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bcache: Don't touch bucket gen for dirty ptrs
authorKent Overstreet <kmo@daterainc.com>
Sat, 10 Aug 2013 04:14:13 +0000 (21:14 -0700)
committerKent Overstreet <kmo@daterainc.com>
Wed, 8 Jan 2014 21:05:07 +0000 (13:05 -0800)
Unnecessary since a bucket that has dirty pointers pointing to it can
never be invalidated - and skipping it is a measurable performance
boost, since the bucket gen will usually be a cache miss.

Signed-off-by: Kent Overstreet <kmo@daterainc.com>

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