1 #! /bin/sh 2 3 ########################################################################### 4 ## ## 5 ## Copyright (c) 2015, Red Hat Inc. ## 6 ## ## 7 ## This program is free software: you can redistribute it and/or modify ## 8 ## it under the terms of the GNU General Public License as published by ## 9 ## the Free Software Foundation, either version 3 of the License, or ## 10 ## (at your option) any later version. ## 11 ## ## 12 ## This program is distributed in the hope that it will be useful, ## 13 ## but WITHOUT ANY WARRANTY; without even the implied warranty of ## 14 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ## 15 ## GNU General Public License for more details. ## 16 ## ## 17 ## You should have received a copy of the GNU General Public License ## 18 ## along with this program. If not, see <http://www.gnu.org/licenses/>. ## 19 ## ## 20 ## Author: Li Wang <liwang (at] redhat.com> ## 21 ## ## 22 ########################################################################### 23 ## ## 24 ## Summary: panic while using userstacktrace ## 25 ## ## 26 ## BUG: unable to handle kernel paging request at 00000000417683c0 ## 27 ## IP: [<ffffffff8105c834>] update_curr+0x124/0x1e0 ## 28 ## PGD 41a796067 PUD 0 ## 29 ## Thread overran stack, or stack corrupted ## 30 ## Oops: 0000 [#1] SMP ## 31 ## last sysfs file: ../system/cpu/cpu15/cache/index2/shared_cpu_map ## 32 ## ## 33 ## The bug was fixed by: ## 34 ## 1dbd195 (tracing: Fix preempt count leak) ## 35 ## ## 36 ########################################################################### 37 38 export TCID="ftrace_regression01" 39 export TST_TOTAL=1 40 41 . ftrace_lib.sh 42 43 LOOP=10 44 45 TSTACK_TRACE_PATH="/proc/sys/kernel/stack_tracer_enabled" 46 EXC_PAGE_FAULT_ENABLE="$TRACING_PATH/events/exceptions/page_fault_kernel/enable" 47 MM_PAGE_FAULT_ENABLE="$TRACING_PATH/events/kmem/mm_kernel_pagefault/enable" 48 49 ftrace_userstacktrace_test() 50 { 51 if [ ! -e "$TSTACK_TRACE_PATH" ]; then 52 tst_brkm TCONF "Stack Tracer is not cofigured in This kernel" 53 fi 54 55 for i in $(seq $LOOP); do 56 echo 1 > $TSTACK_TRACE_PATH 57 echo userstacktrace > $TRACING_PATH/trace_options 58 grep -q "^userstacktrace" $TRACING_PATH/trace_options 59 if [ $? -ne 0 ]; then 60 tst_brkm TBROK "Failed to set userstacktrace" 61 fi 62 63 if [ -f "$EXC_PAGE_FAULT_ENABLE" ]; then 64 exc_page_fault_enable=`cat $EXC_PAGE_FAULT_ENABLE` 65 echo 1 > $EXC_PAGE_FAULT_ENABLE 66 else 67 mm_page_fault_enable=`cat MM_PAGE_FAULT_ENABLE` 68 echo 1 > $MM_PAGE_FAULT_ENABLE 69 fi 70 done 71 72 if [ -f "$EXC_PAGE_FAULT_ENABLE" ]; then 73 echo "$exc_page_fault_enable" > $EXC_PAGE_FAULT_ENABLE 74 else 75 echo "$mm_page_fault_enable" > $MM_PAGE_FAULT_ENABLE 76 fi 77 78 tst_resm TPASS "Finished running the test" 79 } 80 81 ftrace_userstacktrace_test 82 83 tst_exit 84
