On Mon, Nov 26, 2007 at 11:41:38AM +0530, vijay baskar wrote: > Hi friends, > > Kernel virtual space is divided into 3 different zones namely ZONE_DMA, > ZONE_NORMAL, ZONE_HIGHMEM.Remember that the kernel follows the 3GB/1GB > split ie 3 GB for user space and 1 GB for kernel space. Since your ram > is 1 GB, 896 MB will be mapped one to one with the kernel virtual space. > This one to one mapping will be done in the ZONE_NORMAL and ZONE_DMA of > kernel virtual space.Remaining 128 MB of kernel virtual address space > will be used for setting up kernel data structures and for ioremaps and > vmallocs that the kernel will need to perform during boot up. If u > configure high memory this 128 MB will be used for accessing unmapped > memory regions in the ram and there wont be sufficient virtual > addresses for ioremaps and vmallocs. Thats why your kernel did not boot > when high mem is configured.
1. The split is 768/256 on powerpc, not 896/128. 2. Why do you think this is insufficient? > Since u want to have 1 GB of ram an alternative to > this is that u can try 2 GB/ 2 GB split which is configurable ie 2 GB > for user space and 2 GB for kernel space in your kernel. 1. He said he wanted 2GB of RAM, not 1. 2. I don't think this mode of operation has been tested very well on powerpc. > >=> bootm fed00000 fe900000 > > > >## Booting image at fed00000 ... > > > > Image Name: Linux-2.6.11 > > > > Image Type: PowerPC Linux Kernel Image (gzip compressed) > > > > Data Size: 1054435 Bytes = 1 MB > > > > Load Address: 00000000 > > > > Entry Point: 00000000 > > > > Verifying Checksum ... OK > > > > Uncompressing Kernel Image ... OK > > > >## Loading RAMDisk Image at fe900000 ... > > > > Image Name: uboot ext2 ramdisk rootfs > > > > Image Type: PowerPC Linux RAMDisk Image (gzip compressed) > > > > Data Size: 3195657 Bytes = 3 MB > > > > Load Address: 00000000 > > > > Entry Point: 00000000 > > > > Verifying Checksum ... OK > > > > Loading Ramdisk to 0fc9a000, end 0ffa6309 ... OK Could you try with a more recent, arch/powerpc kernel? -Scott _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
