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README: document impact of 7f8e406 ("btrfs: improve delayed refs iterations")

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Zygo Blaxell 2016-12-06 00:27:05 -05:00
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@ -233,6 +233,11 @@ Fixed bugs:
* 4.7: *slow backref* bug no longer triggers a softlockup panic. It still
too long to resolve a block address to a root/inode/offset triple.
Fixed bugs not yet integrated in mainline Linux:
* 7f8e406 ("btrfs: improve delayed refs iterations"): reduces the cost
of LOGICAL_INO ioctl from 30-70% of bees running time to under 5%.
Unfixed kernel bugs (as of 4.5.7) with workarounds in Bees:
* *slow backref*: If the number of references to a single shared extent