4 * cc -I/usr/src/sys vmpageinfo.c -o /usr/local/bin/vmpageinfo -lkvm
8 * Validate the vm_page_buckets[] hash array against the vm_page_array
11 * Copyright (c) 2004 The DragonFly Project. All rights reserved.
13 * This code is derived from software contributed to The DragonFly Project
14 * by Matthew Dillon <dillon@backplane.com>
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
20 * 1. Redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer.
22 * 2. Redistributions in binary form must reproduce the above copyright
23 * notice, this list of conditions and the following disclaimer in
24 * the documentation and/or other materials provided with the
26 * 3. Neither the name of The DragonFly Project nor the names of its
27 * contributors may be used to endorse or promote products derived
28 * from this software without specific, prior written permission.
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
31 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
32 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
33 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
34 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
35 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
36 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
37 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
38 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
39 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
40 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
43 * $DragonFly: src/test/debug/vmpageinfo.c,v 1.2 2006/05/23 01:00:05 dillon Exp $
46 #define _KERNEL_STRUCTURES_
47 #include <sys/param.h>
49 #include <sys/malloc.h>
50 #include <sys/signalvar.h>
51 #include <sys/vnode.h>
52 #include <sys/namecache.h>
53 #include <sys/slaballoc.h>
56 #include <vm/vm_page.h>
57 #include <vm/vm_kern.h>
58 #include <vm/vm_page.h>
59 #include <vm/vm_object.h>
60 #include <vm/swap_pager.h>
61 #include <vm/vnode_pager.h>
73 { "_vm_page_buckets" },
74 { "_vm_page_hash_mask" },
77 { "_vm_page_array_size" },
84 struct vm_page
**vm_page_buckets
;
85 int vm_page_hash_mask
;
87 struct vm_page
*vm_page_array
;
88 int vm_page_array_size
;
90 void checkpage(kvm_t
*kd
, vm_page_t mptr
, vm_page_t m
, struct vm_object
*obj
);
91 static void kkread(kvm_t
*kd
, u_long addr
, void *buf
, size_t nbytes
);
92 static int kkread_err(kvm_t
*kd
, u_long addr
, void *buf
, size_t nbytes
);
94 static void addsltrack(vm_page_t m
);
95 static void dumpsltrack(kvm_t
*kd
);
98 main(int ac
, char **av
)
100 const char *corefile
= NULL
;
101 const char *sysfile
= NULL
;
104 struct vm_object obj
;
112 while ((ch
= getopt(ac
, av
, "M:N:dv")) != -1) {
127 fprintf(stderr
, "%s [-M core] [-N system]\n", av
[0]);
134 if ((kd
= kvm_open(sysfile
, corefile
, NULL
, O_RDONLY
, "kvm:")) == NULL
) {
138 if (kvm_nlist(kd
, Nl
) != 0) {
144 kkread(kd
, Nl
[0].n_value
, &vm_page_buckets
, sizeof(vm_page_buckets
));
145 kkread(kd
, Nl
[1].n_value
, &vm_page_hash_mask
, sizeof(vm_page_hash_mask
));
147 kkread(kd
, Nl
[0].n_value
, &vm_page_array
, sizeof(vm_page_array
));
148 kkread(kd
, Nl
[1].n_value
, &vm_page_array_size
, sizeof(vm_page_array_size
));
151 * Scan the vm_page_array validating all pages with associated objects
153 for (i
= 0; i
< vm_page_array_size
; ++i
) {
155 printf("page %d\r", i
);
158 kkread(kd
, (u_long
)&vm_page_array
[i
], &m
, sizeof(m
));
160 kkread(kd
, (u_long
)m
.object
, &obj
, sizeof(obj
));
161 checkpage(kd
, &vm_page_array
[i
], &m
, &obj
);
164 if (m
.queue
>= PQ_HOLD
) {
166 } else if (m
.queue
>= PQ_CACHE
) {
168 } else if (m
.queue
>= PQ_ACTIVE
) {
170 } else if (m
.queue
>= PQ_INACTIVE
) {
172 } else if (m
.queue
>= PQ_FREE
) {
177 printf("page %p obj %p/%-8ju(%016jx) val=%02x dty=%02x hold=%d "
178 "wire=%-2d act=%-3d busy=%d %8s",
182 (intmax_t)m
.pindex
* PAGE_SIZE
,
218 printf(" %-7s", ostr
);
219 if (m
.flags
& PG_BUSY
)
221 if (m
.flags
& PG_WANTED
)
223 if (m
.flags
& PG_WINATCFLS
)
224 printf(" WINATCFLS");
225 if (m
.flags
& PG_FICTITIOUS
)
226 printf(" FICTITIOUS");
227 if (m
.flags
& PG_WRITEABLE
)
228 printf(" WRITEABLE");
229 if (m
.flags
& PG_MAPPED
)
231 if (m
.flags
& PG_ZERO
)
233 if (m
.flags
& PG_REFERENCED
)
234 printf(" REFERENCED");
235 if (m
.flags
& PG_CLEANCHK
)
237 if (m
.flags
& PG_SWAPINPROG
)
238 printf(" SWAPINPROG");
239 if (m
.flags
& PG_NOSYNC
)
241 if (m
.flags
& PG_UNMANAGED
)
242 printf(" UNMANAGED");
243 if (m
.flags
& PG_MARKER
)
245 if (m
.flags
& PG_RAM
)
247 if (m
.flags
& PG_SWAPPED
)
249 if (m
.flags
& PG_SLAB
)
252 if (m
.flags
& PG_SLAB
)
256 if (debugopt
|| verboseopt
)
261 * Scan the vm_page_buckets array validating all pages found
263 for (i
= 0; i
<= vm_page_hash_mask
; ++i
) {
265 printf("index %d\r", i
);
268 kkread(kd
, (u_long
)&vm_page_buckets
[i
], &mptr
, sizeof(mptr
));
270 kkread(kd
, (u_long
)mptr
, &m
, sizeof(m
));
272 kkread(kd
, (u_long
)m
.object
, &obj
, sizeof(obj
));
273 hv
= ((uintptr_t)m
.object
+ m
.pindex
) ^ obj
.hash_rand
;
274 hv
&= vm_page_hash_mask
;
276 printf("vm_page_buckets[%d] ((struct vm_page *)%p)"
277 " should be in bucket %d\n", i
, mptr
, hv
);
278 checkpage(kd
, mptr
, &m
, &obj
);
280 printf("vm_page_buckets[%d] ((struct vm_page *)%p)"
281 " has no object\n", i
, mptr
);
294 * A page with an object.
297 checkpage(kvm_t
*kd
, vm_page_t mptr
, vm_page_t m
, struct vm_object
*obj
)
304 hv
= ((uintptr_t)m
->object
+ m
->pindex
) ^ obj
->hash_rand
;
305 hv
&= vm_page_hash_mask
;
306 kkread(kd
, (u_long
)&vm_page_buckets
[hv
], &scanptr
, sizeof(scanptr
));
310 kkread(kd
, (u_long
)scanptr
, &scan
, sizeof(scan
));
311 scanptr
= scan
.hnext
;
315 printf("good checkpage %p bucket %d\n", mptr
, hv
);
317 printf("vm_page_buckets[%d] ((struct vm_page *)%p)"
318 " page not found in bucket list\n", hv
, mptr
);
324 kkread(kvm_t
*kd
, u_long addr
, void *buf
, size_t nbytes
)
326 if (kvm_read(kd
, addr
, buf
, nbytes
) != nbytes
) {
333 kkread_err(kvm_t
*kd
, u_long addr
, void *buf
, size_t nbytes
)
335 if (kvm_read(kd
, addr
, buf
, nbytes
) != nbytes
) {
342 struct SLTrack
*next
;
347 #define SLHMASK (SLHSIZE - 1)
349 struct SLTrack
*SLHash
[SLHSIZE
];
353 addsltrack(vm_page_t m
)
356 u_long addr
= (m
->pindex
* PAGE_SIZE
) & ~131071L;
359 if (m
->wire_count
== 0 || (m
->flags
& PG_MAPPED
) == 0 ||
363 i
= (addr
/ 131072) & SLHMASK
;
364 for (slt
= SLHash
[i
]; slt
; slt
= slt
->next
) {
365 if (slt
->addr
== addr
)
369 slt
= malloc(sizeof(*slt
));
371 slt
->next
= SLHash
[i
];
378 dumpsltrack(kvm_t
*kd
)
382 long total_zones
= 0;
385 for (i
= 0; i
< SLHSIZE
; ++i
) {
386 for (slt
= SLHash
[i
]; slt
; slt
= slt
->next
) {
389 if (kkread_err(kd
, slt
->addr
, &z
, sizeof(z
))) {
390 printf("SLZone 0x%016lx not mapped\n",
394 printf("SLZone 0x%016lx { mag=%08x cpu=%-2d NFree=%-3d "
407 printf("FullZones/TotalZones: %ld/%ld\n", full_zones
, total_zones
);