On 4/30/19 9:17 PM, Matthew Wilcox wrote:
> From: "Matthew Wilcox (Oracle)" <wi...@infradead.org>
>
> It turns out there's a lot of accessors for the skb_frag, which would
> make this conversion really easy if some drivers didn't bypass them.
> This is what I've done so far; my laptop's not really beefy enough to
> cope with changing skbuff.h too often ;-)
>
> This would be a great time to tell me I'm going about this all wrong.
> I already found one problem in this patch set; some of the drivers should
> have been converted to skb_frag_dma_map() instead of fixing the arguments
> to dma_map_page(). But anyway, I need sleep.
>
I guess the missing part here is the "why" all this is done ?
32 bit hosts will have bigger skb_shared_info and this impacts sk_rcvbuf and
sk_sndbuf limits.
17 * 4 are 68 extra bytes per skb.
