Messages in this thread | | | Date | Tue, 21 Feb 2023 09:14:58 -0800 | From | Jakub Kicinski <> | Subject | Re: [PATCH v3] page_pool: add a comment explaining the fragment counter usage |
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On Sat, 18 Feb 2023 00:21:30 +0200 Ilias Apalodimas wrote: > When reading the page_pool code the first impression is that keeping > two separate counters, one being the page refcnt and the other being > fragment pp_frag_count, is counter-intuitive. > > However without that fragment counter we don't know when to reliably > destroy or sync the outstanding DMA mappings. So let's add a comment > explaining this part.
I discussed with Paolo off-list, since it's just a comment change I'll push it in.
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