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device_mapper: reduce unnecessary looping passed

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While looping through the list of nodes, check if there is higher
priority present and another iteration is still needed.
This commit is contained in:
Zdenek Kabelac 2023-01-30 14:31:04 +01:00
parent f89c369a01
commit 85aa236946
1 changed files with 9 additions and 3 deletions
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12
device_mapper/libdm-deptree.c
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@ -2040,7 +2040,7 @@ int dm_tree_activate_children(struct dm_tree_node *dnode,
struct dm_tree_node *child = dnode;
const char *name;
const char *uuid;
int priority;
int priority, next_priority;
/* Activate children first */
while ((child = dm_tree_next_child(&handle, dnode, 0))) {
@ -2058,12 +2058,16 @@ int dm_tree_activate_children(struct dm_tree_node *dnode,
}
handle = NULL;
for (priority = 0; priority < 3; priority++) {
awaiting_peer_rename = 0;
next_priority = 0;
while ((child = dm_tree_next_child(&handle, dnode, 0))) {
if (priority != child->activation_priority)
if (priority != child->activation_priority) {
if ((next_priority < child->activation_priority) &&
(child->activation_priority > priority))
next_priority = child->activation_priority;
continue;
}
if (!(uuid = dm_tree_node_get_uuid(child))) {
stack;
@ -2121,6 +2125,8 @@ int dm_tree_activate_children(struct dm_tree_node *dnode,
}
if (awaiting_peer_rename)
priority--; /* redo priority level */
else if (!next_priority)
break; /* no more work, higher priority was not found in the chain */
}
return r;