Messages in this thread | | | Date | Mon, 16 Jul 2018 00:59:52 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH 1/7] mm: allocate mm_cpumask dynamically based on nr_cpu_ids |
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* Rik van Riel <riel@surriel.com> wrote:
> The mm_struct always contains a cpumask bitmap, regardless of > CONFIG_CPUMASK_OFFSTACK. That means the first step can be to > simplify things, and simply have one bitmask at the end of the > mm_struct for the mm_cpumask. > > This does necessitate moving everything else in mm_struct into > an anonymous sub-structure, which can be randomized when struct > randomization is enabled. > > The second step is to determine the correct size for the > mm_struct slab object from the size of the mm_struct > (excluding the cpu bitmap) and the size the cpumask. > > For init_mm we can simply allocate the maximum size this > kernel is compiled for, since we only have one init_mm > in the system, anyway. > > Pointer magic by Mike Galbraith, to evade -Wstringop-overflow > getting confused by the dynamically sized array. > > Signed-off-by: Rik van Riel <riel@surriel.com> > Signed-off-by: Mike Galbraith <efault@gmx.de>
Is this an Acked-by in disguise, or did this patch route via Mike?
Thanks,
Ingo
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