Messages in this thread | | | Date | Mon, 2 Nov 2015 10:10:23 -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 Sun, 1 Nov 2015, Jungseok Lee wrote:
> There is no room to adjust 'atom_size' now when a generic percpu area > is used. It would be redundant to write down an architecture-specific > setup_per_cpu_areas() in order to only change the 'atom_size'. Thus, > this patch adds a new definition, PERCPU_ATOM_SIZE, which is PAGE_SIZE > by default. The value could be updated if needed by architecture.
What is atom_size? Why would you want a difference allocation size here? The percpu area is virtually mapped regardless. So you will have contiguous addresses even without atom_size.
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