The following reply was made to PR kern/36019; it has been noted by GNATS.

From: Izumi Tsutsui <tsutsui@ceres.dti.ne.jp>
To: gnats-bugs@NetBSD.org
Cc: yamt@NetBSD.org, kern-bug-people@NetBSD.org,
	netbsd-bugs@NetBSD.org, gnats-admin@NetBSD.org, yamt@NetBSD.org,
	tsutsui@ceres.dti.ne.jp
Subject: Re: kern/36019 (uvm_readahead.c:ra_startio() assumes (MAXPHYS & (MAXPHYS
	 - 1)) == 0)
Date: Thu, 10 May 2007 08:34:16 +0900

 yamt@NetBSD.org wrote:
 
 > Synopsis: uvm_readahead.c:ra_startio() assumes (MAXPHYS & (MAXPHYS - 1)) == 0
  :
 > Responsible-Changed-Why:
 > mine.
 
 Is it okay to commit this as temporary workaround (for 4.0)?
 ---
 Index: uvm_readahead.c
 ===================================================================
 RCS file: /cvsroot/src/sys/uvm/uvm_readahead.c,v
 retrieving revision 1.3
 diff -u -r1.3 uvm_readahead.c
 --- uvm_readahead.c	12 Mar 2007 18:18:39 -0000	1.3
 +++ uvm_readahead.c	9 May 2007 23:24:23 -0000
 @@ -66,6 +66,12 @@
  	off_t ra_next;		/* next offset to read-ahead */
  };
  
 +#if defined(sun2) || (defined(sun3) && defined(_SUN3_))
 +/* XXX: on sun2 and sun3 (but not sun3x) MAXPHYS is 0xe000 */
 +#undef MAXPHYS	
 +#define MAXPHYS		0x8000	/* XXX */
 +#endif
 +
  #define	RA_WINSIZE_INIT	MAXPHYS			/* initial window size */
  #define	RA_WINSIZE_MAX	(MAXPHYS * 8)		/* max window size */
  #define	RA_WINSIZE_SEQENTIAL	RA_WINSIZE_MAX	/* fixed window size used for
 
 ---
 Izumi Tsutsui