Re: Setting bs could lead to some double free or segfault

On Fri, Jul 20 2007, Erwan Velu wrote:
> Erwan Velu wrote:
>> Jens Axboe wrote:
>>> [...]
>>> It works here, can you generate the core dump like described yesterday
>>> and show in gdb where it traps?
>>>
> Please forget my previous mail... something was wrong on my system..
> Now you procedure works perfectly,
>
> [root_at_max1 ~]# gdb /home/build/rpm/BUILD/fio/fio core.3316
> GNU gdb 6.3-5mdk (Mandriva Linux release 2006.0)
> Copyright 2004 Free Software Foundation, Inc.
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> are
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> There is absolutely no warranty for GDB. Type "show warranty" for details.
> This GDB was configured as "x86_64-mandriva-linux-gnu"...Using host
> libthread_db library "/lib64/tls/libthread_db.so.1".
>
> Core was generated by `fio /home/build/rpm/BUILD/fio/fio asimplejob.fio'.
> Program terminated with signal 8, Arithmetic exception.
> #0 0x000000000040dd89 in add_stat_sample (is=0x6f69662e,
> data=7308332184076772724) at stat.c:610
> 610 is->S += delta * (val - is->mean);
> (gdb) bt
> #0 0x000000000040dd89 in add_stat_sample (is=0x6f69662e,
> data=7308332184076772724) at stat.c:610
> #1 0x0000000000000004 in ?? ()
> #2 0x000000000052c450 in options ()
> #3 0x0000000000000000 in ?? ()
> (gdb)

Hmm, doesn't make a lot of sense. Please remove the -O2 from your
makefile, make clean, make, and reproduce and do the above procedure
again!

-- 
Jens Axboe