Re: [Qemu-devel] [PATCH] memory: add -dont-dump-guest option to reduce core dump size

[Jason Baron]

On Fri, May 04, 2012 at 05:23:51PM -0400, Jason Baron wrote:
> Add a command line parameter to not dump guest memory in the core dump, the
> command line is: -dont-dump-guest. This brought the core dump down from
> 383MB to 13 MB on a 1GB guest.
> 
> Signed-off-by: Jason Baron <address@hidden>
> ---
>  exec.c          |   13 +++++++++++++
>  osdep.h         |    7 +++++++
>  qemu-options.hx |    5 +++++
>  sysemu.h        |    1 +
>  vl.c            |    4 ++++
>  5 files changed, 30 insertions(+), 0 deletions(-)
> 

Any thoughts on this? Is the guest memory often helpful in debugging
when the qemu process segfaults?

This feature also seems useful if somebody is running a sensitive
workload, such that the non-sensitive qemu state can be dumped
independently of the guest state. In that case, perhaps there should
also be an option that allows the guest to be dumped on a segfault, now
separately?

Thanks,

-Jason