Re: Early SPECWeb99 results on 2.5.33 with TSO on e1000

David S. Miller wrote:

   From: Jeff Garzik [off-list ref]
   Date: Mon, 16 Sep 2002 19:08:15 -0400
   
   I was rather disappointed when file->file sendfile was [purposefully?] 
   broken in 2.5.x...

What change made this happen?

I dunno when it happened, but 2.5.x now returns EINVAL for all 
file->file cases.

In 2.4.x, if sendpage is NULL, file_send_actor in mm/filemap.c faked a 
call to fops->write().
In 2.5.x, if sendpage is NULL, EINVAL is unconditionally returned.