Re: [PATCH] 2.6.18-rt7: PowerPC: fix breakage in threaded fasteoi type IRQ handlers

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

 

* Benjamin Herrenschmidt <[email protected]> wrote:

> > dont worry, it's -rt only stuff.
> 
> Still, I'm curious :-) Besides, there have been people talking about 
> having -rt work on ppc64 so ...

ok :)

> What do you need an ack() for on fasteoi ? On all fasteoi controllers 
> I have, ack is implicit by obtaining the vector number and all there 
> is is an eoi...

it's a compatibility hack only. Threaded handlers are a different type 
of flow, but often the fasteoi handler is not changed to the threaded 
handler so i changed it to be a threaded handler too.

threaded handlers need a mask() + an ack(), because that's the correct 
model to map them to kernel threads - threaded handlers can be delayed 
for a long time if something higher-prio is preempting them.

	Ingo
-
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