No clean _or_ dirty blocks to GC from!
ldoolitt at recycle.lbl.gov
Thu Oct 4 12:35:33 EDT 2001
This is really strange. I go through the following steps:
0. Run linux-2.4.9-ac10-rmk2-np1 with latest CVS MTD/JFFS2 on a
StrongARM with Intel 28F320B3B Flash. /dev/mtd2 is a 1M partition.
1. eraseall /dev/mtd2
(works, I can verify all 1's in the 16 64K blocks)
2. cp image /dev/mtd2
(image created with mkfs.jffs2. Seems to work)
3. mount -t jffs2 /dev/mtdblock2 /mnt/test
jffs2: No clean _or_ dirty blocks to GC from! Where are they all?
jffs2: Couldn't find erase block to garbage collect!
The files are there.
4. umount /mnt/test
5. check the blocks -- the 15 blocks that were all 1's before
all now have at the beginning:
begin 644 foo
$ hexdump foo
0000000 1985 2003 000c 0000 b0b1 e41e ffff ffff
0000010 ffff ffff ffff ffff ffff ffff ffff ffff
Wild guess, after reading jffs2.h: these are "clean" markers.
magic is 0x1985 == JFFS2_MAGIC_BITMASK,
nodetype is 0x2003 == JFFS2_NODETYPE_CLEANMARKER,
totlen is 12,
hdr_crc is 0xe41eb0b1.
So everything is fine, why the complaint? And if I mount again,
I get the same nasty message as before.
Clearly, I'm still a novice at JFFS2.
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