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51e95bed DR |
1 | What: /sys/kernel/slab |
2 | Date: May 2007 | |
3 | KernelVersion: 2.6.22 | |
4 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
5 | Christoph Lameter <cl@linux-foundation.org> | |
6 | Description: | |
7 | The /sys/kernel/slab directory contains a snapshot of the | |
8 | internal state of the SLUB allocator for each cache. Certain | |
9 | files may be modified to change the behavior of the cache (and | |
10 | any cache it aliases, if any). | |
11 | Users: kernel memory tuning tools | |
12 | ||
13 | What: /sys/kernel/slab/cache/aliases | |
14 | Date: May 2007 | |
15 | KernelVersion: 2.6.22 | |
16 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
17 | Christoph Lameter <cl@linux-foundation.org> | |
18 | Description: | |
19 | The aliases file is read-only and specifies how many caches | |
20 | have merged into this cache. | |
21 | ||
22 | What: /sys/kernel/slab/cache/align | |
23 | Date: May 2007 | |
24 | KernelVersion: 2.6.22 | |
25 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
26 | Christoph Lameter <cl@linux-foundation.org> | |
27 | Description: | |
28 | The align file is read-only and specifies the cache's object | |
29 | alignment in bytes. | |
30 | ||
31 | What: /sys/kernel/slab/cache/alloc_calls | |
32 | Date: May 2007 | |
33 | KernelVersion: 2.6.22 | |
34 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
35 | Christoph Lameter <cl@linux-foundation.org> | |
36 | Description: | |
37 | The alloc_calls file is read-only and lists the kernel code | |
38 | locations from which allocations for this cache were performed. | |
39 | The alloc_calls file only contains information if debugging is | |
40 | enabled for that cache (see Documentation/vm/slub.txt). | |
41 | ||
42 | What: /sys/kernel/slab/cache/alloc_fastpath | |
43 | Date: February 2008 | |
44 | KernelVersion: 2.6.25 | |
45 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
46 | Christoph Lameter <cl@linux-foundation.org> | |
47 | Description: | |
78eb00cc DR |
48 | The alloc_fastpath file shows how many objects have been |
49 | allocated using the fast path. It can be written to clear the | |
50 | current count. | |
51e95bed DR |
51 | Available when CONFIG_SLUB_STATS is enabled. |
52 | ||
53 | What: /sys/kernel/slab/cache/alloc_from_partial | |
54 | Date: February 2008 | |
55 | KernelVersion: 2.6.25 | |
56 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
57 | Christoph Lameter <cl@linux-foundation.org> | |
58 | Description: | |
78eb00cc DR |
59 | The alloc_from_partial file shows how many times a cpu slab has |
60 | been full and it has been refilled by using a slab from the list | |
61 | of partially used slabs. It can be written to clear the current | |
62 | count. | |
51e95bed DR |
63 | Available when CONFIG_SLUB_STATS is enabled. |
64 | ||
65 | What: /sys/kernel/slab/cache/alloc_refill | |
66 | Date: February 2008 | |
67 | KernelVersion: 2.6.25 | |
68 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
69 | Christoph Lameter <cl@linux-foundation.org> | |
70 | Description: | |
78eb00cc DR |
71 | The alloc_refill file shows how many times the per-cpu freelist |
72 | was empty but there were objects available as the result of | |
73 | remote cpu frees. It can be written to clear the current count. | |
51e95bed DR |
74 | Available when CONFIG_SLUB_STATS is enabled. |
75 | ||
76 | What: /sys/kernel/slab/cache/alloc_slab | |
77 | Date: February 2008 | |
78 | KernelVersion: 2.6.25 | |
79 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
80 | Christoph Lameter <cl@linux-foundation.org> | |
81 | Description: | |
78eb00cc DR |
82 | The alloc_slab file is shows how many times a new slab had to |
83 | be allocated from the page allocator. It can be written to | |
84 | clear the current count. | |
51e95bed DR |
85 | Available when CONFIG_SLUB_STATS is enabled. |
86 | ||
87 | What: /sys/kernel/slab/cache/alloc_slowpath | |
88 | Date: February 2008 | |
89 | KernelVersion: 2.6.25 | |
90 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
91 | Christoph Lameter <cl@linux-foundation.org> | |
92 | Description: | |
78eb00cc DR |
93 | The alloc_slowpath file shows how many objects have been |
94 | allocated using the slow path because of a refill or | |
95 | allocation from a partial or new slab. It can be written to | |
96 | clear the current count. | |
51e95bed DR |
97 | Available when CONFIG_SLUB_STATS is enabled. |
98 | ||
99 | What: /sys/kernel/slab/cache/cache_dma | |
100 | Date: May 2007 | |
101 | KernelVersion: 2.6.22 | |
102 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
103 | Christoph Lameter <cl@linux-foundation.org> | |
104 | Description: | |
105 | The cache_dma file is read-only and specifies whether objects | |
106 | are from ZONE_DMA. | |
107 | Available when CONFIG_ZONE_DMA is enabled. | |
108 | ||
109 | What: /sys/kernel/slab/cache/cpu_slabs | |
110 | Date: May 2007 | |
111 | KernelVersion: 2.6.22 | |
112 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
113 | Christoph Lameter <cl@linux-foundation.org> | |
114 | Description: | |
115 | The cpu_slabs file is read-only and displays how many cpu slabs | |
116 | are active and their NUMA locality. | |
117 | ||
118 | What: /sys/kernel/slab/cache/cpuslab_flush | |
119 | Date: April 2009 | |
120 | KernelVersion: 2.6.31 | |
121 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
122 | Christoph Lameter <cl@linux-foundation.org> | |
123 | Description: | |
78eb00cc DR |
124 | The file cpuslab_flush shows how many times a cache's cpu slabs |
125 | have been flushed as the result of destroying or shrinking a | |
126 | cache, a cpu going offline, or as the result of forcing an | |
127 | allocation from a certain node. It can be written to clear the | |
128 | current count. | |
51e95bed DR |
129 | Available when CONFIG_SLUB_STATS is enabled. |
130 | ||
131 | What: /sys/kernel/slab/cache/ctor | |
132 | Date: May 2007 | |
133 | KernelVersion: 2.6.22 | |
134 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
135 | Christoph Lameter <cl@linux-foundation.org> | |
136 | Description: | |
137 | The ctor file is read-only and specifies the cache's object | |
138 | constructor function, which is invoked for each object when a | |
139 | new slab is allocated. | |
140 | ||
141 | What: /sys/kernel/slab/cache/deactivate_empty | |
142 | Date: February 2008 | |
143 | KernelVersion: 2.6.25 | |
144 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
145 | Christoph Lameter <cl@linux-foundation.org> | |
146 | Description: | |
78eb00cc DR |
147 | The deactivate_empty file shows how many times an empty cpu slab |
148 | was deactivated. It can be written to clear the current count. | |
51e95bed DR |
149 | Available when CONFIG_SLUB_STATS is enabled. |
150 | ||
151 | What: /sys/kernel/slab/cache/deactivate_full | |
152 | Date: February 2008 | |
153 | KernelVersion: 2.6.25 | |
154 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
155 | Christoph Lameter <cl@linux-foundation.org> | |
156 | Description: | |
78eb00cc DR |
157 | The deactivate_full file shows how many times a full cpu slab |
158 | was deactivated. It can be written to clear the current count. | |
51e95bed DR |
159 | Available when CONFIG_SLUB_STATS is enabled. |
160 | ||
161 | What: /sys/kernel/slab/cache/deactivate_remote_frees | |
162 | Date: February 2008 | |
163 | KernelVersion: 2.6.25 | |
164 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
165 | Christoph Lameter <cl@linux-foundation.org> | |
166 | Description: | |
78eb00cc DR |
167 | The deactivate_remote_frees file shows how many times a cpu slab |
168 | has been deactivated and contained free objects that were freed | |
169 | remotely. It can be written to clear the current count. | |
51e95bed DR |
170 | Available when CONFIG_SLUB_STATS is enabled. |
171 | ||
172 | What: /sys/kernel/slab/cache/deactivate_to_head | |
173 | Date: February 2008 | |
174 | KernelVersion: 2.6.25 | |
175 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
176 | Christoph Lameter <cl@linux-foundation.org> | |
177 | Description: | |
78eb00cc DR |
178 | The deactivate_to_head file shows how many times a partial cpu |
179 | slab was deactivated and added to the head of its node's partial | |
180 | list. It can be written to clear the current count. | |
51e95bed DR |
181 | Available when CONFIG_SLUB_STATS is enabled. |
182 | ||
183 | What: /sys/kernel/slab/cache/deactivate_to_tail | |
184 | Date: February 2008 | |
185 | KernelVersion: 2.6.25 | |
186 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
187 | Christoph Lameter <cl@linux-foundation.org> | |
188 | Description: | |
78eb00cc DR |
189 | The deactivate_to_tail file shows how many times a partial cpu |
190 | slab was deactivated and added to the tail of its node's partial | |
191 | list. It can be written to clear the current count. | |
51e95bed DR |
192 | Available when CONFIG_SLUB_STATS is enabled. |
193 | ||
194 | What: /sys/kernel/slab/cache/destroy_by_rcu | |
195 | Date: May 2007 | |
196 | KernelVersion: 2.6.22 | |
197 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
198 | Christoph Lameter <cl@linux-foundation.org> | |
199 | Description: | |
200 | The destroy_by_rcu file is read-only and specifies whether | |
201 | slabs (not objects) are freed by rcu. | |
202 | ||
203 | What: /sys/kernel/slab/cache/free_add_partial | |
204 | Date: February 2008 | |
205 | KernelVersion: 2.6.25 | |
206 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
207 | Christoph Lameter <cl@linux-foundation.org> | |
208 | Description: | |
78eb00cc DR |
209 | The free_add_partial file shows how many times an object has |
210 | been freed in a full slab so that it had to added to its node's | |
211 | partial list. It can be written to clear the current count. | |
51e95bed DR |
212 | Available when CONFIG_SLUB_STATS is enabled. |
213 | ||
214 | What: /sys/kernel/slab/cache/free_calls | |
215 | Date: May 2007 | |
216 | KernelVersion: 2.6.22 | |
217 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
218 | Christoph Lameter <cl@linux-foundation.org> | |
219 | Description: | |
220 | The free_calls file is read-only and lists the locations of | |
221 | object frees if slab debugging is enabled (see | |
222 | Documentation/vm/slub.txt). | |
223 | ||
224 | What: /sys/kernel/slab/cache/free_fastpath | |
225 | Date: February 2008 | |
226 | KernelVersion: 2.6.25 | |
227 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
228 | Christoph Lameter <cl@linux-foundation.org> | |
229 | Description: | |
78eb00cc DR |
230 | The free_fastpath file shows how many objects have been freed |
231 | using the fast path because it was an object from the cpu slab. | |
232 | It can be written to clear the current count. | |
51e95bed DR |
233 | Available when CONFIG_SLUB_STATS is enabled. |
234 | ||
235 | What: /sys/kernel/slab/cache/free_frozen | |
236 | Date: February 2008 | |
237 | KernelVersion: 2.6.25 | |
238 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
239 | Christoph Lameter <cl@linux-foundation.org> | |
240 | Description: | |
78eb00cc DR |
241 | The free_frozen file shows how many objects have been freed to |
242 | a frozen slab (i.e. a remote cpu slab). It can be written to | |
243 | clear the current count. | |
51e95bed DR |
244 | Available when CONFIG_SLUB_STATS is enabled. |
245 | ||
246 | What: /sys/kernel/slab/cache/free_remove_partial | |
247 | Date: February 2008 | |
248 | KernelVersion: 2.6.25 | |
249 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
250 | Christoph Lameter <cl@linux-foundation.org> | |
251 | Description: | |
78eb00cc DR |
252 | The free_remove_partial file shows how many times an object has |
253 | been freed to a now-empty slab so that it had to be removed from | |
254 | its node's partial list. It can be written to clear the current | |
255 | count. | |
51e95bed DR |
256 | Available when CONFIG_SLUB_STATS is enabled. |
257 | ||
258 | What: /sys/kernel/slab/cache/free_slab | |
259 | Date: February 2008 | |
260 | KernelVersion: 2.6.25 | |
261 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
262 | Christoph Lameter <cl@linux-foundation.org> | |
263 | Description: | |
78eb00cc DR |
264 | The free_slab file shows how many times an empty slab has been |
265 | freed back to the page allocator. It can be written to clear | |
266 | the current count. | |
51e95bed DR |
267 | Available when CONFIG_SLUB_STATS is enabled. |
268 | ||
269 | What: /sys/kernel/slab/cache/free_slowpath | |
270 | Date: February 2008 | |
271 | KernelVersion: 2.6.25 | |
272 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
273 | Christoph Lameter <cl@linux-foundation.org> | |
274 | Description: | |
78eb00cc DR |
275 | The free_slowpath file shows how many objects have been freed |
276 | using the slow path (i.e. to a full or partial slab). It can | |
277 | be written to clear the current count. | |
51e95bed DR |
278 | Available when CONFIG_SLUB_STATS is enabled. |
279 | ||
280 | What: /sys/kernel/slab/cache/hwcache_align | |
281 | Date: May 2007 | |
282 | KernelVersion: 2.6.22 | |
283 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
284 | Christoph Lameter <cl@linux-foundation.org> | |
285 | Description: | |
286 | The hwcache_align file is read-only and specifies whether | |
287 | objects are aligned on cachelines. | |
288 | ||
289 | What: /sys/kernel/slab/cache/min_partial | |
290 | Date: February 2009 | |
291 | KernelVersion: 2.6.30 | |
292 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
293 | David Rientjes <rientjes@google.com> | |
294 | Description: | |
295 | The min_partial file specifies how many empty slabs shall | |
296 | remain on a node's partial list to avoid the overhead of | |
297 | allocating new slabs. Such slabs may be reclaimed by utilizing | |
298 | the shrink file. | |
299 | ||
300 | What: /sys/kernel/slab/cache/object_size | |
301 | Date: May 2007 | |
302 | KernelVersion: 2.6.22 | |
303 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
304 | Christoph Lameter <cl@linux-foundation.org> | |
305 | Description: | |
306 | The object_size file is read-only and specifies the cache's | |
307 | object size. | |
308 | ||
309 | What: /sys/kernel/slab/cache/objects | |
310 | Date: May 2007 | |
311 | KernelVersion: 2.6.22 | |
312 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
313 | Christoph Lameter <cl@linux-foundation.org> | |
314 | Description: | |
315 | The objects file is read-only and displays how many objects are | |
316 | active and from which nodes they are from. | |
317 | ||
318 | What: /sys/kernel/slab/cache/objects_partial | |
319 | Date: April 2008 | |
320 | KernelVersion: 2.6.26 | |
321 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
322 | Christoph Lameter <cl@linux-foundation.org> | |
323 | Description: | |
324 | The objects_partial file is read-only and displays how many | |
325 | objects are on partial slabs and from which nodes they are | |
326 | from. | |
327 | ||
328 | What: /sys/kernel/slab/cache/objs_per_slab | |
329 | Date: May 2007 | |
330 | KernelVersion: 2.6.22 | |
331 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
332 | Christoph Lameter <cl@linux-foundation.org> | |
333 | Description: | |
334 | The file objs_per_slab is read-only and specifies how many | |
335 | objects may be allocated from a single slab of the order | |
336 | specified in /sys/kernel/slab/cache/order. | |
337 | ||
338 | What: /sys/kernel/slab/cache/order | |
339 | Date: May 2007 | |
340 | KernelVersion: 2.6.22 | |
341 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
342 | Christoph Lameter <cl@linux-foundation.org> | |
343 | Description: | |
344 | The order file specifies the page order at which new slabs are | |
345 | allocated. It is writable and can be changed to increase the | |
346 | number of objects per slab. If a slab cannot be allocated | |
347 | because of fragmentation, SLUB will retry with the minimum order | |
348 | possible depending on its characteristics. | |
888a214d | 349 | When debug_guardpage_minorder=N (N > 0) parameter is specified |
8c27ceff | 350 | (see Documentation/admin-guide/kernel-parameters.rst), the minimum possible |
888a214d SG |
351 | order is used and this sysfs entry can not be used to change |
352 | the order at run time. | |
51e95bed DR |
353 | |
354 | What: /sys/kernel/slab/cache/order_fallback | |
355 | Date: April 2008 | |
356 | KernelVersion: 2.6.26 | |
357 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
358 | Christoph Lameter <cl@linux-foundation.org> | |
359 | Description: | |
78eb00cc DR |
360 | The order_fallback file shows how many times an allocation of a |
361 | new slab has not been possible at the cache's order and instead | |
362 | fallen back to its minimum possible order. It can be written to | |
363 | clear the current count. | |
51e95bed DR |
364 | Available when CONFIG_SLUB_STATS is enabled. |
365 | ||
366 | What: /sys/kernel/slab/cache/partial | |
367 | Date: May 2007 | |
368 | KernelVersion: 2.6.22 | |
369 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
370 | Christoph Lameter <cl@linux-foundation.org> | |
371 | Description: | |
372 | The partial file is read-only and displays how long many | |
373 | partial slabs there are and how long each node's list is. | |
374 | ||
375 | What: /sys/kernel/slab/cache/poison | |
376 | Date: May 2007 | |
377 | KernelVersion: 2.6.22 | |
378 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
379 | Christoph Lameter <cl@linux-foundation.org> | |
380 | Description: | |
381 | The poison file specifies whether objects should be poisoned | |
382 | when a new slab is allocated. | |
383 | ||
384 | What: /sys/kernel/slab/cache/reclaim_account | |
385 | Date: May 2007 | |
386 | KernelVersion: 2.6.22 | |
387 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
388 | Christoph Lameter <cl@linux-foundation.org> | |
389 | Description: | |
390 | The reclaim_account file specifies whether the cache's objects | |
391 | are reclaimable (and grouped by their mobility). | |
392 | ||
393 | What: /sys/kernel/slab/cache/red_zone | |
394 | Date: May 2007 | |
395 | KernelVersion: 2.6.22 | |
396 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
397 | Christoph Lameter <cl@linux-foundation.org> | |
398 | Description: | |
399 | The red_zone file specifies whether the cache's objects are red | |
400 | zoned. | |
401 | ||
402 | What: /sys/kernel/slab/cache/remote_node_defrag_ratio | |
403 | Date: January 2008 | |
404 | KernelVersion: 2.6.25 | |
405 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
406 | Christoph Lameter <cl@linux-foundation.org> | |
407 | Description: | |
408 | The file remote_node_defrag_ratio specifies the percentage of | |
409 | times SLUB will attempt to refill the cpu slab with a partial | |
410 | slab from a remote node as opposed to allocating a new slab on | |
411 | the local node. This reduces the amount of wasted memory over | |
412 | the entire system but can be expensive. | |
413 | Available when CONFIG_NUMA is enabled. | |
414 | ||
415 | What: /sys/kernel/slab/cache/sanity_checks | |
416 | Date: May 2007 | |
417 | KernelVersion: 2.6.22 | |
418 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
419 | Christoph Lameter <cl@linux-foundation.org> | |
420 | Description: | |
421 | The sanity_checks file specifies whether expensive checks | |
422 | should be performed on free and, at minimum, enables double free | |
423 | checks. Caches that enable sanity_checks cannot be merged with | |
424 | caches that do not. | |
425 | ||
426 | What: /sys/kernel/slab/cache/shrink | |
427 | Date: May 2007 | |
428 | KernelVersion: 2.6.22 | |
429 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
430 | Christoph Lameter <cl@linux-foundation.org> | |
431 | Description: | |
432 | The shrink file is written when memory should be reclaimed from | |
433 | a cache. Empty partial slabs are freed and the partial list is | |
434 | sorted so the slabs with the fewest available objects are used | |
435 | first. | |
436 | ||
437 | What: /sys/kernel/slab/cache/slab_size | |
438 | Date: May 2007 | |
439 | KernelVersion: 2.6.22 | |
440 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
441 | Christoph Lameter <cl@linux-foundation.org> | |
442 | Description: | |
443 | The slab_size file is read-only and specifies the object size | |
444 | with metadata (debugging information and alignment) in bytes. | |
445 | ||
446 | What: /sys/kernel/slab/cache/slabs | |
447 | Date: May 2007 | |
448 | KernelVersion: 2.6.22 | |
449 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
450 | Christoph Lameter <cl@linux-foundation.org> | |
451 | Description: | |
452 | The slabs file is read-only and displays how long many slabs | |
453 | there are (both cpu and partial) and from which nodes they are | |
454 | from. | |
455 | ||
456 | What: /sys/kernel/slab/cache/store_user | |
457 | Date: May 2007 | |
458 | KernelVersion: 2.6.22 | |
459 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
460 | Christoph Lameter <cl@linux-foundation.org> | |
461 | Description: | |
462 | The store_user file specifies whether the location of | |
463 | allocation or free should be tracked for a cache. | |
464 | ||
465 | What: /sys/kernel/slab/cache/total_objects | |
466 | Date: April 2008 | |
467 | KernelVersion: 2.6.26 | |
468 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
469 | Christoph Lameter <cl@linux-foundation.org> | |
470 | Description: | |
471 | The total_objects file is read-only and displays how many total | |
472 | objects a cache has and from which nodes they are from. | |
473 | ||
474 | What: /sys/kernel/slab/cache/trace | |
475 | Date: May 2007 | |
476 | KernelVersion: 2.6.22 | |
477 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
478 | Christoph Lameter <cl@linux-foundation.org> | |
479 | Description: | |
480 | The trace file specifies whether object allocations and frees | |
481 | should be traced. | |
482 | ||
483 | What: /sys/kernel/slab/cache/validate | |
484 | Date: May 2007 | |
485 | KernelVersion: 2.6.22 | |
486 | Contact: Pekka Enberg <penberg@cs.helsinki.fi>, | |
487 | Christoph Lameter <cl@linux-foundation.org> | |
488 | Description: | |
489 | Writing to the validate file causes SLUB to traverse all of its | |
490 | cache's objects and check the validity of metadata. |