EXTENT_FLAG_LOGGING
if (list_empty(&em->list) || (em->flags & EXTENT_FLAG_LOGGING))
ASSERT(!(em->flags & EXTENT_FLAG_LOGGING));
if (em->flags & EXTENT_FLAG_LOGGING)
em->flags &= ~EXTENT_FLAG_LOGGING;
if (!(em->flags & EXTENT_FLAG_LOGGING))
if (!(cur->flags & EXTENT_FLAG_LOGGING))
em->flags &= ~(EXTENT_FLAG_PINNED | EXTENT_FLAG_LOGGING);
em->flags &= ~(EXTENT_FLAG_PINNED | EXTENT_FLAG_LOGGING);
em->flags |= EXTENT_FLAG_LOGGING;
{ EXTENT_FLAG_LOGGING, "LOGGING" })