| Server IP : 127.0.1.1 / Your IP : 216.73.216.152 Web Server : Apache/2.4.52 (Ubuntu) System : Linux bahcrestlinepropertiesllc 5.15.0-113-generic #123-Ubuntu SMP Mon Jun 10 08:16:17 UTC 2024 x86_64 User : www-data ( 33) PHP Version : 7.4.33 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : ON Directory : /lib/modules/5.15.0-161-generic/build/tools/testing/selftests/powerpc/mm/ |
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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0-or-later
TIMEOUT=30
DEBUFS_DIR=`cat /proc/mounts | grep debugfs | awk '{print $2}'`
if [ ! -e "$DEBUFS_DIR" ]
then
echo "debugfs not found, skipping" 1>&2
exit 4
fi
if [ ! -e "$DEBUFS_DIR/tracing/current_tracer" ]
then
echo "Tracing files not found, skipping" 1>&2
exit 4
fi
echo "Testing for spurious faults when mapping kernel memory..."
if grep -q "FUNCTION TRACING IS CORRUPTED" "$DEBUFS_DIR/tracing/trace"
then
echo "FAILED: Ftrace already dead. Probably due to a spurious fault" 1>&2
exit 1
fi
dmesg -C
START_TIME=`date +%s`
END_TIME=`expr $START_TIME + $TIMEOUT`
while [ `date +%s` -lt $END_TIME ]
do
echo function > $DEBUFS_DIR/tracing/current_tracer
echo nop > $DEBUFS_DIR/tracing/current_tracer
if dmesg | grep -q 'ftrace bug'
then
break
fi
done
echo nop > $DEBUFS_DIR/tracing/current_tracer
if dmesg | grep -q 'ftrace bug'
then
echo "FAILED: Mapping kernel memory causes spurious faults" 1>&2
exit 1
else
echo "OK: Mapping kernel memory does not cause spurious faults"
exit 0
fi