Freezes with KSTACKOVERFLOW on

[accela]

Since the introduction of KSTACKOVERFLOW i experience long freezes during desktop workload and dmesg getting spammed with
"AMD-Vi: Completion-Wait loop timed out". Turning it off things return back to normal.

vmlinuz/bzImage: http://depositfiles.com/folders/0OMQ5NXJ0
.config: http://pastebin.com/kFMsNXZf
system info: http://pastebin.com/J89Jr3cP

Tested with grsec patch up to "grsecurity-3.0-3.14.5-201406051310.patch"

[PaX Team]

this should be fixed in recent patches, can you retest?