lkml.org 
[lkml]   [2007]   [Jan]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC] Asynchronous Messaging
> This is accomplished by allocating a page (or more) of memory which
> is executable and mapped into every threads address space. Also, all
> ISR entry points are modified to detect if the code that was interrupted
> was executing within the ACE page. If it was then the ACE code is
> allowed to complete before the ISR continues. This then provides
> the guarantee of atomic execution.

What if you enter the ISR, pass the point of the check and then another
CPU core hits the ACE space ?

Also how do you handle the case where the code gets stuck in your atomic
pages ?

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

\
 
 \ /
  Last update: 2007-01-22 16:13    [from the cache]
©2003-2014 Jasper Spaans. hosted at Digital Ocean