lkml.org 
[lkml]   [2003]   [Sep]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Can we kill f inb_p, outb_p and other random I/O on port 0x80, in 2.6?
Eric W. Biederman wrote:
> Alan, can you describe a little more what the original delay is needed
> for? I don't see it documented in my 8254 data sheet. The better I
> can understand the problem the better I can write the comments on this
> magic bit of code as I fix it.
>
> The oldest machine I have is a 386 MCA system. Any chance of the bug
> showing up there? I'd love to have a test case.
>
> Another reason for fixing this is we are killing who knows how much
> I/O bandwidth with this stream of failing writes to port 0x80.

Unfortunately, a lot of drivers use the _p operators so if the delay
is simply removed, it may take a while before the ill effects of that
are discovered.

-- Jamie
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:48    [W:0.439 / U:0.980 seconds]
©2003-2014 Jasper Spaans. Advertise on this site