On 6 January 2012 12:37, Rengert, Mark <mreng...@redcom.com> wrote: > I am using scratchbox2 under Ubuntu 10.04 to build postgresql for ppc. About > half the time > the configuration test for thread safety fails with a qemu-ppc coredump. It > fails less often > when QEMU_STRACE is defined but it still fails sometimes. It appears to > happen in the > pthread_join() call, I think. > > Here is the info requested on the KVM bug report webpage > (http://www.linux-kvm.org/page/Bugs): > > CPU model: Intel(R) Core(TM) i5-2400 CPU @ 3.10GHz > > Host kernel: Linux florida 2.6.32-36-generic-pae #79-Ubuntu SMP Tue Nov 8 > 23:25:26 UTC 2011 i686 GNU/Linux > > Guest: via "sb2 -t powerpc-unknown-linux-gnu" > > Qemu command: (generated by scratchbox) "/usr/bin/qemu-ppc -U LD_PRELOAD -L / > -0 ./conftest ./conftest"
> Scratchbox2 version: 2.0-lta101 > Qemu version: qemu-ppc version 0.12.3 (qemu-kvm-0.12.3), Copyright (c) > 2003-2008 Fabrice Bellard > Ubuntu package: qemu-kvm-extras 0.12.3+noroms-0ubuntu9.16 (latest version > available for Ubuntu 10.04) Two things: (1) this is a known bug, qemu has some race conditions which are exposed by running heavily multithreaded code in user-mode, and which can cause crashes/hangs/other problems. (2) 0.12.3 is a really old version. As it happens I know we haven't fixed this bug yet, but in most other cases we'd just ask you to retry with a newer QEMU version. -- PMM
