Comment 8 for bug 1469214

Running the following:

#!/bin/bash
tests="affinity aio bigheap brk bsearch cache chdir chmod clock context cpu crypt dentry dir dup epoll eventfd fstat fallocate fault fifo flock fork futex get getrandom hdd hsearch inotify io itimer kcmp kill lease link lockf longjmp lsearch malloc matrix memcpy memfd mincore mlock mmap mmapmany mremap msg mq nice null open pipe poll procfs pthread qsort readahead rename rlimit seek sem sem-sysv sendfile shm-sysv sigfd sigfpe sigq sigsegv sock splice stack str switch symlink sysinfo sysfs tee timer timerfd tsearch udp udp-flood urandom utime vecmath vfork vm vm-rw vm-splice wcs wait yield xattr zero zombie"

for t in $tests
do
        echo $t
        echo $t > /dev/kmsg
        ./stress-ng --$t 0 -v -t 60
done

eventually tripped the translation fault in irqbalance. I ran this after a clean reboot.

[ 4901.799846] timerfd
[ 4961.807050] tsearch
[ 5021.884456] udp
[ 5081.895058] udp-flood
[ 5141.674365] irqbalance[827]: unhandled level 2 translation fault (11) at 0x002d6da4, esr 0x92000006
[ 5141.674376] pgd = ffffffcfb51a0000
[ 5141.715215] [002d6da4] *pgd=0000004fb677e003, *pud=0000004fb677e003, *pmd=0000000000000000

[ 5141.816183] CPU: 0 PID: 827 Comm: irqbalance Not tainted 3.19.0-21-generic #21-Ubuntu
[ 5141.816185] Hardware name: HP ProLiant m400 Server Cartridge (DT)
[ 5141.816188] task: ffffffcfac088000 ti: ffffffcfab710000 task.ti: ffffffcfab710000
[ 5141.816206] PC is at 0x7f88287834
[ 5141.816208] LR is at 0x7f882877f4
[ 5141.816210] pc : [<0000007f88287834>] lr : [<0000007f882877f4>] pstate: 80000000
[ 5141.816212] sp : 0000007ff2e46b30
[ 5141.816214] x29: 0000007ff2e46b30 x28: 00000000004095a0
[ 5141.816217] x27: 0000000000409548 x26: 000000000041a000
[ 5141.816220] x25: 0000000000000001 x24: 0000000000000010
[ 5141.816222] x23: 000000002d6c98a0 x22: 000000002d6c9880
[ 5141.816225] x21: 0000000000000018 x20: 0000007f88323000
[ 5141.816228] x19: 0000000000000002 x18: 0000000000000000
[ 5141.816230] x17: 0000007f87f8d8ec x16: 0000007f883222e0
[ 5141.816233] x15: 0000000000000020 x14: 0000000000000001
[ 5141.816235] x13: 0000000000000000 x12: 0000000000000000
[ 5141.816237] x11: 0000007ff2e446a0 x10: 0000000000000010
[ 5141.816240] x9 : 00000000000000a0 x8 : 0000000000000007
[ 5141.816242] x7 : 0000000000000033 x6 : 000000002d6c9c80
[ 5141.816245] x5 : 0000000000000001 x4 : 0000007f87fa62a0
[ 5141.816247] x3 : 000000002d6c9880 x2 : 0000000000000001
[ 5141.816250] x1 : 00000000000003fa x0 : 00000000002d6d9c

[ 5141.907792] urandom
[ 5201.928712] utime
[ 5261.934534] vecmath
[ 5321.940302] vfork
[ 5381.947904] vm
[ 5441.991784] vm-rw
[ 5502.017614] vm-splice
[ 5562.023334] wcs
[ 5622.037054] wait
[ 5682.043302] yield
[ 5742.056595] xattr
[ 5802.075772] zero
[ 5862.087396] zombie