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| author | Fabiano Rosas <farosas@suse.de> | 2024-06-17 15:57:26 -0300 |
|---|---|---|
| committer | Fabiano Rosas <farosas@suse.de> | 2024-06-21 09:47:22 -0300 |
| commit | b43b61d5bee522dadf44b472af71aab7235c13d5 (patch) | |
| tree | f8fc16b33cdc39384d4836d9b18330db89bed3ba /qapi | |
| parent | 46cec74c1b71973756d8960a305bae1491ae6259 (diff) | |
| download | qemu-b43b61d5bee522dadf44b472af71aab7235c13d5.zip qemu-b43b61d5bee522dadf44b472af71aab7235c13d5.tar.gz qemu-b43b61d5bee522dadf44b472af71aab7235c13d5.tar.bz2 | |
migration: Add direct-io parameter
Add the direct-io migration parameter that tells the migration code to
use O_DIRECT when opening the migration stream file whenever possible.
This is currently only used with the mapped-ram migration that has a
clear window guaranteed to perform aligned writes.
Acked-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Diffstat (limited to 'qapi')
| -rw-r--r-- | qapi/migration.json | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/qapi/migration.json b/qapi/migration.json index 470f746..de6c8b0 100644 --- a/qapi/migration.json +++ b/qapi/migration.json @@ -821,6 +821,10 @@ # See description in @ZeroPageDetection. Default is 'multifd'. # (since 9.0) # +# @direct-io: Open migration files with O_DIRECT when possible. This +# only has effect if the @mapped-ram capability is enabled. +# (Since 9.1) +# # Features: # # @unstable: Members @x-checkpoint-delay and @@ -845,7 +849,8 @@ { 'name': 'x-vcpu-dirty-limit-period', 'features': ['unstable'] }, 'vcpu-dirty-limit', 'mode', - 'zero-page-detection'] } + 'zero-page-detection', + 'direct-io'] } ## # @MigrateSetParameters: @@ -991,6 +996,10 @@ # See description in @ZeroPageDetection. Default is 'multifd'. # (since 9.0) # +# @direct-io: Open migration files with O_DIRECT when possible. This +# only has effect if the @mapped-ram capability is enabled. +# (Since 9.1) +# # Features: # # @unstable: Members @x-checkpoint-delay and @@ -1030,7 +1039,8 @@ 'features': [ 'unstable' ] }, '*vcpu-dirty-limit': 'uint64', '*mode': 'MigMode', - '*zero-page-detection': 'ZeroPageDetection'} } + '*zero-page-detection': 'ZeroPageDetection', + '*direct-io': 'bool' } } ## # @migrate-set-parameters: @@ -1190,6 +1200,10 @@ # See description in @ZeroPageDetection. Default is 'multifd'. # (since 9.0) # +# @direct-io: Open migration files with O_DIRECT when possible. This +# only has effect if the @mapped-ram capability is enabled. +# (Since 9.1) +# # Features: # # @unstable: Members @x-checkpoint-delay and @@ -1226,7 +1240,8 @@ 'features': [ 'unstable' ] }, '*vcpu-dirty-limit': 'uint64', '*mode': 'MigMode', - '*zero-page-detection': 'ZeroPageDetection'} } + '*zero-page-detection': 'ZeroPageDetection', + '*direct-io': 'bool' } } ## # @query-migrate-parameters: |