diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index a9e0c38..29af512 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -111,8 +111,7 @@
 					 uint	flags);
 STATIC void		xlog_ticket_put(xlog_t *log, xlog_ticket_t *ticket);
 
-/* local debug functions */
-#if defined(DEBUG) && !defined(XLOG_NOLOG)
+#if defined(DEBUG)
 STATIC void	xlog_verify_dest_ptr(xlog_t *log, __psint_t ptr);
 STATIC void	xlog_verify_grant_head(xlog_t *log, int equals);
 STATIC void	xlog_verify_iclog(xlog_t *log, xlog_in_core_t *iclog,
@@ -128,26 +127,7 @@
 
 STATIC int	xlog_iclogs_empty(xlog_t *log);
 
-#ifdef DEBUG
-int xlog_do_error = 0;
-int xlog_req_num  = 0;
-int xlog_error_mod = 33;
-#endif
-
-#define XLOG_FORCED_SHUTDOWN(log)	(log->l_flags & XLOG_IO_ERROR)
-
-/*
- * 0 => disable log manager
- * 1 => enable log manager
- * 2 => enable log manager and log debugging
- */
-#if defined(XLOG_NOLOG) || defined(DEBUG)
-int   xlog_debug = 1;
-xfs_buftarg_t *xlog_target;
-#endif
-
 #if defined(XFS_LOG_TRACE)
-
 void
 xlog_trace_loggrant(xlog_t *log, xlog_ticket_t *tic, xfs_caddr_t string)
 {
@@ -183,31 +163,16 @@
 void
 xlog_trace_iclog(xlog_in_core_t *iclog, uint state)
 {
-	pid_t pid;
-
-	pid = current_pid();
-
 	if (!iclog->ic_trace)
 		iclog->ic_trace = ktrace_alloc(256, KM_SLEEP);
 	ktrace_enter(iclog->ic_trace,
 		     (void *)((unsigned long)state),
-		     (void *)((unsigned long)pid),
-		     (void *)0,
-		     (void *)0,
-		     (void *)0,
-		     (void *)0,
-		     (void *)0,
-		     (void *)0,
-		     (void *)0,
-		     (void *)0,
-		     (void *)0,
-		     (void *)0,
-		     (void *)0,
-		     (void *)0,
-		     (void *)0,
-		     (void *)0);
+		     (void *)((unsigned long)current_pid()),
+		     (void *)NULL, (void *)NULL, (void *)NULL, (void *)NULL,
+		     (void *)NULL, (void *)NULL, (void *)NULL, (void *)NULL,
+		     (void *)NULL, (void *)NULL, (void *)NULL, (void *)NULL,
+		     (void *)NULL, (void *)NULL);
 }
-
 #else
 #define	xlog_trace_loggrant(log,tic,string)
 #define	xlog_trace_iclog(iclog,state)
@@ -244,11 +209,6 @@
 	xlog_ticket_t	*ticket = (xfs_log_ticket_t) xtic;
 	xfs_lsn_t	lsn	= 0;
 
-#if defined(DEBUG) || defined(XLOG_NOLOG)
-	if (!xlog_debug && xlog_target == log->l_targ)
-		return 0;
-#endif
-
 	if (XLOG_FORCED_SHUTDOWN(log) ||
 	    /*
 	     * If nothing was ever written, don't write out commit record.
@@ -316,11 +276,6 @@
 	if (!log_flushed)
 		log_flushed = &dummy;
 
-#if defined(DEBUG) || defined(XLOG_NOLOG)
-	if (!xlog_debug && xlog_target == log->l_targ)
-		return 0;
-#endif
-
 	ASSERT(flags & XFS_LOG_FORCE);
 
 	XFS_STATS_INC(xs_log_force);
@@ -348,10 +303,6 @@
 	xlog_in_core_t	  *iclog = (xlog_in_core_t *)iclog_hndl;
 	int	abortflg, spl;
 
-#if defined(DEBUG) || defined(XLOG_NOLOG)
-	if (!xlog_debug && xlog_target == log->l_targ)
-		return 0;
-#endif
 	cb->cb_next = NULL;
 	spl = LOG_LOCK(log);
 	abortflg = (iclog->ic_state & XLOG_STATE_IOERROR);
@@ -402,13 +353,8 @@
 {
 	xlog_t		*log = mp->m_log;
 	xlog_ticket_t	*internal_ticket;
-	int		retval;
+	int		retval = 0;
 
-#if defined(DEBUG) || defined(XLOG_NOLOG)
-	if (!xlog_debug && xlog_target == log->l_targ)
-		return 0;
-#endif
-	retval = 0;
 	ASSERT(client == XFS_TRANSACTION || client == XFS_LOG);
 	ASSERT((flags & XFS_LOG_NOSLEEP) == 0);
 
@@ -470,13 +416,6 @@
 
 	mp->m_log = xlog_alloc_log(mp, log_target, blk_offset, num_bblks);
 
-#if defined(DEBUG) || defined(XLOG_NOLOG)
-	if (!xlog_debug) {
-		cmn_err(CE_NOTE, "logdev: %s", mp->m_logname ?
-			mp->m_logname : "internal");
-		return 0;
-	}
-#endif
 	/*
 	 * skip log recovery on a norecovery mount.  pretend it all
 	 * just worked.
@@ -580,11 +519,6 @@
 	    __uint32_t pad2; /* may as well make it 64 bits */
 	} magic = { XLOG_UNMOUNT_TYPE, 0, 0 };
 
-#if defined(DEBUG) || defined(XLOG_NOLOG)
-	if (!xlog_debug && xlog_target == log->l_targ)
-		return 0;
-#endif
-
 	/*
 	 * Don't write out unmount record on read-only mounts.
 	 * Or, if we are doing a forced umount (typically because of IO errors).
@@ -711,12 +645,6 @@
 	int	error;
 	xlog_t *log = mp->m_log;
 
-#if defined(DEBUG) || defined(XLOG_NOLOG)
-	if (!xlog_debug && xlog_target == log->l_targ) {
-		*start_lsn = 0;
-		return 0;
-	}
-#endif
 	if (XLOG_FORCED_SHUTDOWN(log))
 		return XFS_ERROR(EIO);
 
@@ -736,11 +664,6 @@
 	int		need_bytes, free_bytes, cycle, bytes;
 	SPLDECL(s);
 
-#if defined(DEBUG) || defined(XLOG_NOLOG)
-	if (!xlog_debug && xlog_target == log->l_targ)
-		return;
-#endif
-	/* XXXsup tmp */
 	if (XLOG_FORCED_SHUTDOWN(log))
 		return;
 	ASSERT(!XFS_FORCED_SHUTDOWN(mp));
@@ -1027,51 +950,22 @@
 	int size;
 	int xhdrs;
 
-#if defined(DEBUG) || defined(XLOG_NOLOG)
-	/*
-	 * When logbufs == 0, someone has disabled the log from the FSTAB
-	 * file.  This is not a documented feature.  We need to set xlog_debug
-	 * to zero (this deactivates the log) and set xlog_target to the
-	 * appropriate device.  Only one filesystem may be affected as such
-	 * since this is just a performance hack to test what we might be able
-	 * to get if the log were not present.
-	 */
-	if (mp->m_logbufs == 0) {
-		xlog_debug = 0;
-		xlog_target = log->l_targ;
-		log->l_iclog_bufs = XLOG_MIN_ICLOGS;
-	} else
-#endif
-	{
-		/*
-		 * This is the normal path.  If m_logbufs == -1, then the
-		 * admin has chosen to use the system defaults for logbuffers.
-		 */
-		if (mp->m_logbufs == -1) { 
-			if (xfs_physmem <= btoc(128*1024*1024)) { 
-				log->l_iclog_bufs = XLOG_MIN_ICLOGS; 
-			} else if (xfs_physmem <= btoc(400*1024*1024)) { 
-				log->l_iclog_bufs = XLOG_MED_ICLOGS; 
-			} else {
-				/* 256K with 32K bufs */
-				log->l_iclog_bufs = XLOG_MAX_ICLOGS;
-			}
-		} else
-			log->l_iclog_bufs = mp->m_logbufs;
-
-#if defined(DEBUG) || defined(XLOG_NOLOG)
-		/* We are reactivating a filesystem after it was inactive */
-		if (log->l_targ == xlog_target) {
-			xlog_target = NULL;
-			xlog_debug = 1;
+	if (mp->m_logbufs <= 0) {
+		if (xfs_physmem <= btoc(128*1024*1024)) {
+			log->l_iclog_bufs = XLOG_MIN_ICLOGS;
+		} else if (xfs_physmem <= btoc(400*1024*1024)) {
+			log->l_iclog_bufs = XLOG_MED_ICLOGS;
+		} else {	/* 256K with 32K bufs */
+			log->l_iclog_bufs = XLOG_MAX_ICLOGS;
 		}
-#endif
+	} else {
+		log->l_iclog_bufs = mp->m_logbufs;
 	}
 
 	/*
 	 * Buffer size passed in from mount system call.
 	 */
-	if (mp->m_logbsize != -1) {
+	if (mp->m_logbsize > 0) {
 		size = log->l_iclog_size = mp->m_logbsize;
 		log->l_iclog_size_log = 0;
 		while (size != 1) {
@@ -1094,7 +988,7 @@
 			log->l_iclog_hsize = BBSIZE;
 			log->l_iclog_heads = 1;
 		}
-		return;
+		goto done;
 	}
 
 	/*
@@ -1121,7 +1015,7 @@
 	if (mp->m_sb.sb_blocksize >= 16*1024) {
 		log->l_iclog_size = XLOG_BIG_RECORD_BSIZE;
 		log->l_iclog_size_log = XLOG_BIG_RECORD_BSHIFT;
-		if (mp->m_logbufs == -1) {
+		if (mp->m_logbufs <= 0) {
 			switch (mp->m_sb.sb_blocksize) {
 			    case 16*1024:			/* 16 KB */
 				log->l_iclog_bufs = 3;
@@ -1138,6 +1032,12 @@
 			}
 		}
 	}
+
+done:	/* are we being asked to make the sizes selected above visible? */
+	if (mp->m_logbufs == 0)
+		mp->m_logbufs = log->l_iclog_bufs;
+	if (mp->m_logbsize == 0)
+		mp->m_logbsize = log->l_iclog_size;
 }	/* xlog_get_iclog_buffer_size */
 
 
@@ -3390,7 +3290,7 @@
  *
  ******************************************************************************
  */
-#if defined(DEBUG) && !defined(XLOG_NOLOG)
+#if defined(DEBUG)
 /*
  * Make sure that the destination ptr is within the valid data region of
  * one of the iclogs.  This uses backup pointers stored in a different
@@ -3554,7 +3454,7 @@
 		ptr += sizeof(xlog_op_header_t) + op_len;
 	}
 }	/* xlog_verify_iclog */
-#endif /* DEBUG && !XLOG_NOLOG */
+#endif
 
 /*
  * Mark all iclogs IOERROR. LOG_LOCK is held by the caller.
diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h
index 758e4eb..8f28514 100644
--- a/fs/xfs/xfs_log_priv.h
+++ b/fs/xfs/xfs_log_priv.h
@@ -492,6 +492,8 @@
 						 * alignment mask */
 } xlog_t;
 
+#define XLOG_FORCED_SHUTDOWN(log)	((log)->l_flags & XLOG_IO_ERROR)
+
 #define XLOG_GRANT_SUB_SPACE(log,bytes,type)	\
 	xlog_grant_sub_space(log,bytes,type)
 static inline void xlog_grant_sub_space(struct log *log, int bytes, int type)
diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
index de3abf8..279e043 100644
--- a/fs/xfs/xfs_trans.c
+++ b/fs/xfs/xfs_trans.c
@@ -176,12 +176,8 @@
 	XFS_LBC_INIT(&(ntp->t_busy));
 
 	ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
-
-#if defined(XLOG_NOLOG) || defined(DEBUG)
-	ASSERT(!xlog_debug || tp->t_ticket != NULL);
-#else
 	ASSERT(tp->t_ticket != NULL);
-#endif
+
 	ntp->t_flags = XFS_TRANS_PERM_LOG_RES | (tp->t_flags & XFS_TRANS_RESERVE);
 	ntp->t_ticket = tp->t_ticket;
 	ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used;
@@ -663,9 +659,6 @@
 	int			sync;
 #define	XFS_TRANS_LOGVEC_COUNT	16
 	xfs_log_iovec_t		log_vector_fast[XFS_TRANS_LOGVEC_COUNT];
-#if defined(XLOG_NOLOG) || defined(DEBUG)
-	static xfs_lsn_t	trans_lsn = 1;
-#endif
 	void			*commit_iclog;
 	int			shutdown;
 
@@ -716,11 +709,7 @@
 			*commit_lsn_p = commit_lsn;
 		return (shutdown);
 	}
-#if defined(XLOG_NOLOG) || defined(DEBUG)
-	ASSERT(!xlog_debug || tp->t_ticket != NULL);
-#else
 	ASSERT(tp->t_ticket != NULL);
-#endif
 
 	/*
 	 * If we need to update the superblock, then do it now.
@@ -737,14 +726,10 @@
 	 * by using a vector from the stack when it fits.
 	 */
 	nvec = xfs_trans_count_vecs(tp);
-
 	if (nvec == 0) {
 		xfs_force_shutdown(mp, XFS_LOG_IO_ERROR);
 		goto shut_us_down;
-	}
-
-
-	if (nvec <= XFS_TRANS_LOGVEC_COUNT) {
+	} else if (nvec <= XFS_TRANS_LOGVEC_COUNT) {
 		log_vector = log_vector_fast;
 	} else {
 		log_vector = (xfs_log_iovec_t *)kmem_alloc(nvec *
@@ -758,30 +743,14 @@
 	 */
 	xfs_trans_fill_vecs(tp, log_vector);
 
-	/*
-	 * Ignore errors here. xfs_log_done would do the right thing.
-	 * We need to put the ticket, etc. away.
-	 */
-	error = xfs_log_write(mp, log_vector, nvec, tp->t_ticket,
-			     &(tp->t_lsn));
+	error = xfs_log_write(mp, log_vector, nvec, tp->t_ticket, &(tp->t_lsn));
 
-#if defined(XLOG_NOLOG) || defined(DEBUG)
-	if (xlog_debug) {
-		commit_lsn = xfs_log_done(mp, tp->t_ticket,
-					  &commit_iclog, log_flags);
-	} else {
-		commit_lsn = 0;
-		tp->t_lsn = trans_lsn++;
-	}
-#else
 	/*
-	 * This is the regular case.  At this point (after the call finishes),
-	 * the transaction is committed incore and could go out to disk at
-	 * any time.  However, all the items associated with the transaction
-	 * are still locked and pinned in memory.
+	 * The transaction is committed incore here, and can go out to disk
+	 * at any time after this call.  However, all the items associated
+	 * with the transaction are still locked and pinned in memory.
 	 */
 	commit_lsn = xfs_log_done(mp, tp->t_ticket, &commit_iclog, log_flags);
-#endif
 
 	tp->t_commit_lsn = commit_lsn;
 	if (nvec > XFS_TRANS_LOGVEC_COUNT) {
diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c
index dd419e1..94f0858 100644
--- a/fs/xfs/xfs_vfsops.c
+++ b/fs/xfs/xfs_vfsops.c
@@ -214,9 +214,7 @@
 	}
 
 	if (ap->logbufs != -1 &&
-#if defined(DEBUG) || defined(XLOG_NOLOG)
 	    ap->logbufs != 0 &&
-#endif
 	    (ap->logbufs < XLOG_MIN_ICLOGS ||
 	     ap->logbufs > XLOG_MAX_ICLOGS)) {
 		cmn_err(CE_WARN,
@@ -226,6 +224,7 @@
 	}
 	mp->m_logbufs = ap->logbufs;
 	if (ap->logbufsize != -1 &&
+	    ap->logbufsize !=  0 &&
 	    ap->logbufsize != 16 * 1024 &&
 	    ap->logbufsize != 32 * 1024 &&
 	    ap->logbufsize != 64 * 1024 &&
@@ -1910,13 +1909,14 @@
 		seq_printf(m, "," MNTOPT_IHASHSIZE "=%d", mp->m_ihsize);
 
 	if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
-		seq_printf(m, "," MNTOPT_ALLOCSIZE "=%d", 1<<mp->m_writeio_log);
+		seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
+				(int)(1 << mp->m_writeio_log) >> 10);
 
 	if (mp->m_logbufs > 0)
 		seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
 
 	if (mp->m_logbsize > 0)
-		seq_printf(m, "," MNTOPT_LOGBSIZE "=%d", mp->m_logbsize);
+		seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
 
 	if (mp->m_logname)
 		seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);