Re: [Xen-devel] [PATCH 5/6] xen-netback: coalesce slots before copying

[James Harper <james.harper@xxxxxxxxxxxxxxxx>]

> > It's not clear why 19 or 20 were suggested as possible values.  I
> > checked back to 2.6.18 and MAX_SKB_FRAGS there is (65536/PAGE_SIZE +
> 2)
> 
> Because the check is >= MAX_SKB_FRAGS originally and James Harper told
> me that "Windows stops counting on 20".
> 

I've obviously not been clear enough here... GPLPV stopped counting at 20 (only 
needed to know if <20 or not). Windows itself can submit a packet to NDIS with 
hundreds of buffers. It doesn't really matter if it's 21 or 1021, I just didn't 
want to be misquoted.

James

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