lkml.org 
[lkml]   [2007]   [Jun]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 3/6] lguest suppress IDE probing
From
Date
On Wed, 2007-06-06 at 11:23 +0100, Alan Cox wrote:
> > > Better yet just don't compile in the old IDE stuff, lguest doesn't have a
> > > PCI or ISA bus anyway.
> >
> > Sure, but the "run the same kernel as guest and host" is a really nice
> > feature.
>
> Modules dear boy, modules ;)

For some reason, pulling half the kernel's brains out into a separately
maintained userspace seems to make things less reliable. I always build
in everything I need to boot.

Perhaps this makes me an old-timer.

> > > Alternatively make the IDE I/O space return 0xFF and it'll skip them
> > > anyway.
> >
> > Hmm, every "in" should be returning 0xFFs, but I still get the delay and
> > the probing. Xen domU gets it too.
>
> Can you see in a debugger where it is spending the time. 0xFF should be
> taken as "no port, move on nothing to see"

Well, the code is a little opaque to me, but do_probe() calls msleep(50)
three times. According to gdb this gets called 27 times -> 4.05
seconds.

Cheers,
Rusty.


-
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: 2007-06-07 04:15    [W:0.095 / U:0.288 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site