Comment 17 for bug 553789

This bug is a huge mystery and I'm starting to think it's a hw bug. One possibility is that it's triggered by a particular insn sequence that DDX uses. Could you please try http://0x04.net/~mwk/nva5-hack.patch and see if the lockups still happen?

If anyone hits this bug, with the above patch or without, please compile pgtest from http://0x04.net/cgit/index.cgi/pgtest and give the output of ./peek 0x400000 0x10000 after the lockup.