diff options
| author | Waiman Long <longman@redhat.com> | 2017-02-08 10:44:15 +1100 |
|---|---|---|
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2017-02-09 17:01:39 +1100 |
| commit | adf0206f053cc0bfb4b8e7ddb4ef81b9ecfdd99e (patch) | |
| tree | fbc6a2241b41b44df71900b9f18235983db2795c /mm | |
| parent | b4d623f67460595ba2c37eefceec33a3cea97422 (diff) | |
debugobjects: scale thresholds with # of CPUs
On a large SMP systems with hundreds of CPUs, the current thresholds for
allocating and freeing debug objects (256 and 1024 respectively) may not
work well. This can cause a lot of needless calls to kmem_aloc() and
kmem_free() on those systems.
To alleviate this thrashing problem, the object freeing threshold is now
increased to "1024 + # of CPUs * 32". Whereas the object allocation
threshold is increased to "256 + # of CPUs * 4". That should make the
debug objects subsystem scale better with the number of CPUs available in
the system.
Link: http://lkml.kernel.org/r/1483647425-4135-3-git-send-email-longman@redhat.com
Signed-off-by: Waiman Long <longman@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "Du Changbin" <changbin.du@intel.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Jan Stancek <jstancek@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions