On 01/24/2011 07:02 AM, naveen yadav wrote:
Hi All,
we are using mips32r2 so I want to know which all pages size it can support?
When I modify arch/mips/Kconfig. it boot sucessfully on 16KB page
size. but hang/not boot crash when change page size to 8KB,32KB and 64
KB.
I don't think 8KB and 32KB work on most mips32r2 processors. You would
have to check the processor manual to be sure.
We are using 2.6.30 kernel.
At Page Size 8KB and 32KB it hang in unpack_to_rootfs() function of
init/initramfs.c
64KB it hangs when execute init Kernel panic - not syncing: Attempted
to kill init!
I regularly run 4K, 16K, and 64K page sizes with a Debian rootfs. If
you run with a broken uClibc toolchain that doesn't support larger
pages, it will of course fail. In this case the problem is with your
toolchain, not the kernel.
David Daney
config PAGE_SIZE_4KB
bool "4kB"
help
This option select the standard 4kB Linux page size. On some
R3000-family processors this is the only available page size. Using
4kB page size will minimize memory consumption and is therefore
recommended for low memory systems.
config PAGE_SIZE_8KB
bool "8kB"
depends on (EXPERIMENTAL&& CPU_R8000) || CPU_CAVIUM_OCTEON
help
Using 8kB page size will result in higher performance kernel at
the price of higher memory consumption. This option is available
only on R8000 and cnMIPS processors. Note that you will need a
suitable Linux distribution to support this.
config PAGE_SIZE_16KB
bool "16kB"
depends on !CPU_R3000&& !CPU_TX39XX
help
Using 16kB page size will result in higher performance kernel at
the price of higher memory consumption. This option is available on
all non-R3000 family processors. Note that you will need a suitable
Linux distribution to support this.
config PAGE_SIZE_32KB
bool "32kB"
help
Using 32kB page size will result in higher performance kernel at
the price of higher memory consumption. This option is available
only on cnMIPS cores. Note that you will need a suitable Linux
distribution to support this.
config PAGE_SIZE_64KB
bool "64kB"
depends on EXPERIMENTAL&& !CPU_R3000&& !CPU_TX39XX
help
Using 64kB page size will result in higher performance kernel at
the price of higher memory consumption. This option is available on
all non-R3000 family processor. Not that at the time of this
writing this option is still high experimental.
