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authorAlan Somers <[email protected]>2017-05-24 06:34:56 -0400
committerBrian Behlendorf <[email protected]>2017-05-25 17:15:06 -0700
commit00710365261a89abc127efa7fae5fe36d0fae7d1 (patch)
tree57d16cf8c16ac463cb477b02e1972ee5effaf2ad /module/zfs/dbuf.c
parent959f56b99366c8727647b5b19fb3d47555c96cf3 (diff)
OpenZFS 8070 - Add some ZFS comments
Authored by: Alan Somers <[email protected]> Reviewed by: Yuri Pankov <[email protected]> Reviewed by: Matthew Ahrens <[email protected]> Approved by: Robert Mustacchi <[email protected]> Reviewed-by: Giuseppe Di Natale <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Ported-by: bunder2015 <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/8070 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/40713f2 Closes #6160
Diffstat (limited to 'module/zfs/dbuf.c')
-rw-r--r--module/zfs/dbuf.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/module/zfs/dbuf.c b/module/zfs/dbuf.c
index d347c5b91..1575cc1b4 100644
--- a/module/zfs/dbuf.c
+++ b/module/zfs/dbuf.c
@@ -1300,6 +1300,11 @@ dbuf_unoverride(dbuf_dirty_record_t *dr)
uint64_t txg = dr->dr_txg;
ASSERT(MUTEX_HELD(&db->db_mtx));
+ /*
+ * This assert is valid because dmu_sync() expects to be called by
+ * a zilog's get_data while holding a range lock. This call only
+ * comes from dbuf_dirty() callers who must also hold a range lock.
+ */
ASSERT(dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC);
ASSERT(db->db_level == 0);