Thread (15 messages) 15 messages, 5 authors, 2019-07-25

Re: [PATCH v3 0/7] Convert skb_frag_t to bio_vec

From: David Miller <davem@davemloft.net>
Date: 2019-07-23 03:48:19

From: Matthew Wilcox <willy@infradead.org>
Date: Mon, 22 Jul 2019 20:08:24 -0700
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>

The skb_frag_t and bio_vec are fundamentally the same (page, offset,
length) tuple.  This patch series unifies the two, leaving the
skb_frag_t typedef in place.  This has the immediate advantage that
we already have iov_iter support for bvecs and don't need to add
support for iterating skbuffs.  It enables a long-term plan to use
bvecs more broadly within the kernel and should make network-storage
drivers able to do less work converting between skbuffs and biovecs.

It will consume more memory on 32-bit kernels.  If that proves
problematic, we can look at ways of addressing it.

v3: Rebase on latest Linus with net-next merged.
  - Reorder the uncontroversial 'Use skb accessors' patches first so you
    can apply just those two if you want to hold off on the full
    conversion.
  - Convert all the users of 'struct skb_frag_struct' to skb_frag_t.
Series applied, will push out to net-next after build testing.

Thanks.
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