Re: [PATCH] solves freeze due to serial comm. on SMP

From: Andrew Morton (
Date: Thu Jan 03 2002 - 00:46:06 EST

kees wrote:
> Hi,
> In the beginning of last year I reported a solid freeze problem with Linux
> when I moved from UP to SMP. Some bughunting especially with kdb an hints
> from AM I was able to nail it down to some SMP unsafe irq table handling
> in serial.c.
> I submitted the attached patch to Ted but that never made it to the
> kernel. It _really_ solved the problem as I had a crash sometimes within
> 15 minutes and after applying it I reached uptimes over 100 days.

It looks like somebody has already had a go at fixing this in current
kernels - the restore_flags() has been moved to the end of
shutdown(). (It's not a complete fix, because request_irq() can

Are you able to test 2.4.17?
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

This archive was generated by hypermail 2b29 : Mon Jan 07 2002 - 21:00:20 EST