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-rw-r--r--usr/src/uts/common/sys/fs/zfs.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/usr/src/uts/common/sys/fs/zfs.h b/usr/src/uts/common/sys/fs/zfs.h
index 0356d7f05b..bd3adf67f8 100644
--- a/usr/src/uts/common/sys/fs/zfs.h
+++ b/usr/src/uts/common/sys/fs/zfs.h
@@ -601,6 +601,8 @@ typedef struct zpool_rewind_policy {
/*
* This is needed in userland to report the minimum necessary device size.
+ *
+ * Note that the zfs test suite uses 64MB vdevs.
*/
#define SPA_MINDEVSIZE (64ULL << 20)