#!/bin/bash # # Copyright (c) 2011 Bryan Schumaker # # Script for easier NFSD fault injection # Check that debugfs has been mounted DEBUGFS=`cat /proc/mounts | grep debugfs` if [ "$DEBUGFS" == "" ]; then echo "debugfs does not appear to be mounted!" echo "Please mount debugfs and try again" exit 1 fi # Check that the fault injection directory exists DEBUGDIR=`echo $DEBUGFS | awk '{print $2}'`/nfsd if [ ! -d "$DEBUGDIR" ]; then echo "$DEBUGDIR does not exist" echo "Check that your .config selects CONFIG_NFSD_FAULT_INJECTION" exit 1 fi function help() { echo "Usage $0 injection_type [count]" echo "" echo "Injection types are:" ls $DEBUGDIR exit 1 } if [ $# == 0 ]; then help elif [ ! -f $DEBUGDIR/$1 ]; then help elif [ $# != 2 ]; then COUNT=0 else COUNT=$2 fi BEFORE=`mktemp` AFTER=`mktemp` dmesg > $BEFORE echo $COUNT > $DEBUGDIR/$1 dmesg > $AFTER # Capture lines that only exist in the $AFTER file diff $BEFORE $AFTER | grep ">" rm -f $BEFORE $AFTER ();'> net-next plumbingsTobias Klauser
summaryrefslogtreecommitdiff
path: root/tools/testing
diff options
context:
space:
mode:
authorSteven Rostedt (VMware) <rostedt@goodmis.org>2017-01-30 19:27:10 -0500
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2017-01-31 09:13:49 -0500
commit79c6f448c8b79c321e4a1f31f98194e4f6b6cae7 (patch)
tree370efda701f03cccf21e02bb1fdd3b852547d75c /tools/testing
parent0c744ea4f77d72b3dcebb7a8f2684633ec79be88 (diff)
tracing: Fix hwlat kthread migration
The hwlat tracer creates a kernel thread at start of the tracer. It is pinned to a single CPU and will move to the next CPU after each period of running. If the user modifies the migration thread's affinity, it will not change after that happens. The original code created the thread at the first instance it was called, but later was changed to destroy the thread after the tracer was finished, and would not be created until the next instance of the tracer was established. The code that initialized the affinity was only called on the initial instantiation of the tracer. After that, it was not initialized, and the previous affinity did not match the current newly created one, making it appear that the user modified the thread's affinity when it did not, and the thread failed to migrate again. Cc: stable@vger.kernel.org Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'tools/testing')