Zygo Blaxell aa74a238b3 hash: remove preloaded toxic hash blacklist ...

Faster and more reliable toxic extent detection means we can now be much
less paranoid about creating toxic extents.

The paranoia has significant impact on dedupe hit rates because every
extent that contains even one toxic hash is abandoned.  The preloaded
toxic hashes were chosen because they occur more frequently than any
other block contents in typical filesystem data.  The combination of these
resulted in as much as 30% of duplicate extents being left untouched.

Remove the preloaded toxic extent blacklist, and rely on the new
kernel-CPU-usage-based workaround instead.

Signed-off-by: Zygo Blaxell <bees@furryterror.org>

2018-10-31 23:03:01 -04:00

22 KiB

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