motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-07-29 05:13:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

postcopy: Transmit ram size summary word

Browse source 
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>
This commit is contained in:
Dr. David Alan Gilbert 2017-02-24 18:28:29 +00:00
parent f9c8caa04f
commit e8ca1db29b
3 changed files with 39 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

1
include/migration/migration.h
View file

@ -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 */