lkml.org 
[lkml]   [2008]   [Mar]   [24]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateMon, 24 Mar 2008 12:53:19 -0700 (PDT)
FromChristoph Lameter <>
SubjectRe: [11/14] vcompound: Fallbacks for order 1 stack allocations on IA64 and x86
On Fri, 21 Mar 2008, Andi Kleen wrote:

> The traditional reason this was discouraged (people seem to reinvent
> variants of this patch all the time) was that there used 
> to be drivers that did __pa() (or equivalent) on stack addresses
> and that doesn't work with vmalloc pages.
> 
> I don't know if such drivers still exist, but such a change
> is certainly not a no-brainer

I thought that had been cleaned up because some arches already have 
virtually mapped stacks? This could be debugged by testing with
CONFIG_VFALLBACK_ALWAYS set. Which results in a stack that is always 
vmalloc'ed and thus the driver should fail.


--
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: 2008-03-24 20:59    [from the cache]
©2003-2008