Re: [PATCH] kmemcheck: don't track pages allocated with interruptsdisabled

[Andi Kleen]

> Maybe we can do the splitting when kmemcheck is enabled for the first
> time, either with the proc handler or at boot if kmemcheck=1 is passed
> on the command line. Both of these contexts should/can be
> !irqs_disabled(), I think.

You could always split at boot when the CONFIG is enabled. I assume the
CONFIG alone has already quite a lot of overhead and it will be only
on in debug kernels and adding some more TLB misses shouldn't be really
a problem. Using 2MB pages in kernel is merely  an optimization.

-Andi


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