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"Error -3 while decompressing!" while use cramfs as rootfs

To: linux-mips <linux-mips@linux-mips.org>
Subject: "Error -3 while decompressing!" while use cramfs as rootfs
From: zhuzhenhua <zzh.hust@gmail.com>
Date: Fri, 7 Jul 2006 13:12:23 +0800
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i have write a rootfs.cramfs to mtdblock2, and if i use nfsroot, and
can mount /dev/mtdblock2 correctly.but if i use /dev/mtdblock2 as
rootfs with bootargs
"root/dev/mtdblock2 rootfstype=cramfs"
the kernel output next messages
....
VFS: Mounted root (cramfs filesystem) readonly.
Freeing unused kernel memory: 144k freed
Error -3 while decompressing!
805bf6a8(-2046512)->81218000(4096)
Error -3 while decompressing!
803cc4fc(26)->8121e000(4096)
Error -3 while decompressing!
803cc516(26)->8121f000(4096)
Error -3 while decompressing!
803cc530(26)->803a0000(4096)
....

my kernel version is 2.6.14, flash is SST39VF3201, nor flash, 4M Byte

does anyone have idea about this situation?

thanks for any hints

Best Regards

zhuzhenhua

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