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dev_manager: drop cache for dm tree manipulation

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We've got cached DM list before grabbing lock, so there
is some chance, that DM table has changed and we would
need to refresh this info.

TODO: benchmark, whether it would even make sense to refresh cache
and keep it content instead of using individual ioctl() for tree build.
This commit is contained in:
Zdenek Kabelac 2024-05-24 20:50:53 +02:00
parent d192477ae6
commit e211768d1c
1 changed files with 3 additions and 7 deletions
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10
lib/activate/dev_manager.c
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@ -3945,7 +3945,6 @@ static int _tree_action(struct dev_manager *dm, const struct logical_volume *lv,
struct dm_tree_node *root;
char *dlid;
int r = 0;
unsigned tmp_state;
if (action < DM_ARRAY_SIZE(_action_names))
log_debug_activation("Creating %s%s tree for %s.",
@ -3964,14 +3963,11 @@ static int _tree_action(struct dev_manager *dm, const struct logical_volume *lv,
dm->activation = ((action == PRELOAD) || (action == ACTIVATE));
dm->suspend = (action == SUSPEND_WITH_LOCKFS) || (action == SUSPEND);
/* ATM do not use caching for anything else then striped target.
* And also skip for CLEAN action */
tmp_state = dm->cmd->disable_dm_devs;
if (!seg_is_striped_target(first_seg(lv)) || (action == CLEAN))
dm->cmd->disable_dm_devs = 1;
/* Drop any cache before DM table manipulation within locked section
* TODO: check if it makes sense to manage cache within lock */
dm_device_list_destroy(&dm->cmd->cache_dm_devs);
dtree = _create_partial_dtree(dm, lv, laopts->origin_only);
dm->cmd->disable_dm_devs = tmp_state;
if (!dtree)
return_0;