Re: NetBSD 5 strangeness

["Michael L. Hitch" <mhitch%lightning.msu.montana.edu@localhost>]

On Fri, 17 Apr 2009, Izumi Tsutsui wrote:

> This should be fixed in -current and 5.0_RC4
> by patch provided by Michael L. Hitch. (PR port-vax/41139)

  I think I have figured out why this started happening between 5.0_RC2 
and 5.0_RC3:  PIPE_NODIRECT was defined in sys/kern/sys_pipe.c to disable 
the "direct" operation.  I think this caused the vax to start using the 
copyin/copyout functions for big pipes, which failed at 64KB.  I'm not 
sure why it wasn't failing when using direct - I'd guess maybe it didn't 
end up doing a 64KB copy, or used a copy function that could handle that.

--
Michael L. Hitch                        mhitch%montana.edu@localhost
Computer Consultant
Information Technology Center
Montana State University        Bozeman, MT     USA