Probably not the best fix, but http://download.pureftpd.org/misc/nptl-bugs/nptl-rdlock-mfence.diff … seems to make posix rwlocks rock solid on Linux + multi-core Opteron.
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Probably not the best fix, but http://download.pureftpd.org/misc/nptl-bugs/nptl-rdlock-mfence.diff … seems to make posix rwlocks rock solid on Linux + multi-core Opteron.