cvs commit: src/sys/dev/nfe if_nfe.c if_nfereg.h

Andrew Gallatin gallatin at cs.duke.edu
Tue Jun 12 10:05:49 UTC 2007


Pyun YongHyeon [yongari at FreeBSD.org] wrote:
> yongari     2007-06-12 02:35:01 UTC
> 
>   FreeBSD src repository
> 
>   Modified files:
>     sys/dev/nfe          if_nfe.c if_nfereg.h 
>   Log:
>   Increase a maximum segment size of DMA to 4096. Previously it used
>   MCLBYTES for the segment size but it used too many Tx descriptors in
>   TSO case.
>   While I'm here adjust maximum size of the sum of all segment lengths
>   in a given DMA mapping to 65535, the maximum size, in bytes, of a IP

Can't it actually be 65535 + link layer headers?  Eg, up to
65535 + 14 or 65535 + 18?

Drew


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