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authorWu Zhangjin <wuzhangjin@gmail.com>2009-12-01 14:55:25 +0800
committerRalf Baechle <ralf@linux-mips.org>2009-12-01 16:21:26 +0000
commit315fe625f878749a7d2b6b65a40c29bbbe6e1dc7 (patch)
treef3bf789a101752e9075c8d21623cd07ef5c76f48
parente1eb3a983befdb422e1aae299bdab573d04929f6 (diff)
MIPS: Loongson: Disallow 4kB pages
Currently, with PAGE_SIZE_4KB, the kernel for loongson will hang on: Kernel panic - not syncing: Attempted to kill init! The possible reason is the cache aliases problem: Loongson 2F has 64kb, 4 way L1 Cache, the way size is 16kb, which is bigger then 4kb. so, If using 4kb page size, there is cache aliases problem. To avoid this kind of problem, extra cache flushing. The 2nd possible solution is 16kb page size which avoids cache aliases without the need for extra cache flushes. So we disable 4kB pages until the aliasing issue is solved. Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Patchwork: http://patchwork.linux-mips.org/patch/736/ Cc: linux-mips@linux-mips.org Cc: zhangfx@lemote.com Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
-rw-r--r--arch/mips/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index ffdd651c54b..e232e50e6a0 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1453,6 +1453,7 @@ choice
config PAGE_SIZE_4KB
bool "4kB"
+ depends on !CPU_LOONGSON2
help
This option select the standard 4kB Linux page size. On some
R3000-family processors this is the only available page size. Using