lkml.org 
[lkml]   [2001]   [May]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] x86 page fault handler not interrupt safe
Date
From
> Alan Cox wrote:
> > (The current -ac fix for the double vmalloc races is below. WP test makes it
> > more complex than is nice)
>
> WP test is easy to handle. Just filter out protection violations and
> only take the vmalloc path if the page was not found.
>
> - if (address >= TASK_SIZE && !(error_code & 4))
> + if (address >= TASK_SIZE && !(error_code & 5))

That is nice. I hadn't thought about doing it that way. It still has the problem
if %cr2 is corrupted by a vmalloc fault but it cleans up my other code paths
nicely.

Thanks

-
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 12:52    [from the cache]
©2003-2011 Jasper Spaans