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Re: [Qemu-devel] [PATCH v3 0/9] ahci: enable migration
From: |
John Snow |
Subject: |
Re: [Qemu-devel] [PATCH v3 0/9] ahci: enable migration |
Date: |
Tue, 05 May 2015 18:45:36 -0400 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 |
On 04/30/2015 02:07 PM, John Snow wrote:
> 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(-)
>
Staged: https://github.com/jnsnow/qemu/commits/ide
(with one edit to patch 3 as suggested by Kevin.)
--js
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