2019-04-04 14:54:31

by Pankaj Suryawanshi

[permalink] [raw]
Subject: Re: [External] Re: CMA area pages information


________________________________________
From: Shyam Saini <[email protected]>
Sent: 04 April 2019 19:58
To: Pankaj Suryawanshi
Cc: [email protected]; [email protected]
Subject: [External] Re: CMA area pages information

CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe.



On Thu, Apr 4, 2019 at 7:52 PM Pankaj Suryawanshi <[email protected]<mailto:[email protected]>> wrote:

________________________________________
From: Pankaj Suryawanshi
Sent: 01 April 2019 16:34
To: [email protected]<mailto:[email protected]>; [email protected]<mailto:[email protected]>
Subject: Re: CMA area pages information


________________________________________
From: Pankaj Suryawanshi
Sent: 01 April 2019 13:26
To: [email protected]<mailto:[email protected]>; [email protected]<mailto:[email protected]>
Subject: CMA area pages information

Hello,

Is there any way to get CMA area pages information (tool/application) ?

Trying to get CMA-pages info using /tools/vm/page-types.c

1. Allocate 100 mb using sample app.
2. Try to get page info using page-types.c.

Note: cma base-pfn: 0x60000
cma reserved 1026 Mib

Pages info i got is

./test -p 3401 -L
voffset offset flags
5c1a3 70e92 ___U_lA____M______________________________
5c1a4 73104 ___U_l_____M______________________________
5c1a6 70ad1 ___U_lA____Ma_b___________________________
71ea1 9f470 __RU_l_____M______u_______________________
71ea2 9f471 __RU_l_____M______u_______________________
71ea3 9f472 __RU_l_____M______u_______________________
71ea4 9f473 __RU_l_____M______u_______________________
71ea5 9f485 __RU_l_____M______u_______________________
71ea6 9f486 __RU_l_____M______u_______________________
71ea7 9f487 __RU_l_____M______u_______________________
71ea8 9f488 __RU_l_____M______u_______________________
71ea9 9f489 __RU_l_____M______u_______________________
71eaa 9f48a __RU_l_____M______u_______________________
71eab 9f48b __RU_l_____M______u_______________________
71eac 9f48c __RU_l_____M______u_______________________
71ead 9f48d __RU_l_____M______u_______________________
71eae 9f48e __RU_l_____M______u_______________________
71eaf 9f48f __RU_l_____M______u_______________________
71eb0 9f490 __RU_l_____M______u_______________________
71eb1 9f491 __RU_l_____M______u_______________________
71eb2 9f492 __RU_l_____M______u_______________________
71eb3 9f493 __RU_l_____M______u_______________________
71eb4 9f494 __RU_l_____M______u_______________________
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71ebc 9f49c __RU_l_____M______u_______________________
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71f25 9f6a8 __RU_l_____M______u_______________________
71f26 9f6a9 __RU_lA____M______________________________
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71f28 9f6ab __RU_lA____M______________________________
71f29 9f6ac __RU_lA____M______________________________
71f2b 9f6ae __RU_lA____M______________________________
71f2c 9f474 __RU_lA____M______________________________
71f2d 9f475 __RU_lA____M______________________________
71f2e 9f476 __RU_lA____M______________________________
71f2f 9f477 __RU_lA____M______________________________
71f34 819bb ___U_lA____Ma_b___________________________
71f35 81a0b ___U_lA____Ma_b___________________________
71f36 7e16f ___UDlA____Ma_b___________________________
71f37 7e403 ___UDlA____Ma_b___________________________
71f38 8444e ___U_lA____Ma_b___________________________
71f39 72081 ___U_lA____Ma_b___________________________
71f3a 7e713 ___UDlA____Ma_b___________________________
71f5e 9f677 __RU_l_____M______u_______________________
71f5f 9f678 __RU_l_____M______u_______________________
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71f62 79818 ___UDlA____Ma_b___________________________
71f63 7045d ___U_lA____Ma_b___________________________
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71f84 852c5 ___U_lA____Ma_b___________________________
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72000 7ddb1 ___U_lA____Ma_b___________________________
72001 859f1 ___U_lA____Ma_b___________________________
72005 70f79 ___U_lA____Ma_b___________________________
72009 799d9 ___UDlA____Ma_b___________________________
7208c 9f548 __RU_l_____M______u_______________________
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720da 9f4fa __RU_l_____M______u_______________________
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720ec 9f5b9 __RU_l_____M______u_______________________
720ed 9f5ba __RU_l_____M______u_______________________
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720ef 9f5bc __RU_l_____M______u_______________________
720f0 9f5bd __RU_l_____M______u_______________________
720f1 9f5be __RU_l_____M______u_______________________
720f2 9f5bf __RU_l_____M______u_______________________
720f3 9f5c0 __RU_l_____M______u_______________________
720f4 9f5c1 __RU_l_____M______u_______________________
720f5 9f5c2 __RU_l_____M______u_______________________
720f6 9f5c3 __RU_l_____M______u_______________________
720f7 9f5c4 __RU_l_____M______u_______________________
720f8 9f5c5 __RU_l_____M______u_______________________
720f9 9f5c6 __RU_l_____M______u_______________________
720fa 9f5c7 __RU_l_____M______u_______________________
720fb 9f5c8 __RU_l_____M______u_______________________
720fc 9f5c9 __RU_l_____M______u_______________________
720fd 9f5ca __RU_l_____M______u_______________________
720fe 9f5cb __RU_l_____M______u_______________________
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72100 9f5cd __RU_l_____M______u_______________________
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72102 9f5cf __RU_l_____M______u_______________________
72103 9f5d0 __RU_l_____M______u_______________________
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72105 9f5d2 __RU_l_____M______u_______________________
72106 9f5d3 __RU_l_____M______u_______________________
72107 9f5d4 __RU_l_____M______u_______________________
72108 9f5d5 __RU_l_____M______u_______________________
72109 9f5d6 __RU_l_____M______u_______________________
7210a 9f5d7 __RU_l_____M______u_______________________
7210b 9f6bc __RU_lA____M______________________________
7210c 9f6bd __RU_l_____M______u_______________________
7210d 9f6be __RU_l_____M______u_______________________
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72127 9f646 __RU_l_____M______u_______________________
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7212a 9f649 __RU_l_____M______u_______________________
7212b 9f64a __RU_l_____M______u_______________________
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7212d 9f64c __RU_l_____M______u_______________________
7212e 9f64d __RU_l_____M______u_______________________
7212f 9f64e __RU_l_____M______u_______________________
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7213d 9f65c __RU_l_____M______u_______________________
7213e 9f65d __RU_l_____M______u_______________________
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7215c 9f62a __RU_l_____M______u_______________________
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7216d 85c4e ___UDlA____Ma_b___________________________
7216e 72289 ___U_lA____Ma_b___________________________
7216f 7e776 ___UDlA____Ma_b___________________________
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72171 7323b ___U_lA____Ma_b___________________________
72172 73258 ___UDlA____Ma_b___________________________
72173 798b6 ___UDlA____Ma_b___________________________
72174 730b5 ___UDlA____Ma_b___________________________
72175 7de2f ___U_lA____Ma_b___________________________
72176 74623 ___UDlA____Ma_b___________________________
72178 794fd ___UDlA____Ma_b___________________________
72179 7ab43 ___U_lA____Ma_b___________________________
721b2 9c571 __RU_lA____M______________________________
721b4 9c573 __RU_lA____M______________________________
721b5 9c574 __RU_lA____M______________________________
721b6 72364 ___U_lA____Ma_b___________________________
721b7 8554a ___U_lA____Ma_b___________________________
721c3 9f50b __RU_l_____M______u_______________________
721c4 78337 ___UDlA____Ma_b___________________________
721ef 9f02b __RUDl_____M__b___u_______________________
721f0 9f29b __RUDl_____M__b___u_______________________
7220f 9f068 __RUDl_____M__b___u_______________________
7222f 71d8a ___UDlA____Ma_b___________________________
72240 86654 ___U_lA____Ma_b___________________________
72243 790f4 ___UDlA____Ma_b___________________________
72244 811c7 ___U_lA____Ma_b___________________________
72245 8872e __RUDl_____M__b___u_______________________
72246 8875d __RUDl_____M__b___u_______________________
72247 8875c __RUDl_____M__b___u_______________________
72248 8877d __RUDl_____M__b___u_______________________
72249 8877c __RUDl_____M__b___u_______________________
7224a 8877e __RUDl_____M__b___u_______________________
7224b 8877b __RUDl_____M__b___u_______________________
7224c 82234 ___U_lA____Ma_b___________________________
7224d 73559 ___UDlA____Ma_b___________________________
7224e 91c51 ___U_lA____Ma_b___________________________
7224f 9f036 __RUDl_____M__b___u_______________________
7226f 8d1d8 ___U_lA____Ma_b___________________________
72270 819f7 ___U_lA____Ma_b___________________________
72271 720dc ___U_lA____Ma_b___________________________
72272 9f023 __RUDl_____M__b___u_______________________
72295 9f068 __RUDl_____M__b___u_______________________
722b5 8bd9d ___U_lA____Ma_b___________________________
722b6 8872e __RUDl_____M__b___u_______________________
722b7 8875d __RUDl_____M__b___u_______________________
722b8 8875c __RUDl_____M__b___u_______________________
722b9 8877d __RUDl_____M__b___u_______________________
722ba 8877c __RUDl_____M__b___u_______________________
722bb 8877e __RUDl_____M__b___u_______________________
722bc 8877b __RUDl_____M__b___u_______________________
722bd 81651 ___U_lA____Ma_b___________________________
722be 7e251 ___UDlA____Ma_b___________________________
722bf 720e8 ___U_lA____Ma_b___________________________
722c0 8183b ___UDlA____Ma_b___________________________
722c1 84b5b ___U_lA____Ma_b___________________________
722c2 8346a ___UDlA____Ma_b___________________________
722c8 87a04 ___U_lA____Ma_b___________________________
722ca 79811 ___UDlA____Ma_b___________________________
722ce 9f006 __RU_l_____M______u_______________________
722cf 9f007 __RU_l_____M______u_______________________
722d0 9f290 __RU_l_____M______u_______________________
722d1 9f291 __RU_l_____M______u_______________________
722d2 9f3ca __RU_l_____M______u_______________________
722d3 9f3cb __RU_l_____M______u_______________________
722d4 9f3cc __RU_l_____M______u_______________________
722d5 9f3cd __RU_l_____M______u_______________________
722d6 9f3ce __RU_l_____M______u_______________________
722d7 9f3cf __RU_l_____M______u_______________________
722d8 9f3ac __RU_l_____M______u_______________________
722d9 9f3ad __RU_l_____M______u_______________________
722da 9f3ae __RU_l_____M______u_______________________
722db 9f3af __RU_l_____M______u_______________________
722dc 9f3b0 __RU_l_____M______u_______________________
722dd 9f3b1 __RU_l_____M______u_______________________
722de 9f3b2 __RU_l_____M______u_______________________
722df 9f3b3 __RU_l_____M______u_______________________
722e0 9f3b4 __RU_l_____M______u_______________________
722e1 9f3b5 __RU_l_____M______u_______________________
722e2 9f3b6 __RU_l_____M______u_______________________
722e3 9f3b7 __RU_l_____M______u_______________________
722e4 9f3b8 __RU_l_____M______u_______________________
722e5 9f3b9 __RU_l_____M______u_______________________
722e6 9f3ba __RU_l_____M______u_______________________
722e7 9f3bb __RU_l_____M______u_______________________
722e8 9f3bc __RU_l_____M______u_______________________
722e9 9f3bd __RU_l_____M______u_______________________
722ea 9f3be __RU_l_____M______u_______________________
722eb 9f3bf __RU_l_____M______u_______________________
722ec 9f340 __RU_l_____M______u_______________________
722ed 9f341 __RU_l_____M______u_______________________
722ee 9f342 __RU_l_____M______u_______________________
722ef 9f343 __RU_l_____M______u_______________________
7231a 9f3d8 __RU_l_____M______u_______________________
7231b 9f3d9 __RU_l_____M______u_______________________
7231c 9f3da __RU_l_____M______u_______________________
7231d 9f3db __RU_l_____M______u_______________________
7231e 9f3dc __RU_l_____M______u_______________________
7231f 9f3dd __RU_l_____M______u_______________________
72320 9f3de __RU_l_____M______u_______________________
72321 9f3df __RU_l_____M______u_______________________
72322 9f3e0 __RU_l_____M______u_______________________
72323 9f3e1 __RU_l_____M______u_______________________
72324 9f3e2 __RU_l_____M______u_______________________
72325 9f3e3 __RU_l_____M______u_______________________
72326 9f3e4 __RU_l_____M______u_______________________
72327 9f3e5 __RU_l_____M______u_______________________
72328 9f3e6 __RU_l_____M______u_______________________
72329 9f3e7 __RU_l_____M______u_______________________
7232a 9f3e8 __RU_l_____M______u_______________________
7232b 9f3e9 __RU_l_____M______u_______________________
7232c 9f3ea __RU_l_____M______u_______________________
7232d 9f3eb __RU_l_____M______u_______________________
7232e 9f3ec __RU_l_____M______u_______________________
7232f 9f3ed __RU_l_____M______u_______________________
72340 9f407 __RU_l_____M______u_______________________
72341 9f408 __RU_l_____M______u_______________________
72342 9f34d __RU_l_____M______u_______________________
72343 9f34e __RU_l_____M______u_______________________
72344 9f34f __RU_l_____M______u_______________________
72345 9f350 __RU_l_____M______u_______________________
72346 9f351 __RU_l_____M______u_______________________
72347 9f352 __RU_l_____M______u_______________________
72348 9f353 __RU_l_____M______u_______________________
72349 9f354 __RU_l_____M______u_______________________
7234a 9f355 __RU_l_____M______u_______________________
7234b 9f356 __RU_l_____M______u_______________________
7234c 9f357 __RU_l_____M______u_______________________
7234d 9f358 __RU_l_____M______u_______________________
7234e 9f359 __RU_l_____M______u_______________________
7234f 9f35a __RU_l_____M______u_______________________
72350 9f35b __RU_l_____M______u_______________________
72351 9f35c __RU_l_____M______u_______________________
72352 9f35d __RU_l_____M______u_______________________
72353 9f35e __RU_l_____M______u_______________________
72354 9f35f __RU_l_____M______u_______________________
72355 9f360 __RU_l_____M______u_______________________
72356 9f361 __RU_l_____M______u_______________________
72357 9f362 __RU_l_____M______u_______________________
72358 9f363 __RU_l_____M______u_______________________
72359 9f364 __RU_l_____M______u_______________________
7235a 9f365 __RU_l_____M______u_______________________
7235b 9f366 __RU_l_____M______u_______________________
7235c 9f367 __RU_l_____M______u_______________________
7235d 9f368 __RU_l_____M______u_______________________
7235e 9f369 __RU_l_____M______u_______________________
7235f 9f36a __RU_l_____M______u_______________________
72360 9f36b __RU_l_____M______u_______________________
72361 9f36c __RU_l_____M______u_______________________
72362 9f36d __RU_l_____M______u_______________________
72363 9f36e __RU_l_____M______u_______________________
72364 9f36f __RU_l_____M______u_______________________
72365 9f370 __RU_l_____M______u_______________________
72366 9f371 __RU_l_____M______u_______________________
72367 9f372 __RU_l_____M______u_______________________
72368 9f373 __RU_l_____M______u_______________________
72369 9f374 __RU_l_____M______u_______________________
7236a 9f375 __RU_l_____M______u_______________________
7236b 9f376 __RU_l_____M______u_______________________
7236c 9f377 __RU_l_____M______u_______________________
7236d 9f378 __RU_l_____M______u_______________________
7236e 9f379 __RU_l_____M______u_______________________
7236f 9f37a __RU_l_____M______u_______________________
72370 9f37b __RU_l_____M______u_______________________
72371 9f37c __RU_l_____M______u_______________________
72372 9f37d __RU_l_____M______u_______________________
72373 9f37e __RU_l_____M______u_______________________
72374 9f37f __RU_l_____M______u_______________________
72375 9f3c0 __RU_l_____M______u_______________________
72376 9f3c1 __RU_l_____M______u_______________________
72377 9f3c2 __RU_l_____M______u_______________________
72378 9f3c3 __RU_l_____M______u_______________________
72379 9f3c4 __RU_l_____M______u_______________________
7237a 9f3c5 __RU_l_____M______u_______________________
7237b 9f3c6 __RU_l_____M______u_______________________
7237c 9f3c7 __RU_l_____M______u_______________________
7237d 9f3c8 __RU_l_____M______u_______________________
7237e 9f3c9 __RU_l_____M______u_______________________
7237f 9f3fa __RU_l_____M______u_______________________
72380 9f3fb __RU_l_____M______u_______________________
72381 9f3fc __RU_l_____M______u_______________________
72382 9f29c __RU_l_____M______u_______________________
72383 9f29d __RU_l_____M______u_______________________
72384 9f29e __RU_l_____M______u_______________________
72385 9f29f __RU_l_____M______u_______________________
72386 9f2a0 __RU_l_____M______u_______________________
72387 9f2a1 __RU_l_____M______u_______________________
72388 9f2a2 __RU_l_____M______u_______________________
72389 9f2a3 __RU_l_____M______u_______________________
7238a 9f2a4 __RU_l_____M______u_______________________
7238b 9f2a5 __RU_l_____M______u_______________________
7238c 9f2a6 __RU_l_____M______u_______________________
7238d 7e48e ___UDlA____Ma_b___________________________
7238e 8144e ___U_lA____Ma_b___________________________
7238f 81958 ___U_lA____Ma_b___________________________
72390 926c6 ___U_lA____Ma_b___________________________
72391 79614 ___UDlA____Ma_b___________________________
72392 78355 ___U_lA____Ma_b___________________________
72393 79992 ___UDlA____Ma_b___________________________
72394 79dd1 ___UDlA____Ma_b___________________________
72395 70d42 ___U_lA____Ma_b___________________________
72396 7049e ___U_lA____Ma_b___________________________
72397 7983a ___UDlA____Ma_b___________________________
72398 7964e ___UDlA____Ma_b___________________________
7239c 74670 ___UDlA____Ma_b___________________________
7e954 7468c ___UDlA____Ma_b___________________________
7e955 84f40 ___U_lA____Ma_b___________________________
7e956 7dcf3 ___U_lA____Ma_b___________________________
7e957 735d5 ___U_lA____Ma_b___________________________
7e958 732ea ___U_lA____Ma_b___________________________
7e959 737cb __RU_lA____Ma_b___________________________
7ec00 20ed8 ___________M______________________________


flags page-count MB symbolic-flags long-symbolic-flags
0x0000000000000800 1 0 ___________M______________________________ mmap
0x0000000000000828 1 0 ___U_l_____M______________________________ uptodate,lru,mmap
0x000000000004082c 444 1 __RU_l_____M______u_______________________ referenced,uptodate,lru,mmap,unevictable
0x000000000004483c 20 0 __RUDl_____M__b___u_______________________ referenced,uptodate,dirty,lru,mmap,swapbacked,unevictable
0x0000000000000868 1 0 ___U_lA____M______________________________ uptodate,lru,active,mmap
0x000000000000086c 14 0 __RU_lA____M______________________________ referenced,uptodate,lru,active,mmap
0x0000000000005868 47 0 ___U_lA____Ma_b___________________________ uptodate,lru,active,mmap,anonymous,swapbacked
0x000000000000586c 1 0 __RU_lA____Ma_b___________________________ referenced,uptodate,lru,active,mmap,anonymous,swapbacked
0x0000000000005878 31 0 ___UDlA____Ma_b___________________________ uptodate,dirty,lru,active,mmap,anonymous,swapbacked

What is voffset and Offset ?
Because cma-reserved range start from 0x60000 and i didnt found single page in that range after allocation cma memory ?

I found locked pages with stack trace using page_owner.c

Page allocated via order 0, mask 0x14213ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD|__GFP_NOWARN|__GFP_NORETRY)
PFN 555075 type Movable Block 135 type CMA Flags 0x8019042c(referenced|uptodate|lru|arch_1|mappedtodisk|unevictable|mlocked)
get_page_from_freelist+0xa98/0xbf8
__alloc_pages_nodemask+0xe8/0x124c
__do_page_cache_readahead+0x120/0x2c4
ondemand_readahead+0x180/0x2b4
page_cache_sync_readahead+0x4c/0x6c
generic_file_read_iter+0x7e8/0xae4
ext4_file_read_iter+0x3c/0x54
new_sync_read+0xd4/0x118
vfs_read+0x15c/0x1ac
SyS_pread64+0xa0/0xbc
ret_fast_syscall+0x0/0x4c
Page has been migrated, last migrate reason: cma


but how to know the process name ? who acquire this page ?

Did you look at "current" which is pointer to current process.

print is using debugfs & it prints all pages with above details, so current pointer will not give you what we need.


Thanks.
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