Blame SOURCES/lvm2-2_03_12-pool-limit-pmspare-to-16GiB.patch

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 lib/metadata/pool_manip.c | 10 +++++++++-
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 1 file changed, 9 insertions(+), 1 deletion(-)
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diff --git a/lib/metadata/pool_manip.c b/lib/metadata/pool_manip.c
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index b67882e..1975cb4 100644
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--- a/lib/metadata/pool_manip.c
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+++ b/lib/metadata/pool_manip.c
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@@ -697,6 +697,8 @@ static struct logical_volume *_alloc_pool_metadata_spare(struct volume_group *vg
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 int handle_pool_metadata_spare(struct volume_group *vg, uint32_t extents,
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 			       struct dm_list *pvh, int poolmetadataspare)
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 {
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+	/* Max usable size of any spare volume is currently 16GiB rouned to extent size */
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+	const uint64_t MAX_SIZE = (UINT64_C(2 * 16) * 1024 * 1024 + vg->extent_size - 1) / vg->extent_size;
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 	struct logical_volume *lv = vg->pool_metadata_spare_lv;
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 	uint32_t seg_mirrors;
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 	struct lv_segment *seg;
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@@ -706,8 +708,11 @@ int handle_pool_metadata_spare(struct volume_group *vg, uint32_t extents,
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 		/* Find maximal size of metadata LV */
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 		dm_list_iterate_items(lvl, &vg->lvs)
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 			if (lv_is_pool_metadata(lvl->lv) &&
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-			    (lvl->lv->le_count > extents))
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+			    (lvl->lv->le_count > extents)) {
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 				extents = lvl->lv->le_count;
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+				if (extents >= MAX_SIZE)
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+					break;
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+			}
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 	if (!poolmetadataspare) {
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 		/* TODO: Not showing when lvm.conf would define 'n' ? */
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@@ -718,6 +723,9 @@ int handle_pool_metadata_spare(struct volume_group *vg, uint32_t extents,
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 		return 1;
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 	}
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+	if (extents > MAX_SIZE)
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+		extents = MAX_SIZE;
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+
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 	if (!lv) {
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 		if (!_alloc_pool_metadata_spare(vg, extents, pvh))
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 			return_0;