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[Qemu-devel] [PATCH V5 9/9] migration: postcopy_blocktime documentation


From: Alexey Perevalov
Subject: [Qemu-devel] [PATCH V5 9/9] migration: postcopy_blocktime documentation
Date: Fri, 12 May 2017 16:31:26 +0300

Signed-off-by: Alexey Perevalov <address@hidden>
---
 docs/migration.txt | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/docs/migration.txt b/docs/migration.txt
index 1b940a8..d0f5a6d 100644
--- a/docs/migration.txt
+++ b/docs/migration.txt
@@ -402,6 +402,16 @@ will now cause the transition from precopy to postcopy.
 It can be issued immediately after migration is started or any
 time later on.  Issuing it after the end of a migration is harmless.
 
+Blocktime it's a postcopy live migration metric, intend to show
+when source vCPU was in state interruptable sleep due to pagefault.
+This value is calculated on destination side.
+To enable postcopy blocktime calculation, enter following command on 
destination
+monitor:
+
+migrate_set_capability postcopy-blocktime on
+
+Postcopy blocktime could be retrieved by query-migrate qmp command.
+
 Note: During the postcopy phase, the bandwidth limits set using
 migrate_set_speed is ignored (to avoid delaying requested pages that
 the destination is waiting for).
-- 
1.9.1




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