git bisect and perf

From: David Ahern
Date: Tue Jun 05 2012 - 11:29:10 EST


I am trying find out when (ie. which commit) the pebs feature actually started working on a westmere system and hitting a problem with git-bisect:

# git bisect start arch/x86/kernel/cpu/perf_event*

# git bisect bad v2.6.35

# git bisect good v2.6.38
Some good revs are not ancestor of the bad rev.
git bisect cannot work properly in this case.
Maybe you mistake good and bad revs?

Any ideas on why git bisect would not work?

David
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