From: Lin Ma <l...@suse.com>
Sometimes the query-block performs time-consuming I/O(say waiting for
the fstat of NFS complete), So let's make this QMP handler runs in a
coroutine.
The following patch moves the fstat() into a thread pool.
Signed-off-by: Lin Ma <l...@suse.com>
Signed-off-by: Fabiano Rosas <faro...@suse.de>
---
blockdev.c | 6 +++---
qapi/block-core.json | 3 ++-
2 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/blockdev.c b/blockdev.c
index 5d56b79df4..6412548662 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -2804,9 +2804,9 @@ void qmp_drive_backup(DriveBackup *backup, Error **errp)
blockdev_do_action(&action, errp);
}
-BlockDeviceInfoList *qmp_query_named_block_nodes(bool has_flat,
- bool flat,
- Error **errp)
+BlockDeviceInfoList *coroutine_fn qmp_query_named_block_nodes(bool has_flat,
+ bool flat,
+ Error **errp)
{
bool return_flat = has_flat && flat;
diff --git a/qapi/block-core.json b/qapi/block-core.json
index da95fe456c..0559c38412 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -1972,7 +1972,8 @@
{ 'command': 'query-named-block-nodes',
'returns': [ 'BlockDeviceInfo' ],
'data': { '*flat': 'bool' },
- 'allow-preconfig': true }
+ 'allow-preconfig': true,
+ 'coroutine': true}
##
# @XDbgBlockGraphNodeType:
--
2.35.3
