Messages in this thread | | | Date | Thu, 9 Jan 2014 00:23:22 +0100 | From | Andi Kleen <> | Subject | Re: [PATCH] lockdep: increase static allocations |
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On Wed, Jan 08, 2014 at 03:10:55PM -0500, Sasha Levin wrote: > On 01/08/2014 02:51 PM, Andi Kleen wrote: > >Sasha Levin <sasha.levin@oracle.com> writes: > > > >>Fuzzing a recent kernel with a large configuration hits the static > >>allocation limits and disables lockdep. > > > >Doesn't that use a lot more memory? I thought lockdep preallocates. > > > >Doubling may be too aggressive. > > The patch adds about 4MB of memory usage, I didn't think it's too much for something > that is only enabled during debugging.
Wasting 4MB is an issue.
Linus' first Linux system had less total memory than that.
> > If this is an issue, can I suggest making these values configurable in the .config > and just let users pick whatever they want?
Better allocate it at boot time, using a boot parameter or somesuch.
-Andi
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