 1 reply | |
| 3/4 | Separate migration bitmaparch_init.c cpu-all.h exec.c | +102 | 0 replies | |
| 4/4 | Separate thread for VM migrationbuffered_file.c migration.c migration.h +3 more | +132 | 0 replies |
Reviews trailers per patch
No Reviewed-by, Acked-by or Tested-by trailers for v5 yet.
Cover letter [RFC PATCH v5 0/4] Separate thread for VM migration
Following patch series deals with VCPU and iothread starvation during the migration of a guest. Currently the iothread is responsible for performing the guest migration. It holds qemu_mutex during the migration and doesn't allow VCPU to enter the qemu mode and delays its return to the guest. The guest migration, executed as an iohandler also delays the execution of other iohandlers. In the following patch series,
The migration has been moved to a separate thread to reduce the qemu_mutex contention and iohandler starvation.
Umesh Deshpande (4):
MRU ram block list
migration thread mutex
separate migration bitmap
separate migration thread
arch_init.c | 38 ++++++++++++---- buffered_file.c | 75 +++++++++++++++++-------------- cpu-all.h | 42 +++++++++++++++++ exec.c | 97 ++++++++++++++++++++++++++++++++++++++-- migration.c | 122 +++++++++++++++++++++++++++++--------------------- migration.h | 9 ++++ qemu-common.h | 2 + qemu-thread-posix.c | 10 ++++ qemu-thread.h | 1 + savevm.c | 5 -- 10 files changed, 297 insertions(+), 104 deletions(-)
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1.7.4.1