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| author | Dr. David Alan Gilbert | 2017-02-24 19:28:29 +0100 |
|---|---|---|
| committer | Dr. David Alan Gilbert | 2017-02-28 12:30:23 +0100 |
| commit | e8ca1db29b349e780743c504cb735c8e1d542a8c (patch) | |
| tree | b917e5911497dfbf56cea84d1e9080ec16d4a1a9 /include/migration | |
| parent | migration: fix use-after-free of to_dst_file (diff) | |
| download | qemu-e8ca1db29b349e780743c504cb735c8e1d542a8c.tar.gz qemu-e8ca1db29b349e780743c504cb735c8e1d542a8c.tar.xz qemu-e8ca1db29b349e780743c504cb735c8e1d542a8c.zip | |
postcopy: Transmit ram size summary word
Replace the host page-size in the 'advise' command by a pagesize
summary bitmap; if the VM is just using normal RAM then
this will be exactly the same as before, however if they're using
huge pages they'll be different, and thus:
a) Migration from/to old qemu's that don't understand huge pages
will fail early.
b) Migrations with different size RAMBlocks will also fail early.
This catches it very early; earlier than the detailed per-block
check in the next patch.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-Id: <20170224182844.32452-2-dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Diffstat (limited to 'include/migration')
| -rw-r--r-- | include/migration/migration.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/migration/migration.h b/include/migration/migration.h index 34a383ef4c..6272adfaba 100644 --- a/include/migration/migration.h +++ b/include/migration/migration.h @@ -378,6 +378,7 @@ void global_state_store_running(void); void flush_page_queue(MigrationState *ms); int ram_save_queue_pages(MigrationState *ms, const char *rbname, ram_addr_t start, ram_addr_t len); +uint64_t ram_pagesize_summary(void); PostcopyState postcopy_state_get(void); /* Set the state and return the old state */ |