e2fsck?
In the restricted version (CONFIG_EXT2_IND_BITMAP not defined),
there is no problem because the indirect bitmap is not used. In the
"full" version (i.e. with CONFIG_EXT2_IND_BITMAP defined), you
absolutely must use the patched version of e2fsck.
The rule is the following: if you run a kernel that has been compiled
with CONFIG_EXT2_IND_BITMAP enabled and if you have used
`chattr +c' at least once with such a kernel, on a file larger than
16 clusters, then you must used the modified version of e2fsck
and never use again the original version (unless you first decompress
all files larger than 16 clusters; see section Can I still use a defragmenter?).
If you run a kernel compiled without CONFIG_EXT2_IND_BITMAP
enabled, or compiled with CONFIG_EXT2_IND_BITMAP but you have
never used `chattr +c' on a large file, then you can use either the
original version of e2fsck either the patched one, at your will.
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