Re: [PATCH 2/2] Debug handling of early spurious interrupts

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Tue, 31 Jul 2007 11:25:26 +0900 Fernando Luis Vázquez Cao <[email protected]> wrote:

> > runtime.  Some drivers don't get used by many people and users of some
> > architectures (esp embedded) tend to lag kernel.org by a long time.  So it
> > could be years before all the fallout from this change is finally wrapped
> > up.
> Yes, that is a big concern. However, the same embedded people is
> starting to use both kexec and kdump, so they may suffer the issues we
> are trying to weed out anyway, even if these patches are not applied.
> The difference is that with this new functionality it is possible to
> catch potential problems relatively easily, because any incorrect
> behaviour this may cause will be easily reproducible and, in most cases,
> will reveal itself early at boot time.
> 
> As things stand now, I guess we will keep seeing occasional crashes and
> strange behaviour in kexec-booted kernels, which in some cases will be
> due to incorrect handling of spurious interrupts. Besides, such problems
> are really difficult to reproduce because, commonly, we would need to
> hit an obscure corner case.

Please have a think about what we can do to aid this debugging.  For
example, add an uncondtional printk into request_irq() for now which tells
us what irq is being registered - a print_symbol() of the irq_handler_t
would be pretty good, although I suspect there are a lot of interrupt
handlers with the same name..


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

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux