[PATCH] Add rd.memdebug in kdump module

[Dave Young]

On 11/20/13 at 01:09pm, WANG Chao wrote:
> On 11/19/13 at 03:26pm, Zhi Zou wrote:
> >     Description:
> >        Currently we only added memdebug code before different dracut
> >     hooks ie. pre-udev pre-pivot etc. Add memdebug in kdump.sh before
> >     capturing vmcore is also good for debugging.
> > 
> >     solution:
> >        Add make_trace_mem before saving vmcore.
> 
> How much will we benefit from this while we've already got a debug point
> at pre-pivot?

There's some gap between pre-pivot and actual dumping, there's might be
other memory consuming apps runs in this gap.

OTOH, it will be good for simply check the memdebug messages only at this point
for convinience.

> 
> Thanks
> Chao
> 
> > ---
> >  dracut-kdump.sh | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/dracut-kdump.sh b/dracut-kdump.sh
> > index f38891d..d157cd1 100755
> > --- a/dracut-kdump.sh
> > +++ b/dracut-kdump.sh
> > @@ -312,7 +312,7 @@ if [ $? -ne 0 ]; then
> >      echo "kdump: kdump_pre script exited with non-zero status!"
> >      do_final_action
> >  fi
> > -
> > +make_trace_mem "kdump saving vmcore" '1:shortmem' '2+:mem' '3+:slab'
> >  do_dump
> >  DUMP_RETVAL=$?
> >  
> > -- 
> > 1.8.3.1
> > 
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