Em Fri, Jan 30, 2015 at 12:16:11PM -0800, Sukadev Bhattiprolu escreveu: > Arnaldo Carvalho de Melo [[email protected]] wrote: > | Em Thu, Jan 29, 2015 at 03:55:22PM -0800, Sukadev Bhattiprolu escreveu: > | > Should there be another check to before reading the mmap again ? > | > | Possibly, checking, but a similar algorithm should be in place for > | 'record', do you see any problems there? I.e. with 'perf record sleep > | 1'? > > No, I don't see the failure with perf record in several hundred attempts. > (both the distro and latest perf-core versions work ok).
Ok, so its a matter of comparing what both are doing, will try. > | > I must add that I don't get the SIGSEGV on recent perf-core and the > | > system where we get the crash, first runs into the following > | > errors that we are still looking into (maybe related to "ppc64le" > | > architecture). > > With recent perf core I did not get the SIGSEGV (or the syscall translation > failures below) on a different system. > > But on this system, a power KVM guest, I get both errors even with latest > perf core (commit c52686f9f88). > > | > > | > Problems reading syscall 45 information > | > Problems reading syscall 5 information > | > Problems reading syscall 5 information > | > Problems reading syscall 108 information > | > Problems reading syscall 108 information > | > Problems reading syscall 90 information > | > Problems reading syscall 90 information > | > Problems reading syscall 6 information > | > > | > Unlike the SIGSEGV, these errors occur always. > > Most likely this syscall number translation is due to the > > https://fedorahosted.org/audit/browser/trunk/lib/machinetab.h > > missing this change set 1013, which added support for ppc64le. We have to improve that message to mention that perhaps a newer audit-libs package is required. - Arnaldo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
