Hello all,
I just wanted to hint that this very same BUG message appears on channel
bundling of ISDN, too. Greg, can you give a short description for this race
please, as I would like to find it in the ISDN-code, maybe your ideas help...
Thanks,
Stephan
On Thu, 27 Mar 2003 11:16:00 +0000
Chris Sykes <chris@sigsegv.plus.com> wrote:
> On Wed, Mar 26, 2003 at 11:34:37AM -0800, Greg KH wrote:
> > > Anyway I'll test out a 2.5 kernel when I'm back in the office
> > > tomorrow, I can devote some time to tracking down the problem if you
> > > can give me some pointers on where to start. I'd like to be able to
> > > feel confident that this will work reliably under 2.4, otherwise I
> > > guess I need to look for alternate solutions.
> >
> > The problem is in the race on close() in the usb-serial.c code. In 2.5
> > that logic has been rewritten to (hopefully) get rid of the race. That
> > is what will need to be backported, once people test that this fixes the
> > issue.
>
> OK. 2.5.66 compiled and booted.
>
> I've jumpered the hardware back to how it was originally when I
> experienced the problem.
> I've been working happily for about 10 mins with:
>
> while /bin/true; do
> for i in *; do
> cat $i >/dev/ttyUSB0
> done
> done
>
> No Oopsen or errors in dmesg as yet. (Before I was getting many errors
> about 0 size writes).
>
> I can keep working under 2.5.66 for now to see if I experience any
> problems, but it would appear that the race is gone in 2.5.66
> (CONFIG_PREEMPT=y)
>
> If you'd like me to try any patches against 2.4 just let me know.
>
> Thanks again,
>
> --
>
> (o- Chris Sykes -- GPG Key: http://www.sigsegv.plus.com/key.txt
> //\ "Don't worry. Everything is getting nicely out of control ..."
> V_/_ Douglas Adams - The Salmon of Doubt
>
>
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