[RFC PATCH v19 0/8] mm: security: ro protection for dynamic data
igor.stoppa at huawei.com
Thu Mar 15 13:43:49 UTC 2018
On 14/03/2018 19:33, Matthew Wilcox wrote:
> On Wed, Mar 14, 2018 at 06:11:22PM +0200, Igor Stoppa wrote:
>> Probably page_frag does well with relatively large allocations, while
>> genalloc seems to be better for small (few allocation units) allocations.
> I don't understand why you would think that. If you allocate 4096 1-byte
> elements, page_frag will just use up a page. Doing the same thing with
> genalloc requires allocating two bits per byte (1kB of bitmap), plus
> other overheads.
I had misunderstood the amount of page_frag structures needed.
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