linux/arch/powerpc
Benjamin Herrenschmidt f6ab0b922c [POWERPC] powerpc: Fix demotion of segments to 4K pages
When demoting a process to use 4K HW pages (instead of 64K), which
happens under various circumstances such as doing cache inhibited
mappings on machines that do not support 64K CI pages, the assembly
hash code calls back into the C function flush_hash_page().  This
function prototype was recently changed to accomodate for 1T segments
but the assembly call site was not updated, causing applications that
do demotion to hang.  In addition, when updating the per-CPU PACA for
the new sizes, we didn't properly update the slice "map", thus causing
the SLB miss code to re-insert segments for the wrong size.

This fixes both and adds a warning comment next to the C
implementation to try to avoid problems next time someone changes it.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-10-29 14:34:14 +11:00
..
boot Merge branch 'for-2.6.24' of master.kernel.org:/pub/scm/linux/kernel/git/jwboyer/powerpc-4xx into merge 2007-10-23 22:20:51 +10:00
configs Merge branch 'for-2.6.24' of master.kernel.org:/pub/scm/linux/kernel/git/jwboyer/powerpc-4xx into merge 2007-10-23 22:20:51 +10:00
kernel Update arch/ to use sg helpers 2007-10-22 21:19:59 +02:00
lib [POWERPC] rheap: Changes config mechanism 2007-10-16 17:09:21 -06:00
math-emu [POWERPC] Fix handling of stfiwx math emulation 2007-10-16 09:05:24 -05:00
mm [POWERPC] powerpc: Fix demotion of segments to 4K pages 2007-10-29 14:34:14 +11:00
oprofile Combine instrumentation menus in kernel/Kconfig.instrumentation 2007-10-19 11:53:54 -07:00
platforms Merge branch 'for-2.6.24' of master.kernel.org:/pub/scm/linux/kernel/git/jwboyer/powerpc-4xx into merge 2007-10-23 22:20:51 +10:00
sysdev [POWERPC] bestcomm: Restrict bus prefetch bugfix to original mpc5200 silicon. 2007-10-21 10:52:02 -06:00
xmon [POWERPC] fix showing xmon help 2007-07-22 21:30:58 +10:00
.gitignore [POWERPC] Add files build to .gitignore 2006-12-04 20:41:29 +11:00
Kconfig Combine instrumentation menus in kernel/Kconfig.instrumentation 2007-10-19 11:53:54 -07:00
Kconfig.debug [POWERPC] 4xx: Split early debug output and early boot console for 44x 2007-10-19 16:18:18 -05:00
Makefile kbuild: enable 'make CPPFLAGS=...' to add additional options to CPP 2007-10-15 22:17:25 +02:00