On Mon, Aug 18, 2003 at 03:12:29PM +0100, Alasdair G Kergon wrote: > On Mon, Aug 18, 2003 at 01:14:15AM +0200, Jan Niehusmann wrote: > > I noticed the WCHAN fields in my ps output were not very useful, because > > they pointed to a module and were not decoded. > > Does your System.map file correspond to the running kernel? > [See ps man page / strace to check where it's getting that file from] Sure it is :-) (I use debian make-kpkg to build a kernel .deb, which makes sure that the right System.map file gets installed together with the kernel) But it doesn't contain symbols which get defined by modules. And even /proc/ksymoops only contains exported symbols, which daemon() from dm-daemon.c is not. So I looked at the next exported symbol (dm_daemon_start), took the difference between these two addresses, and went back the number of bytes in objdump --disassemble, and compared that to the sourcecode to find the actual positions. Even though I don't know x86 assembly too well, it was not difficult to match assembly instructions to C source code, as the source at this position is quite low-level. Jan _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
