Symbol: ARC_FLAG_L2_WRITE_HEAD
usr/src/uts/common/fs/zfs/arc.c
631
#define HDR_L2_WRITE_HEAD(hdr) ((hdr)->b_flags & ARC_FLAG_L2_WRITE_HEAD)
usr/src/uts/common/fs/zfs/arc.c
8517
arc_hdr_set_flags(head, ARC_FLAG_L2_WRITE_HEAD | ARC_FLAG_HAS_L2HDR);