Hello Michael, mcheck is known to be unusable for quite some time with multi-threaded applications: https://sourceware.org/bugzilla/show_bug.cgi?id=9939 Until yesterday (including many hours of bug-hunting) this fact was not known to me, thus, I would like to suggest to add a note in the mcheck(3) manual page (and probably in the GLIBC documentation as well). I think one sentence in the NOTES section should suffice. Thanks in advance! Best regards Tolga Dalman -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html