Re: [PATCH -v2] mm: SLAB Out-of-memory diagnostics

From: Rafael Aquini
Date: Wed Mar 07 2012 - 09:48:30 EST


On Tue, Mar 06, 2012 at 09:42:57PM -0800, David Rientjes wrote:
> On Wed, 7 Mar 2012, Cong Wang wrote:
>
> > > Following the example at mm/slub.c, add out-of-memory diagnostics to the
> > > SLAB allocator to help on debugging certain OOM conditions.
> > >
> > > An example print out looks like this:
> > >
> > > <snip page allocator out-of-memory message>
> > > SLAB: Unable to allocate memory on node 0 (gfp=0x11200)
> > > cache: bio-0, object size: 192, order: 0
> > > node0: slabs: 3/3, objs: 60/60, free: 0
> > >
> >
> > Nitpick:
> >
> > What about "node: 0" instead of "node0: " ?
> >
>
> Good catch, that format would match the output of the slub out-of-memory
> messages.
>

To be honest, I really don't see a big advantage on the nitpick, however, if we
want to accurately copycat the slub output here, I can insert a blank space
between the word and the digit, like the following:
"node #: ..."

Rafael
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