On Tue, Jan 25, 2011 at 12:26 AM, David Daney <ddaney@xxxxxxxxxxxxxxxxxx> wrote: > 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. >> >> > > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > Why should the application or the toolchains depend on pagesize? I am not very clear on this. Can someone explain it? Regards, Himanshu _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
