On 2011-06-23 15:56, lidong chen wrote: >>> is it safe to register another signal handler? >>> if somebody know the reason, please tell me. >>> >>> and is it worth to do this? >> > because the core dump file is too big, and the time of core dump is too long. > I do a test, for a guest which have 9.7G memory, the coredump file is > 9.7G, and the time of core dump is 1 minute. > > for the compute node in my system, there are a lot of cpu and memory > resource, but no disk. > > > total 4.5G > -rw------- 1 root root 9.7G Jun 23 21:31 core-qemu-kvm-24090-1308835893 > -rw------- 1 root root 3.9G Jun 23 21:34 core-qemu-kvm-24098-1308835996
ulimit -c allows you to restrict the core file size so that it fits on your ram disk. That will at least collect enough information to do a proper post-mortem backtrace in gdb, including register states. It also allows to inspect variables on the stacks and the heap. No need to add a singe line or code to qemu for this. Jan
signature.asc
Description: OpenPGP digital signature
