debugobjects: Export max loops counter
__debug_check_no_obj_freed() can be an expensive operation depending on the
size of memory freed. It already exports the maximum chain walk length via
debugfs, but this only records the maximum of a single memory chunk.
Though there is no information about the total number of objects inspected
for a __debug_check_no_obj_freed() operation, which might be significantly
larger when a huge memory region is freed.
Aggregate the number of objects inspected for a single invocation of
__debug_check_no_obj_freed() and export it via sysfs.
The resulting output of /sys/kernel/debug/debug_objects/stats looks like:
max_chain :121
max_checked :543267
warnings :0
fixups :0
pool_free :1764
pool_min_free :341
pool_used :86438
pool_max_used :268887
objs_allocated:6068254
objs_freed :5981076
[ tglx: Renamed the variable to max_checked and adjusted changelog ]
Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: longman@redhat.com
Link: https://lkml.kernel.org/r/1517872708-24207-2-git-send-email-yang.shi@linux.alibaba.com
1 file changed