lkml.org 
[lkml]   [2003]   [Nov]   [19]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateTue, 18 Nov 2003 23:24:04 -0800 (PST)
FromLinus Torvalds <>
SubjectRe: [PATCH][2.6-mm] Fix 4G/4G X11/vm86 oops
On Wed, 19 Nov 2003, Zwane Mwaikambo wrote:
> 
> I just tried the RH9 2.96 and it also triple faulted. Oh my.. The only 
> unique thing about this hardware compared ot the other stuff i have here 
> is that it's an AMD K6. Everything else is Intel.

Different TLB sizes (and organizations) etc can _easily_ matter, if the 
Intel one just happens to work because something stays in the TLB while 
the page table mapping is incorrect and keeps the system afloat.

Or - and in this case more likely - since the problem is fixed by running
a (complex) thing that trashes all over the DTLB/ITLB, it's more likely
that there might be a _missing_ TLB invalidate somewhere, and that the
Intel boxes stay up because they have a smaller TLB and the stale entry
gets flushed out early from them.

But you already tried a "flush_tlb_all()" which _should_ have flushed
absolutely everything, including global tables. I dunno. It could be
hitting a CPU bug too, of course. 

It would be interesting to hear if other K6 users see problems..

			Linus

-
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: 2005-03-22 12:58    [from the cache]
©2003-2008