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Diffstat (limited to 'docs/devel/migration/mapped-ram.rst')
| -rw-r--r-- | docs/devel/migration/mapped-ram.rst | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/docs/devel/migration/mapped-ram.rst b/docs/devel/migration/mapped-ram.rst index fa4cefd9fc..d352b546e9 100644 --- a/docs/devel/migration/mapped-ram.rst +++ b/docs/devel/migration/mapped-ram.rst @@ -16,7 +16,7 @@ location in the file, rather than constantly being added to a sequential stream. Having the pages at fixed offsets also allows the usage of O_DIRECT for save/restore of the migration stream as the pages are ensured to be written respecting O_DIRECT alignment -restrictions (direct-io support not yet implemented). +restrictions. Usage ----- @@ -35,6 +35,10 @@ Use a ``file:`` URL for migration: Mapped-ram migration is best done non-live, i.e. by stopping the VM on the source side before migrating. +For best performance enable the ``direct-io`` parameter as well: + + ``migrate_set_parameter direct-io on`` + Use-cases --------- |