diff options
| author |   Aaron Tomlin <[email protected]> | 2018-10-26 15:03:15 -0700 |
|---|---|---|
| committer |   Linus Torvalds <[email protected]> | 2018-10-26 16:25:19 -0700 |
| commit | c5fd3ca06b4699e251b4a1fb808c2d5124494101 (patch) | |
| tree | 0007bbcd929bd6350d72e3954545ec05e941094e /Documentation/vm | |
| parent | mm: don't warn about large allocations for slab (diff) | |
| download | wireguard-linux-c5fd3ca06b4699e251b4a1fb808c2d5124494101.tar.xz wireguard-linux-c5fd3ca06b4699e251b4a1fb808c2d5124494101.zip | |
slub: extend slub debug to handle multiple slabs
Extend the slub_debug syntax to "slub_debug=<flags>[,<slub>]*", where
<slub> may contain an asterisk at the end. For example, the following
would poison all kmalloc slabs:
slub_debug=P,kmalloc*
and the following would apply the default flags to all kmalloc and all
block IO slabs:
slub_debug=,bio*,kmalloc*
Please note that a similar patch was posted by Iliyan Malchev some time
ago but was never merged:
https://marc.info/?l=linux-mm&m=131283905330474&w=2
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Aaron Tomlin <[email protected]>
Acked-by: Christoph Lameter <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Cc: Iliyan Malchev <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'Documentation/vm')
| -rw-r--r-- | Documentation/vm/slub.rst | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/Documentation/vm/slub.rst b/Documentation/vm/slub.rst index 3a775fd64e2d..195928808bac 100644 --- 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:: |