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qapi: Craft the dirty-limit capability comment

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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>
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Hyman Huang(黄勇) 2023-07-28 23:10:40 +08:00 committed by Markus Armbruster
parent 8abc81150f
commit ef96537732
1 changed files with 5 additions and 8 deletions
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13
qapi/migration.json
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@ -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:
#