PR/46890 CVS commit: src/sys/arch/mips/mips

["Nick Hudson" <skrll%netbsd.org@localhost>]

The following reply was made to PR port-cobalt/46890; it has been noted by 
GNATS.

From: "Nick Hudson" <skrll%netbsd.org@localhost>
To: gnats-bugs%gnats.NetBSD.org@localhost
Cc: 
Subject: PR/46890 CVS commit: src/sys/arch/mips/mips
Date: Wed, 23 Apr 2014 20:57:16 +0000

 Module Name:   src
 Committed By:  skrll
 Date:          Wed Apr 23 20:57:15 UTC 2014
 
 Modified Files:
        src/sys/arch/mips/mips: pmap.c vm_machdep.c
 
 Log Message:
 Fix a logic inversion introduced with the matt-nb5-mips64 for
 pmap_{zero,copy}_page cache alias handing. The check previously used
 PG_MD_UNCACHED_P, where it now uses PG_MD_CACHED_P, when considering if
 a cache invalidation is required.
 
 Additionally flush the cache for the uarea va to avoid potential (future)
 cache aliases in cpu_uarea_free when handing pages back to uvm for later
 use.
 
 ok matt@
 
 Hopefully this addresses the instability reported in the following PRs:
 
 PR/44900 - R5000/Rm5200 mips ports are broken
 PR/46170 - NetBSD/cobalt 6.0_BETA does not boot
 PR/46890 - upcoming NetBSD 6.0 release is very unstable / unusable on cobalt 
qube 2
 PR/48628 - cobalt and hpcmips ports are dead
 
 
 To generate a diff of this commit:
 cvs rdiff -u -r1.209 -r1.210 src/sys/arch/mips/mips/pmap.c
 cvs rdiff -u -r1.142 -r1.143 src/sys/arch/mips/mips/vm_machdep.c
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.