lkml.org 
[lkml]   [2000]   [Sep]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Bottom Handles/soft irqs/timer interrupts/SMP .....
On Fri, Sep 29, 2000 at 11:41:57PM +1100, Anton Blanchard wrote:
> On sparc blocking interrupts does not block the reception of cpu cross
> calls, so you cannot do anything like grab locks within a called function.

So if you can't handle the IPI when you get it, set a flag and trap on the
next sti. It certainly sounds like broken hardware to me and it can be
worked around, can't it ?

Maybe we should have a version of smp_call_function that uses softirqs
(unless those are broken on sparc as well ;) ) and use the old version for
the very performance-sensitive parts only ?

Putting all tests for smp_call_function in the timer interrupt code doesn't
make any sense at all to me.

Philipp Rumpf
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 12:38    [from the cache]
©2003-2011 Jasper Spaans. Advertise on this site