Re: the " 'official' point of view" expressed by kernelnewbies.orgregarding reiser4 inclusion

From: Edward Shishkin
Date: Tue Aug 08 2006 - 07:04:31 EST

Matthias Andree wrote:
[stripping Cc: list]

On Thu, 03 Aug 2006, Edward Shishkin wrote:

What kind of forward error correction would that be,

Actually we use checksums, not ECC. If checksum is wrong, then run
fsck - it will remove the whole disk cluster, that represent 64K of

Well, that's quite a difference...

Checksum is checked before unsafe decompression (when trying to
decompress incorrect data can lead to fatal things).

Is this sufficient? How about corruptions that lead to the same checksum
and can then confuse the decompressor?

It is a multiplication of two unlikely events: fs corruption
and 32-hash collision. Paranoid people can assign zlib-based
transform plugin: afaik everything is safe there.

Is the decompressor safe in that
it does not scribble over memory it has not allocated?


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