The short question is: I understand that the jffs2 filesystem must match what the kernel expects. Does anyone know which parameters I should be looking at in my kernel source to be certain I am creating a compatible jffs2? I suspect that a mismatch is my problem...
The long of it:
I have successfully loaded x-loader, u-boot, and various kernels onto our custom device but I'm having some issues loading the jffs2 filesystem with the kernel. I have to upload the rootfs.jffs2 via u-boot and gkermit (same as I do the kernel), instead of the "preferred" way of using MTD drivers from inside linux (because this device has no MMC or other way to boot linux). As the kernel boots, it spits out a slew of ECC errors:
Example message for 2.6.36-rc1 kernel:
[ 171.528106] UNCORRECTED_ERROR default
[ 171.532379] Correcting single bit ECC error at offset: 178, bit: 2
[ 171.570739] ECC UNCORRECTED_ERROR B
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Example messages for 2.6.29-omap1 kernel:
[ 21.668548] CLEANMARKER node found at 0x00ae0000 has totlen 0xc != normal 0x0
[ 23.471618] JFFS2 notice: (1) jffs2_build_xattr_subsystem: complete building xattr subsystem, 0 of xdatum (0 unchecked, 0 orphan) and 0 of xref (0 dead, 0 orphan) found.
[ 23.492156] VFS: Mounted root (jffs2 filesystem) on device 31:4.
[ 23.498474] Freeing init memory: 204K
[ 23.543090] Erase at 0x06f40000 failed immediately: errno -5
...
[ 34.726928] Erase at 0x01500000 failed immediately: errno -5
[ 34.741577] jffs2_flush_wbuf(): Write failed with -5
[ 34.746856] Write of 178 bytes at 0x00ae77d8 failed. returned -5, retlen 0
[ 34.753753] Not marking the space at 0x00ae77d8 as dirty because the flash driver returned retlen zero
...
[ 41.589691] Argh. No free space left for GC. nr_erasing_blocks is 0. nr_free_blocks is 0. (erasableempty: yes, erasingempty: yes, erasependingempty: yes)
[ 41.603576] Failed to allocate space for wbuf recovery. Data loss ensues.
[ 41.610443] Write of 178 bytes at 0x06f60794 failed. returned -5, retlen 0
[ 41.617370] Not marking the space at 0x06f60794 as dirty because the flash driver returned retlen zero
[ 41.627258] Unable to handle kernel NULL pointer dereference at virtual address 00000024
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FYI: Here is how I load the filesystem from u-boot:
mw.b 90000000 0 F980000 # blanking RAM, probably not needed
loadb 90000000 # kermit rootfs.jffs2
mtdparts default # fs is at 0x680000, length: 0xF980000
nand unlock fs
nandecc sw
nand erase fs
nand write.jffs2 90000000 fs AE7000 # AE7000 is the length rounded up to the nearest page 4096 (0x1000). Issue?
nand lock
