CVS commit: [nathanw_sa] syssrc/sys/arch/arm/arm32

[Jason R Thorpe <thorpej%netbsd.org@localhost>]

Module Name:    syssrc
Committed By:   thorpej
Date:           Tue Aug 13 04:17:37 UTC 2002

Modified Files:
        syssrc/sys/arch/arm/arm32 [nathanw_sa]: pmap.c

Log Message:
>From trunk:

Add the brutal hack that allows us to limp along using the read/write
cache line allocation policy on XScale CPUs: in pmap_enter(), if the
pmap is the kernel pmap, clear the X-bit in the PTE, thus disabling
read/write-allocate for managed kernel mappings.

Yes, this is ugly.  But it makes userland code run with r/w-allocate,
which is a huge improvement on systems with low core memory performance.


To generate a diff of this commit:
cvs rdiff -r1.30.2.11 -r1.30.2.12 syssrc/sys/arch/arm/arm32/pmap.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.