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debug: for checking how find_lv works

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To see whether use of 'radix_tree' for every find_lv() call helps.
As if we drop radix_tree after import, this code then may
fallback to old slower find_lv_in_vg.
This commit is contained in:
Zdenek Kabelac 2024-10-13 11:11:53 +02:00
parent 785572fb65
commit 1ddc36b5b6
2 changed files with 11 additions and 0 deletions
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6
lib/format_text/import_vsn1.c
View File

@ -1324,6 +1324,12 @@ static struct volume_group *_read_vg(struct cmd_context *cmd,
vg->pv_names = NULL; /* PV names are no longer valid outside of _read_vg() */ vg->pv_names = NULL; /* PV names are no longer valid outside of _read_vg() */
} }
if (0 && vg->lv_names) {
/* TODO: update also rename function to keep lv_names always valid and usable */
radix_tree_destroy(vg->lv_names);
vg->lv_names = NULL;
}
/* /*
* Finished. * Finished.
*/ */

5
lib/metadata/metadata.c
View File

@ -1671,6 +1671,11 @@ struct logical_volume *find_lv_in_vg_by_lvid(const struct volume_group *vg,
struct logical_volume *find_lv(const struct volume_group *vg, struct logical_volume *find_lv(const struct volume_group *vg,
const char *lv_name) const char *lv_name)
{ {
if (!vg->lv_names) {
struct lv_list *lvl = find_lv_in_vg(vg, lv_name);
return lvl ? lvl->lv : NULL;
}
return radix_tree_lookup_ptr(vg->lv_names, lv_name, strlen(lv_name)); return radix_tree_lookup_ptr(vg->lv_names, lv_name, strlen(lv_name));
} }