NPTL Thread lockup issue on ARMv7
Ricard Wanderlof
ricard.wanderlof at axis.com
Wed Feb 2 08:10:01 UTC 2011
On Tue, 1 Feb 2011, Rich Felker wrote:
> A better fix would probably be to create a global lock on the atomic
> compare and exchange function so that only one thread can execute a
> compare and exchange at a time. This would impact performance rather
> badly, but that's better than having subtle race condition bugs that
> occur randomly once in 5 years of execution...
I think many people would argue that given the stability of given a
system as a whole, a random crash once per 5 years would be prefereble to
a severe performance penelty which impacts the system on a continuous
basis.
/Ricard
--
Ricard Wolf Wanderlöf ricardw(at)axis.com
Axis Communications AB, Lund, Sweden www.axis.com
Phone +46 46 272 2016 Fax +46 46 13 61 30
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