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block: New BdrvChildRole.activate() for blk_resume_after_migration()

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Instead of manually calling blk_resume_after_migration() in migration
code after doing bdrv_invalidate_cache_all(), integrate the BlockBackend
activation with cache invalidation into a single function. This is
achieved with a new callback in BdrvChildRole that is called by
bdrv_invalidate_cache_all().

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Kevin Wolf 2017-05-04 18:52:37 +02:00
parent ace21a5875
commit 4417ab7adf
7 changed files with 44 additions and 43 deletions
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3
migration/savevm.c
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@ -1615,9 +1615,6 @@ static void loadvm_postcopy_handle_run_bh(void *opaque)
/* Make sure all file formats flush their mutable metadata.
* If we get an error here, just don't restart the VM yet. */
bdrv_invalidate_cache_all(&local_err);
if (!local_err) {
blk_resume_after_migration(&local_err);
}
if (local_err) {
error_report_err(local_err);
local_err = NULL;