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| author | Dr. David Alan Gilbert | 2018-03-12 18:21:19 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin | 2018-03-20 15:40:37 +0100 |
| commit | c639187e3342cb14e100d14ce4854444f7ae98d5 (patch) | |
| tree | 9bd69185b44dc99ac945cd309b1597a639cd0784 /docs | |
| parent | libvhost-user: mprotect & madvises for postcopy (diff) | |
| download | qemu-c639187e3342cb14e100d14ce4854444f7ae98d5.tar.gz qemu-c639187e3342cb14e100d14ce4854444f7ae98d5.tar.xz qemu-c639187e3342cb14e100d14ce4854444f7ae98d5.zip | |
vhost-user: Add VHOST_USER_POSTCOPY_END message
This message is sent just before the end of postcopy to get the
client to stop using userfault since we wont respond to any more
requests. It should close userfaultfd so that any other pages
get mapped to the backing file automatically by the kernel, since
at this point we know we've received everything.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/interop/vhost-user.txt | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/docs/interop/vhost-user.txt b/docs/interop/vhost-user.txt index e295ef12ca..c058c407df 100644 --- a/docs/interop/vhost-user.txt +++ b/docs/interop/vhost-user.txt @@ -729,6 +729,18 @@ Master message types This is always sent sometime after a VHOST_USER_POSTCOPY_ADVISE, and thus only when VHOST_USER_PROTOCOL_F_PAGEFAULT is supported. + * VHOST_USER_POSTCOPY_END + Id: 30 + Slave payload: u64 + + Master advises that postcopy migration has now completed. The + slave must disable the userfaultfd. The response is an acknowledgement + only. + When VHOST_USER_PROTOCOL_F_PAGEFAULT is supported, this message + is sent at the end of the migration, after VHOST_USER_POSTCOPY_LISTEN + was previously sent. + The value returned is an error indication; 0 is success. + Slave message types ------------------- |