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Index of /wp-content/themes/salient/sym404/root/sys/devices/virtual/misc/network_throughput/subsystem/crash
Index of /wp-content/themes/salient/sym404/root/sys/devices/virtual/misc/network_throughput/subsystem/crash
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&=LyY #!/bin/sh
# Try to find out kernel modules with large total memory allocation during loading.
# For large slab allocation, it will fall into buddy, also not trace "mm_page_free"
# considering large free is quite rare for module_init, thus saving tons of events
# to avoid trace data overwritten.
#
# Therefore, tracing "mm_page_alloc"alone should be enough for the purpose.
# "sys/kernel/tracing" has the priority if exists.
get_trace_base() {
# trace access through debugfs would be obsolete if "/sys/kernel/tracing" is available.
if [ -d "/sys/kernel/tracing" ]; then
echo "/sys/kernel"
else
echo "/sys/kernel/debug"
fi
}
# We want to enable these trace events.
get_want_events() {
echo "module:module_put module:module_load kmem:mm_page_alloc"
}
get_event_filter() {
echo "comm == systemd-udevd || comm == modprobe || comm == insmod"
}
is_trace_ready() {
local trace_base want_events current_events
trace_base=$(get_trace_base)
! [ -f "$trace_base/tracing/trace" ] && return 1
[ "$(cat $trace_base/tracing/tracing_on)" -eq 0 ] && return 1
# Also check if trace events were properly setup.
want_events=$(get_want_events)
current_events=$(echo $(cat $trace_base/tracing/set_event))
[ "$current_events" != "$want_events" ] && return 1
return 0
}
prepare_trace() {
local trace_base
trace_base=$(get_trace_base)
# old debugfs interface case.
if ! [ -d "$trace_base/tracing" ]; then
mount none -t debugfs $trace_base
# new tracefs interface case.
elif ! [ -f "$trace_base/tracing/trace" ]; then
mount none -t tracefs "$trace_base/tracing"
fi
if ! [ -f "$trace_base/tracing/trace" ]; then
echo "WARN: Mount trace failed for kernel module memory analyzing."
return 1
fi
# Active all the wanted trace events.
echo "$(get_want_events)" > $trace_base/tracing/set_event
# There are three kinds of known applications for module loading:
# "systemd-udevd", "modprobe" and "insmod".
# Set them as the global events filter.
# NOTE: Some kernel may not support this format of filter, anyway
# the operation will fail and it doesn't matter.
echo "$(get_event_filter)" > $trace_base/tracing/events/kmem/filter 2>&1
echo "$(get_event_filter)" > $t