Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The /sys/kernel/slab directory contains a snapshot of the
internal state of the SLUB allocator for each cache. Certain
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The aliases file is read-only and specifies how many caches
have merged into this cache.
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The align file is read-only and specifies the cache's object
alignment in bytes.
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The alloc_calls file is read-only and lists the kernel code
locations from which allocations for this cache were performed.
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The alloc_fastpath file shows how many objects have been
allocated using the fast path. It can be written to clear the
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The alloc_from_partial file shows how many times a cpu slab has
been full and it has been refilled by using a slab from the list
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The alloc_refill file shows how many times the per-cpu freelist
was empty but there were objects available as the result of
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The alloc_slab file is shows how many times a new slab had to
be allocated from the page allocator. It can be written to
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The alloc_slowpath file shows how many objects have been
allocated using the slow path because of a refill or
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The cache_dma file is read-only and specifies whether objects
are from ZONE_DMA.
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The cpu_slabs file is read-only and displays how many cpu slabs
are active and their NUMA locality.
Date: April 2009
KernelVersion: 2.6.31
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The file cpuslab_flush shows how many times a cache's cpu slabs
have been flushed as the result of destroying or shrinking a
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The ctor file is read-only and specifies the cache's object
constructor function, which is invoked for each object when a
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The deactivate_empty file shows how many times an empty cpu slab
was deactivated. It can be written to clear the current count.
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The deactivate_full file shows how many times a full cpu slab
was deactivated. It can be written to clear the current count.
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The deactivate_remote_frees file shows how many times a cpu slab
has been deactivated and contained free objects that were freed
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The deactivate_to_head file shows how many times a partial cpu
slab was deactivated and added to the head of its node's partial
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The deactivate_to_tail file shows how many times a partial cpu
slab was deactivated and added to the tail of its node's partial
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The destroy_by_rcu file is read-only and specifies whether
slabs (not objects) are freed by rcu.
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The free_add_partial file shows how many times an object has
been freed in a full slab so that it had to added to its node's
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The free_calls file is read-only and lists the locations of
object frees if slab debugging is enabled (see
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The free_fastpath file shows how many objects have been freed
using the fast path because it was an object from the cpu slab.
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The free_frozen file shows how many objects have been freed to
a frozen slab (i.e. a remote cpu slab). It can be written to
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The free_remove_partial file shows how many times an object has
been freed to a now-empty slab so that it had to be removed from
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The free_slab file shows how many times an empty slab has been
freed back to the page allocator. It can be written to clear
Date: February 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The free_slowpath file shows how many objects have been freed
using the slow path (i.e. to a full or partial slab). It can
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The hwcache_align file is read-only and specifies whether
objects are aligned on cachelines.
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The object_size file is read-only and specifies the cache's
object size.
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The objects file is read-only and displays how many objects are
active and from which nodes they are from.
Date: April 2008
KernelVersion: 2.6.26
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The objects_partial file is read-only and displays how many
objects are on partial slabs and from which nodes they are
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The file objs_per_slab is read-only and specifies how many
objects may be allocated from a single slab of the order
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The order file specifies the page order at which new slabs are
allocated. It is writable and can be changed to increase the
Date: April 2008
KernelVersion: 2.6.26
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The order_fallback file shows how many times an allocation of a
new slab has not been possible at the cache's order and instead
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The partial file is read-only and displays how long many
partial slabs there are and how long each node's list is.
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The poison file specifies whether objects should be poisoned
when a new slab is allocated.
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The reclaim_account file specifies whether the cache's objects
are reclaimable (and grouped by their mobility).
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The red_zone file specifies whether the cache's objects are red
zoned.
Date: January 2008
KernelVersion: 2.6.25
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The file remote_node_defrag_ratio specifies the percentage of
times SLUB will attempt to refill the cpu slab with a partial
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The sanity_checks file specifies whether expensive checks
should be performed on free and, at minimum, enables double free
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The shrink file is used to reclaim unused slab cache
memory from a cache. Empty per-cpu or partial slabs
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The slab_size file is read-only and specifies the object size
with metadata (debugging information and alignment) in bytes.
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The slabs file is read-only and displays how long many slabs
there are (both cpu and partial) and from which nodes they are
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The store_user file specifies whether the location of
allocation or free should be tracked for a cache.
Date: April 2008
KernelVersion: 2.6.26
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The total_objects file is read-only and displays how many total
objects a cache has and from which nodes they are from.
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
The trace file specifies whether object allocations and frees
should be traced.
Date: May 2007
KernelVersion: 2.6.22
Contact: Pekka Enberg <penberg@cs.helsinki.fi>,
- Christoph Lameter <cl@linux-foundation.org>
+ Christoph Lameter <cl@gentwo.org>
Description:
Writing to the validate file causes SLUB to traverse all of its
cache's objects and check the validity of metadata.
What: /sys/kernel/slab/<cache>/slabs_cpu_partial
Date: Aug 2011
-Contact: Christoph Lameter <cl@linux.com>
+Contact: Christoph Lameter <cl@gentwo.org>
Description:
This read-only file shows the number of partialli allocated
frozen slabs.
What: /sys/kernel/slab/<cache>/cpu_partial
Date: Aug 2011
-Contact: Christoph Lameter <cl@linux.com>
+Contact: Christoph Lameter <cl@gentwo.org>
Description:
This read-only file shows the number of per cpu partial
pages to keep around.