Gerald Schaefer 8fe627ec5b hugetlbfs: add missing TLB flush to hugetlb_cow()
A cow break on a hugetlbfs page with page_count > 1 will set a new pte with
set_huge_pte_at(), w/o any tlb flush operation.  The old pte will remain in
the tlb and subsequent write access to the page will result in a page fault
loop, for as long as it may take until the tlb is flushed from somewhere else.
 This patch introduces an architecture-specific huge_ptep_clear_flush()
function, which is called before the the set_huge_pte_at() in hugetlb_cow().

ATTENTION: This is just a nop on all architectures for now, the s390
implementation will come with our large page patch later.  Other architectures
should define their own huge_ptep_clear_flush() if needed.

Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-28 08:58:25 -07:00
..
2008-02-14 14:22:12 +09:00
2007-05-14 09:18:35 +09:00
2006-10-03 13:16:15 +09:00
2005-04-16 15:20:36 -07:00
2008-01-28 13:18:58 +09:00
2008-01-28 13:18:58 +09:00
2008-01-28 13:18:58 +09:00
2008-01-28 13:18:58 +09:00
2008-01-28 13:18:52 +09:00
2008-04-18 09:50:01 -07:00
2005-04-16 15:20:36 -07:00
2005-04-16 15:20:36 -07:00
2008-03-06 17:23:15 +09:00
2005-04-16 15:20:36 -07:00
2007-09-21 11:57:53 +09:00
2007-05-09 17:36:15 +09:00
2007-05-09 08:58:16 +02:00
2005-04-16 15:20:36 -07:00
2007-07-17 10:23:11 -07:00
2006-01-16 23:15:28 -08:00
2007-06-18 13:58:32 +09:00
2007-06-18 13:58:32 +09:00
2008-01-28 13:19:01 +09:00
2007-09-21 11:57:51 +09:00
2008-02-14 14:22:11 +09:00
2008-04-18 00:46:34 +02:00
2007-09-21 11:57:48 +09:00
2008-02-14 14:22:09 +09:00
2008-02-14 14:25:37 +09:00
2006-01-10 08:01:34 -08:00
2008-02-14 14:22:07 +09:00
2005-04-16 15:20:36 -07:00
2008-02-14 14:22:12 +09:00
2007-05-07 02:11:55 +00:00
2005-04-16 15:20:36 -07:00
2005-04-16 15:20:36 -07:00
2008-01-28 23:21:18 +01:00
2008-04-18 09:50:03 -07:00
2006-02-15 15:32:22 -08:00
2007-02-13 10:54:45 +09:00
2007-06-08 02:43:49 +00:00
2008-01-28 13:18:39 +09:00
2005-04-16 15:20:36 -07:00
2005-04-16 15:20:36 -07:00
2008-01-28 13:19:01 +09:00
2008-01-28 13:18:55 +09:00
2005-04-16 15:20:36 -07:00
2008-04-28 08:58:23 -07:00
2008-04-28 08:58:23 -07:00
2006-09-27 16:20:22 +09:00
2007-05-11 08:29:34 -07:00
2005-04-16 15:20:36 -07:00
2008-02-14 14:22:09 +09:00
2008-01-28 13:19:04 +09:00
2006-12-06 10:45:37 +09:00
2005-04-16 15:20:36 -07:00
2008-04-17 10:42:34 -04:00
2005-04-16 15:20:36 -07:00
2007-02-15 18:20:52 +09:00
2005-04-16 15:20:36 -07:00
2008-04-18 09:50:00 -07:00
2005-04-16 15:20:36 -07:00
2006-10-19 17:31:22 +09:00
2008-01-28 13:18:57 +09:00
2005-04-16 15:20:36 -07:00
2007-06-08 02:43:43 +00:00
2005-04-16 15:20:36 -07:00
2008-02-14 14:22:09 +09:00
2008-04-18 09:50:01 -07:00
2008-02-14 14:22:07 +09:00
2008-02-14 14:22:07 +09:00
2008-01-28 23:21:18 +01:00
2005-04-16 15:20:36 -07:00
2007-10-19 11:53:34 -07:00
2005-04-16 15:20:36 -07:00
2005-04-16 15:20:36 -07:00
2008-02-14 14:22:08 +09:00
2008-02-14 14:22:08 +09:00
2008-02-07 08:42:30 -08:00
2007-11-07 20:19:30 +09:00
2006-09-27 12:31:01 +09:00
2005-04-16 15:20:36 -07:00