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lv_ondisk: option search for lv without vg_ondisk

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When vg_ondisk is NULL we do not need to search
through the whole VG to find out the same LV.

NOTE: as of now - VG locking is not enabled as some code parts
are breaking memory locking rules (lvm2app).

Once we enforce VG locking for read-only commands the effect
will be much better for larger VGs.
This commit is contained in:
Zdenek Kabelac 2014-09-21 23:10:04 +02:00
parent 0f2adcc9ef
commit 9776979b02
2 changed files with 4 additions and 3 deletions
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1
WHATS_NEW
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@ -1,5 +1,6 @@
Version 2.02.112 - Version 2.02.112 -
===================================== =====================================
Improve search of LV in lv_ondisk().
Do not scan sysfs in lv_check_not_in_use() when device is closed. Do not scan sysfs in lv_check_not_in_use() when device is closed.
Backup final metadata after resync of mirror/raid. Backup final metadata after resync of mirror/raid.
Unify handling of --persistent option for lvcreate and lvchange. Unify handling of --persistent option for lvcreate and lvchange.

6
lib/metadata/metadata.c
View File

@ -4813,10 +4813,10 @@ struct logical_volume *lv_ondisk(struct logical_volume *lv)
if (!lv) if (!lv)
return NULL; return NULL;
vg = lv->vg; if (!lv->vg->vg_ondisk)
return lv;
if (vg->vg_ondisk) vg = lv->vg->vg_ondisk;
vg = vg->vg_ondisk;
dm_list_iterate_items(lvl, &vg->lvs) dm_list_iterate_items(lvl, &vg->lvs)
if (!strncmp(lvl->lv->lvid.s, lv->lvid.s, sizeof(lv->lvid))) if (!strncmp(lvl->lv->lvid.s, lv->lvid.s, sizeof(lv->lvid)))