Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 888a214d authored by Stanislaw Gruszka's avatar Stanislaw Gruszka Committed by Linus Torvalds
Browse files

slub: document setting min order with debug_guardpage_minorder > 0 



Acked-by: default avatarDavid Rientjes <rientjes@google.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: default avatarStanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 15ee2d00

Documentation/ABI/testing/sysfs-kernel-slab

+4 −0
Original line number Original line Diff line number Diff line
@@ -346,6 +346,10 @@ Description: 
		number of objects per slab.  If a slab cannot be allocated

		number of objects per slab.  If a slab cannot be allocated

		because of fragmentation, SLUB will retry with the minimum order

		because of fragmentation, SLUB will retry with the minimum order

		possible depending on its characteristics.

		possible depending on its characteristics.

		When debug_guardpage_minorder=N (N > 0) parameter is specified

		(see Documentation/kernel-parameters.txt), the minimum possible

		order is used and this sysfs entry can not be used to change

		the order at run time.





What:		/sys/kernel/slab/cache/order_fallback

What:		/sys/kernel/slab/cache/order_fallback

Date:		April 2008

Date:		April 2008

Documentation/vm/slub.txt

+4 −1
Original line number Original line Diff line number Diff line
@@ -131,7 +131,10 @@ slub_min_objects. 
slub_max_order specified the order at which slub_min_objects should no

slub_max_order specified the order at which slub_min_objects should no

longer be checked. This is useful to avoid SLUB trying to generate

longer be checked. This is useful to avoid SLUB trying to generate

super large order pages to fit slub_min_objects of a slab cache with

super large order pages to fit slub_min_objects of a slab cache with

large object sizes into one high order page.

large object sizes into one high order page. Setting command line

parameter debug_guardpage_minorder=N (N > 0), forces setting

slub_max_order to 0, what cause minimum possible order of slabs

allocation.





SLUB Debug output

SLUB Debug output

-----------------

-----------------