Re: [PATCH V4 13/18] qemu: Support O_DIRECT with mapped-ram on save

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On Wed, Mar 05, 2025 at 03:48:22PM -0700, Jim Fehlig via Devel wrote:
> When using the mapped-ram migration capability, direct IO is
> enabled by setting the "direct-io" migration parameter to
> "true" and passing QEMU an additional fd with O_DIRECT set.
> 
> Signed-off-by: Jim Fehlig <jfehlig@xxxxxxxx>
> ---
>  src/qemu/qemu_driver.c           | 10 ++++++----
>  src/qemu/qemu_migration.c        | 32 ++++++++++++++++++++++++++------
>  src/qemu/qemu_migration.h        |  1 +
>  src/qemu/qemu_migration_params.c | 11 ++++++++++-
>  src/qemu/qemu_migration_params.h |  3 ++-
>  src/qemu/qemu_monitor.c          |  7 +++++--
>  src/qemu/qemu_monitor.h          |  3 ++-
>  src/qemu/qemu_saveimage.c        |  2 +-
>  8 files changed, 53 insertions(+), 16 deletions(-)

Reviewed-by: Daniel P. Berrangé <berrange@xxxxxxxxxx>


With regards,
Daniel
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