diff options
| author | Peter Lieven <pl@kamp.de> | 2013-03-26 10:58:37 +0100 |
|---|---|---|
| committer | Juan Quintela <quintela@redhat.com> | 2013-03-26 13:32:33 +0100 |
| commit | f1c72795af573b24a7da5eb52375c9aba8a37972 (patch) | |
| tree | 9475bdb59345550bb248fad75fa25e598811fe51 /qapi-schema.json | |
| parent | 78d07ae7ac74bcc7f79aeefbaff17fb142f44b4d (diff) | |
migration: do not sent zero pages in bulk stage
during bulk stage of ram migration if a page is a
zero page do not send it at all.
the memory at the destination reads as zero anyway.
even if there is an madvise with QEMU_MADV_DONTNEED
at the target upon receipt of a zero page I have observed
that the target starts swapping if the memory is overcommitted.
it seems that the pages are dropped asynchronously.
this patch also updates QMP to return the number of
skipped pages in MigrationStats.
Signed-off-by: Peter Lieven <pl@kamp.de>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Diffstat (limited to 'qapi-schema.json')
| -rw-r--r-- | qapi-schema.json | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/qapi-schema.json b/qapi-schema.json index 088f4e150f..6c4966be43 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -496,7 +496,9 @@ # # @total: total amount of bytes involved in the migration process # -# @duplicate: number of duplicate pages (since 1.2) +# @duplicate: number of duplicate (zero) pages (since 1.2) +# +# @skipped: number of skipped zero pages (since 1.5) # # @normal : number of normal pages (since 1.2) # @@ -509,8 +511,8 @@ ## { 'type': 'MigrationStats', 'data': {'transferred': 'int', 'remaining': 'int', 'total': 'int' , - 'duplicate': 'int', 'normal': 'int', 'normal-bytes': 'int', - 'dirty-pages-rate' : 'int' } } + 'duplicate': 'int', 'skipped': 'int', 'normal': 'int', + 'normal-bytes': 'int', 'dirty-pages-rate' : 'int' } } ## # @XBZRLECacheStats |