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SubjectRe: [linux-usb-devel] Re: [BK PATCH] USB changes for 2.5.34
On Sun, Sep 15, 2002 at 12:26:02PM -0700, Linus Torvalds wrote:
> On Sun, 15 Sep 2002, Daniel Phillips wrote:
> >
> > I use UML all the time. It's great, but it doesn't work for SMP debugging.
> That should not be something fundamental, though. It should be perfectly
> doable with threading. "SMOP".

I run into problems fairly often that I can't reproduce in UML - timing
sensitive, hardware sensitive, etc. Some of them KGDB perturbs too
much to be useful, but most of the time I can get it to work. UML also
doesn't use a lot of the code under arch/i386/ (or didn't at least)
which makes debugging that code under UML a bit futile.

> Yeah, and gdb (not to mention all the grapical nice stuff) sucks in a
> threaded environment. At least it used to.

Well, yeah. It's getting a little bit better - a lot better for some
cases - but no one's really sure where it needs to go to keep
improving. I'm making a little progress.

Daniel Jacobowitz
MontaVista Software Debian GNU/Linux Developer
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