[Qemu-devel] [PATCH v3 0/9] ahci: enable migration

[John Snow <jsnow@redhat.com>]

The day we all feared is here, and I am proposing we allow the migration
of the AHCI device tentatively for the 2.4 development window.

There are some more NCQ migration tests are needed, but I felt that it was
important to get migration enabled as close to the start of the 2.4
development window as possible.

If the NCQ patches don't pan out by the time the 2.4 freeze occurs, we can
revert the migration boolean and add a conditional around the ahci tests
that rely on the migration feature being enabled.

I am justifying this checkin based on a series of ping-pong
migration tests I ran under heavy load (using google's stressapptest)
and saw over 300 successful migrations without a single failure.

This series does a few things:
(1) Add migration facilities to libqos
(2) Enable AHCI and ICH9 migration
(3) Add a series of migration tests to ahci-test

v3:
 - Rebase and resend for 2.4.
 - Minor style guide fix.

v2:
 - Added a URI parameter to the migrate() helper
 - Adjust ahci_shutdown to set qtest context for itself
 - Make sure verify() is part of ahci_migrate() and redundant
   calls are eliminated
 - Add new helpers to make tests with blkdebug injections more
   succint
 - Change the flush migrate test to not load the blkdebug rule
   on the destination host
 - Modify the migrate() function so that it does not poll the
   VM for migration status if it can rely on RESUME events.
 - New patch: Repair the ahci_command_set_offset helper.
 - New test: Test DMA halt and resume.
 - New test: Test DMA halt, migrate, and resume.

==
For convenience, this branch is available at:
https://github.com/jnsnow/qemu.git branch ahci-migration-test
https://github.com/jnsnow/qemu/tree/ahci-migration-test

This version is tagged ahci-migration-test-v3:
https://github.com/jnsnow/qemu/releases/tag/ahci-migration-test-v3
==

John Snow (9):
  libqos/ahci: Add halted command helpers
  libqos/ahci: Fix sector set method
  libqos: Add migration helpers
  ich9/ahci: Enable Migration
  qtest/ahci: Add migration test
  qtest/ahci: add migrate dma test
  qtest/ahci: add flush migrate test
  qtest/ahci: add halted dma test
  qtest/ahci: add migrate halted dma test

 hw/ide/ahci.c         |   1 -
 hw/ide/ich.c          |   1 -
 tests/ahci-test.c     | 318 +++++++++++++++++++++++++++++++++++++++++++++++++-
 tests/libqos/ahci.c   |  34 +++++-
 tests/libqos/ahci.h   |   3 +
 tests/libqos/libqos.c |  84 +++++++++++++
 tests/libqos/libqos.h |   2 +
 tests/libqos/malloc.c |  74 +++++++++---
 tests/libqos/malloc.h |   1 +
 9 files changed, 496 insertions(+), 22 deletions(-)

-- 
2.1.0