Messages in this thread | | | Date | Mon, 2 Nov 2015 10:48:17 -0600 (CST) | From | Christoph Lameter <> | Subject | Re: [PATCH v6 2/3] percpu: add PERCPU_ATOM_SIZE for a generic percpu area setup |
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On Mon, 2 Nov 2015, Catalin Marinas wrote:
> I haven't looked at the patch 3/3 in detail but I'm pretty sure I'll NAK > the approach (and the definition of PERCPU_ATOM_SIZE), therefore > rendering this patch unnecessary. IIUC, this is used to enforce some > alignment of the per-CPU IRQ stack to be able to check whether the > current stack is process or IRQ on exception entry. But there are other, > less intrusive ways to achieve the same (e.g. x86).
The percpu allocator allows the specification of alignment requirements.
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