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| author | Hyman Huang(黄勇) <yong.huang@smartx.com> | 2023-07-28 23:10:40 +0800 |
|---|---|---|
| committer | Markus Armbruster <armbru@redhat.com> | 2023-08-02 09:33:38 +0200 |
| commit | ef965377325e186ce1f73e5f40d07d77e2cc9410 (patch) | |
| tree | c221eec42cd0bb6728be1ed0026fc6af16d016fe | |
| parent | 8abc81150f2de51eabd75ef13117f6f1561a18a5 (diff) | |
| download | focaccia-qemu-ef965377325e186ce1f73e5f40d07d77e2cc9410.tar.gz focaccia-qemu-ef965377325e186ce1f73e5f40d07d77e2cc9410.zip | |
qapi: Craft the dirty-limit capability comment
Signed-off-by: Hyman Huang(黄勇) <yong.huang@smartx.com> Message-ID: <169073570563.19893.2928364761104733482-2@git.sr.ht> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
| -rw-r--r-- | qapi/migration.json | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/qapi/migration.json b/qapi/migration.json index dffa60fd91..8843e74b59 100644 --- a/qapi/migration.json +++ b/qapi/migration.json @@ -519,14 +519,11 @@ # are present. 'return-path' capability must be enabled to use # it. (since 8.1) # -# @dirty-limit: If enabled, migration will use the dirty-limit -# algorithim to throttle down guest instead of auto-converge -# algorithim. Throttle algorithim only works when vCPU's dirtyrate -# greater than 'vcpu-dirty-limit', read processes in guest os -# aren't penalized any more, so this algorithim can improve -# performance of vCPU during live migration. This is an optional -# performance feature and should not affect the correctness of the -# existing auto-converge algorithim. (Since 8.1) +# @dirty-limit: If enabled, migration will throttle vCPUs as needed to +# keep their dirty page rate within @vcpu-dirty-limit. This can +# improve responsiveness of large guests during live migration, +# and can result in more stable read performance. Requires KVM +# with accelerator property "dirty-ring-size" set. (Since 8.1) # # Features: # |