blob: b68536cc9046ec937b9b4ccddb98b2acf468f1db [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/fs/nfs/pagelist.c
3 *
4 * A set of helper functions for managing NFS read and write requests.
5 * The main purpose of these routines is to provide support for the
6 * coalescing of several requests into a single RPC call.
7 *
8 * Copyright 2000, 2001 (c) Trond Myklebust <trond.myklebust@fys.uio.no>
9 *
10 */
11
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/slab.h>
13#include <linux/file.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040014#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/sunrpc/clnt.h>
16#include <linux/nfs3.h>
17#include <linux/nfs4.h>
18#include <linux/nfs_page.h>
19#include <linux/nfs_fs.h>
20#include <linux/nfs_mount.h>
21
Trond Myklebust8d5658c2007-04-10 09:26:35 -040022#include "internal.h"
23
Christoph Lametere18b8902006-12-06 20:33:20 -080024static struct kmem_cache *nfs_page_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -070025
26static inline struct nfs_page *
27nfs_page_alloc(void)
28{
29 struct nfs_page *p;
Christoph Lametere94b1762006-12-06 20:33:17 -080030 p = kmem_cache_alloc(nfs_page_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -070031 if (p) {
32 memset(p, 0, sizeof(*p));
33 INIT_LIST_HEAD(&p->wb_list);
34 }
35 return p;
36}
37
38static inline void
39nfs_page_free(struct nfs_page *p)
40{
41 kmem_cache_free(nfs_page_cachep, p);
42}
43
44/**
45 * nfs_create_request - Create an NFS read/write request.
46 * @file: file descriptor to use
47 * @inode: inode to which the request is attached
48 * @page: page to write
49 * @offset: starting offset within the page for the write
50 * @count: number of bytes to read/write
51 *
52 * The page must be locked by the caller. This makes sure we never
Jason Uhlenkotta19b89c2007-04-26 17:25:51 -070053 * create two different requests for the same page.
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 * User should ensure it is safe to sleep in this function.
55 */
56struct nfs_page *
57nfs_create_request(struct nfs_open_context *ctx, struct inode *inode,
58 struct page *page,
59 unsigned int offset, unsigned int count)
60{
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 struct nfs_page *req;
62
Trond Myklebust18eb8842010-05-13 12:51:02 -040063 /* try to allocate the request struct */
64 req = nfs_page_alloc();
65 if (req == NULL)
66 return ERR_PTR(-ENOMEM);
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
Jeff Layton015f0212010-10-28 10:10:37 -040068 /* get lock context early so we can deal with alloc failures */
69 req->wb_lock_context = nfs_get_lock_context(ctx);
70 if (req->wb_lock_context == NULL) {
71 nfs_page_free(req);
72 return ERR_PTR(-ENOMEM);
73 }
74
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 /* Initialize the request struct. Initially, we assume a
76 * long write-back delay. This will be adjusted in
77 * update_nfs_request below if the region is not locked. */
78 req->wb_page = page;
79 atomic_set(&req->wb_complete, 0);
80 req->wb_index = page->index;
81 page_cache_get(page);
Trond Myklebustcd52ed32006-03-20 13:44:04 -050082 BUG_ON(PagePrivate(page));
83 BUG_ON(!PageLocked(page));
84 BUG_ON(page->mapping->host != inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 req->wb_offset = offset;
86 req->wb_pgbase = offset;
87 req->wb_bytes = count;
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 req->wb_context = get_nfs_open_context(ctx);
Trond Myklebustc03b4022007-06-17 13:26:38 -040089 kref_init(&req->wb_kref);
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 return req;
91}
92
93/**
94 * nfs_unlock_request - Unlock request and wake up sleepers.
95 * @req:
96 */
97void nfs_unlock_request(struct nfs_page *req)
98{
99 if (!NFS_WBACK_BUSY(req)) {
100 printk(KERN_ERR "NFS: Invalid unlock attempted\n");
101 BUG();
102 }
103 smp_mb__before_clear_bit();
104 clear_bit(PG_BUSY, &req->wb_flags);
105 smp_mb__after_clear_bit();
Trond Myklebust464a98b2005-06-22 17:16:21 +0000106 wake_up_bit(&req->wb_flags, PG_BUSY);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 nfs_release_request(req);
108}
109
110/**
Trond Myklebust9fd367f2007-06-17 15:10:24 -0400111 * nfs_set_page_tag_locked - Tag a request as locked
Trond Myklebustc6a556b2005-06-22 17:16:30 +0000112 * @req:
113 */
Trond Myklebustacee4782008-01-22 17:13:07 -0500114int nfs_set_page_tag_locked(struct nfs_page *req)
Trond Myklebustc6a556b2005-06-22 17:16:30 +0000115{
Trond Myklebustacee4782008-01-22 17:13:07 -0500116 if (!nfs_lock_request_dontget(req))
Trond Myklebustc6a556b2005-06-22 17:16:30 +0000117 return 0;
Trond Myklebust2df485a2010-12-07 22:39:17 -0500118 if (test_bit(PG_MAPPED, &req->wb_flags))
Trond Myklebustbb6fbc42010-03-11 09:19:35 -0500119 radix_tree_tag_set(&NFS_I(req->wb_context->path.dentry->d_inode)->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_LOCKED);
Trond Myklebustc6a556b2005-06-22 17:16:30 +0000120 return 1;
121}
122
123/**
Trond Myklebust9fd367f2007-06-17 15:10:24 -0400124 * nfs_clear_page_tag_locked - Clear request tag and wake up sleepers
Trond Myklebustc6a556b2005-06-22 17:16:30 +0000125 */
Trond Myklebust9fd367f2007-06-17 15:10:24 -0400126void nfs_clear_page_tag_locked(struct nfs_page *req)
Trond Myklebustc6a556b2005-06-22 17:16:30 +0000127{
Trond Myklebust2df485a2010-12-07 22:39:17 -0500128 if (test_bit(PG_MAPPED, &req->wb_flags)) {
Trond Myklebustbb6fbc42010-03-11 09:19:35 -0500129 struct inode *inode = req->wb_context->path.dentry->d_inode;
130 struct nfs_inode *nfsi = NFS_I(inode);
131
Trond Myklebust587142f2007-07-02 09:57:54 -0400132 spin_lock(&inode->i_lock);
Trond Myklebust9fd367f2007-06-17 15:10:24 -0400133 radix_tree_tag_clear(&nfsi->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_LOCKED);
Trond Myklebustacee4782008-01-22 17:13:07 -0500134 nfs_unlock_request(req);
Trond Myklebust587142f2007-07-02 09:57:54 -0400135 spin_unlock(&inode->i_lock);
Trond Myklebustacee4782008-01-22 17:13:07 -0500136 } else
137 nfs_unlock_request(req);
Trond Myklebustc6a556b2005-06-22 17:16:30 +0000138}
139
140/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 * nfs_clear_request - Free up all resources allocated to the request
142 * @req:
143 *
Trond Myklebustbb6fbc42010-03-11 09:19:35 -0500144 * Release page and open context resources associated with a read/write
145 * request after it has completed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 */
147void nfs_clear_request(struct nfs_page *req)
148{
Trond Myklebustcd52ed32006-03-20 13:44:04 -0500149 struct page *page = req->wb_page;
Trond Myklebustbb6fbc42010-03-11 09:19:35 -0500150 struct nfs_open_context *ctx = req->wb_context;
Trond Myklebustf11ac8d2010-06-25 16:35:53 -0400151 struct nfs_lock_context *l_ctx = req->wb_lock_context;
Trond Myklebustbb6fbc42010-03-11 09:19:35 -0500152
Trond Myklebustcd52ed32006-03-20 13:44:04 -0500153 if (page != NULL) {
Trond Myklebustcd52ed32006-03-20 13:44:04 -0500154 page_cache_release(page);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 req->wb_page = NULL;
156 }
Trond Myklebustf11ac8d2010-06-25 16:35:53 -0400157 if (l_ctx != NULL) {
158 nfs_put_lock_context(l_ctx);
159 req->wb_lock_context = NULL;
160 }
Trond Myklebustbb6fbc42010-03-11 09:19:35 -0500161 if (ctx != NULL) {
162 put_nfs_open_context(ctx);
163 req->wb_context = NULL;
164 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165}
166
167
168/**
169 * nfs_release_request - Release the count on an NFS read/write request
170 * @req: request to release
171 *
172 * Note: Should never be called with the spinlock held!
173 */
Trond Myklebustc03b4022007-06-17 13:26:38 -0400174static void nfs_free_request(struct kref *kref)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175{
Trond Myklebustc03b4022007-06-17 13:26:38 -0400176 struct nfs_page *req = container_of(kref, struct nfs_page, wb_kref);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177
Trond Myklebustbb6fbc42010-03-11 09:19:35 -0500178 /* Release struct file and open context */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 nfs_clear_request(req);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 nfs_page_free(req);
181}
182
Trond Myklebustc03b4022007-06-17 13:26:38 -0400183void nfs_release_request(struct nfs_page *req)
184{
185 kref_put(&req->wb_kref, nfs_free_request);
186}
187
Trond Myklebust9f557cd2010-02-03 08:27:22 -0500188static int nfs_wait_bit_uninterruptible(void *word)
189{
190 io_schedule();
191 return 0;
192}
193
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194/**
195 * nfs_wait_on_request - Wait for a request to complete.
196 * @req: request to wait upon.
197 *
Matthew Wilcox150030b2007-12-06 16:24:39 -0500198 * Interruptible by fatal signals only.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 * The user is responsible for holding a count on the request.
200 */
201int
202nfs_wait_on_request(struct nfs_page *req)
203{
Trond Myklebust9f557cd2010-02-03 08:27:22 -0500204 return wait_on_bit(&req->wb_flags, PG_BUSY,
205 nfs_wait_bit_uninterruptible,
206 TASK_UNINTERRUPTIBLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207}
208
209/**
Trond Myklebustd8a5ad72007-04-02 18:48:28 -0400210 * nfs_pageio_init - initialise a page io descriptor
211 * @desc: pointer to descriptor
Trond Myklebustbcb71bb2007-04-02 18:48:28 -0400212 * @inode: pointer to inode
213 * @doio: pointer to io function
214 * @bsize: io block size
215 * @io_flags: extra parameters for the io function
Trond Myklebustd8a5ad72007-04-02 18:48:28 -0400216 */
Trond Myklebustbcb71bb2007-04-02 18:48:28 -0400217void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
218 struct inode *inode,
Trond Myklebust8d5658c2007-04-10 09:26:35 -0400219 int (*doio)(struct inode *, struct list_head *, unsigned int, size_t, int),
Trond Myklebust84dde762007-05-04 14:44:06 -0400220 size_t bsize,
Trond Myklebustbcb71bb2007-04-02 18:48:28 -0400221 int io_flags)
Trond Myklebustd8a5ad72007-04-02 18:48:28 -0400222{
223 INIT_LIST_HEAD(&desc->pg_list);
Trond Myklebustbcb71bb2007-04-02 18:48:28 -0400224 desc->pg_bytes_written = 0;
Trond Myklebustd8a5ad72007-04-02 18:48:28 -0400225 desc->pg_count = 0;
226 desc->pg_bsize = bsize;
227 desc->pg_base = 0;
Trond Myklebustbcb71bb2007-04-02 18:48:28 -0400228 desc->pg_inode = inode;
229 desc->pg_doio = doio;
230 desc->pg_ioflags = io_flags;
231 desc->pg_error = 0;
Trond Myklebustd8a5ad72007-04-02 18:48:28 -0400232}
233
234/**
235 * nfs_can_coalesce_requests - test two requests for compatibility
236 * @prev: pointer to nfs_page
237 * @req: pointer to nfs_page
238 *
239 * The nfs_page structures 'prev' and 'req' are compared to ensure that the
240 * page data area they describe is contiguous, and that their RPC
241 * credentials, NFSv4 open state, and lockowners are the same.
242 *
243 * Return 'true' if this is the case, else return 'false'.
244 */
245static int nfs_can_coalesce_requests(struct nfs_page *prev,
246 struct nfs_page *req)
247{
248 if (req->wb_context->cred != prev->wb_context->cred)
249 return 0;
Trond Myklebustf11ac8d2010-06-25 16:35:53 -0400250 if (req->wb_lock_context->lockowner != prev->wb_lock_context->lockowner)
Trond Myklebustd8a5ad72007-04-02 18:48:28 -0400251 return 0;
252 if (req->wb_context->state != prev->wb_context->state)
253 return 0;
254 if (req->wb_index != (prev->wb_index + 1))
255 return 0;
256 if (req->wb_pgbase != 0)
257 return 0;
258 if (prev->wb_pgbase + prev->wb_bytes != PAGE_CACHE_SIZE)
259 return 0;
260 return 1;
261}
262
263/**
Trond Myklebustbcb71bb2007-04-02 18:48:28 -0400264 * nfs_pageio_do_add_request - Attempt to coalesce a request into a page list.
Trond Myklebustd8a5ad72007-04-02 18:48:28 -0400265 * @desc: destination io descriptor
266 * @req: request
267 *
268 * Returns true if the request 'req' was successfully coalesced into the
269 * existing list of pages 'desc'.
270 */
Trond Myklebustbcb71bb2007-04-02 18:48:28 -0400271static int nfs_pageio_do_add_request(struct nfs_pageio_descriptor *desc,
272 struct nfs_page *req)
Trond Myklebustd8a5ad72007-04-02 18:48:28 -0400273{
274 size_t newlen = req->wb_bytes;
275
276 if (desc->pg_count != 0) {
277 struct nfs_page *prev;
278
279 /*
280 * FIXME: ideally we should be able to coalesce all requests
281 * that are not block boundary aligned, but currently this
282 * is problematic for the case of bsize < PAGE_CACHE_SIZE,
283 * since nfs_flush_multi and nfs_pagein_multi assume you
284 * can have only one struct nfs_page.
285 */
Trond Myklebust8d5658c2007-04-10 09:26:35 -0400286 if (desc->pg_bsize < PAGE_SIZE)
287 return 0;
Trond Myklebustd8a5ad72007-04-02 18:48:28 -0400288 newlen += desc->pg_count;
Trond Myklebust8d5658c2007-04-10 09:26:35 -0400289 if (newlen > desc->pg_bsize)
Trond Myklebustd8a5ad72007-04-02 18:48:28 -0400290 return 0;
291 prev = nfs_list_entry(desc->pg_list.prev);
292 if (!nfs_can_coalesce_requests(prev, req))
293 return 0;
294 } else
295 desc->pg_base = req->wb_pgbase;
296 nfs_list_remove_request(req);
297 nfs_list_add_request(req, &desc->pg_list);
298 desc->pg_count = newlen;
299 return 1;
300}
301
Trond Myklebustbcb71bb2007-04-02 18:48:28 -0400302/*
303 * Helper for nfs_pageio_add_request and nfs_pageio_complete
304 */
305static void nfs_pageio_doio(struct nfs_pageio_descriptor *desc)
306{
307 if (!list_empty(&desc->pg_list)) {
308 int error = desc->pg_doio(desc->pg_inode,
309 &desc->pg_list,
Trond Myklebust8d5658c2007-04-10 09:26:35 -0400310 nfs_page_array_len(desc->pg_base,
311 desc->pg_count),
Trond Myklebustbcb71bb2007-04-02 18:48:28 -0400312 desc->pg_count,
313 desc->pg_ioflags);
314 if (error < 0)
315 desc->pg_error = error;
316 else
317 desc->pg_bytes_written += desc->pg_count;
318 }
319 if (list_empty(&desc->pg_list)) {
320 desc->pg_count = 0;
321 desc->pg_base = 0;
322 }
323}
324
325/**
326 * nfs_pageio_add_request - Attempt to coalesce a request into a page list.
327 * @desc: destination io descriptor
328 * @req: request
329 *
330 * Returns true if the request 'req' was successfully coalesced into the
331 * existing list of pages 'desc'.
332 */
Trond Myklebust8b09bee2007-04-02 18:48:28 -0400333int nfs_pageio_add_request(struct nfs_pageio_descriptor *desc,
334 struct nfs_page *req)
Trond Myklebustbcb71bb2007-04-02 18:48:28 -0400335{
336 while (!nfs_pageio_do_add_request(desc, req)) {
337 nfs_pageio_doio(desc);
338 if (desc->pg_error < 0)
339 return 0;
340 }
341 return 1;
342}
343
Trond Myklebustd8a5ad72007-04-02 18:48:28 -0400344/**
Trond Myklebustbcb71bb2007-04-02 18:48:28 -0400345 * nfs_pageio_complete - Complete I/O on an nfs_pageio_descriptor
346 * @desc: pointer to io descriptor
347 */
348void nfs_pageio_complete(struct nfs_pageio_descriptor *desc)
349{
350 nfs_pageio_doio(desc);
351}
352
Trond Myklebust7fe7f842007-05-20 10:18:27 -0400353/**
354 * nfs_pageio_cond_complete - Conditional I/O completion
355 * @desc: pointer to io descriptor
356 * @index: page index
357 *
358 * It is important to ensure that processes don't try to take locks
359 * on non-contiguous ranges of pages as that might deadlock. This
360 * function should be called before attempting to wait on a locked
361 * nfs_page. It will complete the I/O if the page index 'index'
362 * is not contiguous with the existing list of pages in 'desc'.
363 */
364void nfs_pageio_cond_complete(struct nfs_pageio_descriptor *desc, pgoff_t index)
365{
366 if (!list_empty(&desc->pg_list)) {
367 struct nfs_page *prev = nfs_list_entry(desc->pg_list.prev);
368 if (index != prev->wb_index + 1)
369 nfs_pageio_doio(desc);
370 }
371}
372
Trond Myklebust3da28eb2005-06-22 17:16:31 +0000373#define NFS_SCAN_MAXENTRIES 16
374/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 * nfs_scan_list - Scan a list for matching requests
Trond Myklebustd2ccddf2006-05-31 01:13:38 -0400376 * @nfsi: NFS inode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 * @dst: Destination list
378 * @idx_start: lower bound of page->index to scan
379 * @npages: idx_start + npages sets the upper bound to scan.
Trond Myklebust5c369682007-06-17 15:27:42 -0400380 * @tag: tag to scan for
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 *
382 * Moves elements from one of the inode request lists.
383 * If the number of requests is set to 0, the entire address_space
384 * starting at index idx_start, is scanned.
385 * The requests are *not* checked to ensure that they form a contiguous set.
Trond Myklebust587142f2007-07-02 09:57:54 -0400386 * You must be holding the inode's i_lock when calling this function
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 */
Trond Myklebust5c369682007-06-17 15:27:42 -0400388int nfs_scan_list(struct nfs_inode *nfsi,
Trond Myklebustca52fec2007-04-17 17:22:13 -0400389 struct list_head *dst, pgoff_t idx_start,
Trond Myklebust5c369682007-06-17 15:27:42 -0400390 unsigned int npages, int tag)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391{
Trond Myklebustd2ccddf2006-05-31 01:13:38 -0400392 struct nfs_page *pgvec[NFS_SCAN_MAXENTRIES];
393 struct nfs_page *req;
Trond Myklebustca52fec2007-04-17 17:22:13 -0400394 pgoff_t idx_end;
Trond Myklebustd2ccddf2006-05-31 01:13:38 -0400395 int found, i;
396 int res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397
398 res = 0;
399 if (npages == 0)
400 idx_end = ~0;
401 else
402 idx_end = idx_start + npages - 1;
403
Trond Myklebustd2ccddf2006-05-31 01:13:38 -0400404 for (;;) {
Trond Myklebust5c369682007-06-17 15:27:42 -0400405 found = radix_tree_gang_lookup_tag(&nfsi->nfs_page_tree,
Trond Myklebustd2ccddf2006-05-31 01:13:38 -0400406 (void **)&pgvec[0], idx_start,
Trond Myklebust5c369682007-06-17 15:27:42 -0400407 NFS_SCAN_MAXENTRIES, tag);
Trond Myklebustd2ccddf2006-05-31 01:13:38 -0400408 if (found <= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 break;
Trond Myklebustd2ccddf2006-05-31 01:13:38 -0400410 for (i = 0; i < found; i++) {
411 req = pgvec[i];
412 if (req->wb_index > idx_end)
413 goto out;
414 idx_start = req->wb_index + 1;
Trond Myklebust9fd367f2007-06-17 15:10:24 -0400415 if (nfs_set_page_tag_locked(req)) {
Trond Myklebustacee4782008-01-22 17:13:07 -0500416 kref_get(&req->wb_kref);
Trond Myklebustd2ccddf2006-05-31 01:13:38 -0400417 nfs_list_remove_request(req);
Trond Myklebust5c369682007-06-17 15:27:42 -0400418 radix_tree_tag_clear(&nfsi->nfs_page_tree,
419 req->wb_index, tag);
Trond Myklebustd2ccddf2006-05-31 01:13:38 -0400420 nfs_list_add_request(req, dst);
421 res++;
Trond Myklebustdce34ce2007-06-17 15:47:53 -0400422 if (res == INT_MAX)
423 goto out;
Trond Myklebustd2ccddf2006-05-31 01:13:38 -0400424 }
425 }
Trond Myklebustedc05fc2007-06-17 16:02:34 -0400426 /* for latency reduction */
Trond Myklebust587142f2007-07-02 09:57:54 -0400427 cond_resched_lock(&nfsi->vfs_inode.i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 }
Trond Myklebustd2ccddf2006-05-31 01:13:38 -0400429out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 return res;
431}
432
David Howellsf7b422b2006-06-09 09:34:33 -0400433int __init nfs_init_nfspagecache(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434{
435 nfs_page_cachep = kmem_cache_create("nfs_page",
436 sizeof(struct nfs_page),
437 0, SLAB_HWCACHE_ALIGN,
Paul Mundt20c2df82007-07-20 10:11:58 +0900438 NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 if (nfs_page_cachep == NULL)
440 return -ENOMEM;
441
442 return 0;
443}
444
David Brownell266bee82006-06-27 12:59:15 -0700445void nfs_destroy_nfspagecache(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446{
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700447 kmem_cache_destroy(nfs_page_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448}
449