Merge tag 'csky-for-linus-4.20' of https://github.com/c-sky/csky-linux

[linux-2.6-microblaze.git] / Documentation / vm / slub.rst

diff --git a/Documentation/vm/slub.rst b/Documentation/vm/slub.rst
index 3a775fd..1959288 100644 (file)
--- a/Documentation/vm/slub.rst
+++ b/Documentation/vm/slub.rst
@@ -36,9 +36,10 @@ debugging is enabled. Format:
 
 slub_debug=<Debug-Options>
        Enable options for all slabs
-slub_debug=<Debug-Options>,<slab name>
-       Enable options only for select slabs
 
+slub_debug=<Debug-Options>,<slab name1>,<slab name2>,...
+       Enable options only for select slabs (no spaces
+       after a comma)
 
 Possible debug options are::
 
@@ -62,7 +63,12 @@ Trying to find an issue in the dentry cache? Try::
 
        slub_debug=,dentry
 
-to only enable debugging on the dentry cache.
+to only enable debugging on the dentry cache.  You may use an asterisk at the
+end of the slab name, in order to cover all slabs with the same prefix.  For
+example, here's how you can poison the dentry cache as well as all kmalloc
+slabs:
+
+       slub_debug=P,kmalloc-*,dentry
 
 Red zoning and tracking may realign the slab.  We can just apply sanity checks
 to the dentry cache with::