[Crash-utility] memory requirement for crash tool

[Dave Anderson]

----- "Dave Anderson" <anderson at redhat.com> wrote:

> ----- "Dharmosoth Seetharam" <seetharam_21 at yahoo.com> wrote:
> 
> > Hi,
> > 
> > I have a question regarding the memory requirement for crash tool
> > to start analyzing or extract few command's results from the
> > kernel core of size more than 50G.
> > 
> > my system details
> > arch : x86_64
> > memory: 128M
> > 
> > But I want to analyze kernel core of size 50G+.
> > 
> > Now I am unable to do that.
> > 
> > Can you please tell me how much memory it needs to get atleast "bt"
> > information?
> 
> No I can't -- I have no idea.  128MB is pretty pitiful.  But with
> enough swap I would guess that the crash session will come up eventually?
> You might try adding "--active" to the command line, which will
> only gather task data for the active task on each cpu.

Or try the "--minimal" command line option.  You won't have the "bt"
command available, but the "log" command is -- and with that you can
at least see the kernel-generated backtrace in the log buffer output.

The --minimal mode commands are: log, dis, rd, sym and eval)


Dave