Re: [PATCH] Export mlock information via smaps

From: Wu Fengguang
Date: Wed Aug 18 2010 - 11:10:14 EST

Nikanth,

On Tue, Aug 17, 2010 at 11:25:36AM -0500, Matt Mackall wrote:
> On Tue, 2010-08-17 at 10:39 +0530, Nikanth Karthikesan wrote:
> > Currently there is no way to find whether a process has locked its pages in
> > memory or not. And which of the memory regions are locked in memory.

FYI, Documentation/vm/page-types.c can report mlocked pages.
Try this:

# usemem 1m --mlock --sleep 10000&

# page-types -r -p `pidof usemem` -l
voffset offset len flags
400 32826 1 __RU_lA____M____________d_________
401 2eba2 1 ___U_lA____M____________d_________
402 36ad8 1 ___U_lA____M____________d_________
603 37025 1 ___U_lA____Ma_b___________________
7f2b9d38d 1390b5 1 __RU_lA____M____________d_________
7f2b9d38e 1390ba 3 __RU_lA____M____________d_________
7f2b9d391 139116 1 __RU_lA____M____________d_________
7f2b9d392 1390d0 5 __RU_lA____M____________d_________
7f2b9d397 1390d9 16 __RU_lA____M____________d_________
7f2b9d3be 139109 1 __RU_lA____M____________d_________
7f2b9d3bf 139108 1 __RU_lA____M____________d_________
7f2b9d3c2 139105 1 __RU_lA____M____________d_________
7f2b9d3c3 139104 1 __RU_lA____M____________d_________
7f2b9d3c4 139103 1 __RU_lA____M____________d_________
7f2b9d408 1391b3 3 __RU_lA____M____________d_________
7f2b9d412 1391bd 2 __RU_lA____M____________d_________
7f2b9d42d 1391d3 1 __RU_lA____M____________d_________
7f2b9d42f 1391d5 1 __RU_lA____M____________d_________
7f2b9d435 1391db 2 __RU_lA____M____________d_________
7f2b9d454 13918e 2 __RU_lA____M____________d_________
7f2b9d458 139192 1 __RU_lA____M____________d_________
7f2b9d45b 139195 1 __RU_lA____M____________d_________
7f2b9d468 1391a2 2 __RU_lA____M____________d_________
7f2b9d492 139176 1 __RU_lA____M____________d_________
7f2b9d49e 139182 2 __RU_lA____M____________d_________
7f2b9d4aa 13914e 1 __RU_lA____M____________d_________
7f2b9d4ad 139151 2 __RU_lA____M____________d_________
7f2b9d4b1 139156 1 __RU_lA____M____________d_________
7f2b9d4b3 139158 2 __RU_lA____M____________d_________
7f2b9d6e4 2dfb5 1 ___U_lA____Ma_b___________________
7f2b9d6e5 81643 1 ___U_lA____Ma_b___________________
7f2b9d6e6 33d35 1 ___U_lA____Ma_b___________________
7f2b9d6e7 39ee8 1 ___U_lA____Ma_b___________________
7f2b9d6e8 41238 1 ___U_lA____Ma_b___________________
7f2b9d6e9 2fe04 1 ___U_lA____Ma_b___________________
7f2b9d6ea 3010d 1 ___U_lA____Ma_b___________________
7f2b9d6eb 2f916 1 ___U_lA____Ma_b___________________
7f2b9d6ed 2ed81 1 ___U_lA____Ma_b___________________
7f2b9d6ee 138c62 1 __RU_lA____M____________d_________
7f2b9d6ef 138dac 1 __RU_lA____M____________d_________
7f2b9d6f0 138ddf 1 __RU_lA____M____________d_________
7f2b9d6f1 138c68 1 __RU_lA____M____________d_________
7f2b9d6f2 138e08 1 __RU_lA____M____________d_________
7f2b9d6f3 138e23 1 __RU_lA____M____________d_________
7f2b9d6fc 138e1b 1 __RU_lA____M____________d_________
7f2b9d6fd 138e1a 1 __RU_lA____M____________d_________
7f2b9d6fe 138e19 1 __RU_lA____M____________d_________
7f2b9d904 2f322 1 ___U_lA____Ma_b___________________
7f2b9d905 2ede6 1 ___U_lA____Ma_b___________________
7f2b9d909 2ca5a 1 ___U_lA____Ma_b___________________
7f2b9d90a 139023 4 __RU_lA____M____________d_________
7f2b9d90e 139048 a __RU_lA____M____________d_________
7f2b9d918 13902d 3 __RU_lA____M____________d_________
7f2b9d91d 139032 3 __RU_lA____M____________d_________
7f2b9d920 13903e 3 __RU_lA____M____________d_________
7f2b9d925 139043 1 __RU_lA____M____________d_________
7f2b9da01 38582 1 __RU_l_____Ma_b___u____m__________
7f2b9da02 32d75 1 __RU_l_____Ma_b___u____m__________
7f2b9da03 2726e 1 __RU_l_____Ma_b___u____m__________
7f2b9da04 33279 1 __RU_l_____Ma_b___u____m__________
7f2b9da05 2d826 1 __RU_l_____Ma_b___u____m__________
7f2b9da06 318e9 1 __RU_l_____Ma_b___u____m__________
7f2b9da07 36e83 1 __RU_l_____Ma_b___u____m__________
7f2b9da08 467f1 1 __RU_l_____Ma_b___u____m__________
7f2b9da09 31417 1 __RU_l_____Ma_b___u____m__________
7f2b9da0a 38c68 1 __RU_l_____Ma_b___u____m__________
7f2b9da0b 32cf4 1 __RU_l_____Ma_b___u____m__________
7f2b9da0c 2e51e 1 __RU_l_____Ma_b___u____m__________
7f2b9da0d 2726f 1 __RU_l_____Ma_b___u____m__________
7f2b9da0e 37ee5 1 __RU_l_____Ma_b___u____m__________
7f2b9da0f 30461 1 __RU_l_____Ma_b___u____m__________
7f2b9da10 2c7a5 1 __RU_l_____Ma_b___u____m__________
7f2b9da11 3d2c7 1 __RU_l_____Ma_b___u____m__________
7f2b9da12 33ede 1 __RU_l_____Ma_b___u____m__________
7f2b9da13 5cd3e 1 __RU_l_____Ma_b___u____m__________
7f2b9da14 373f4 1 __RU_l_____Ma_b___u____m__________
7f2b9da15 3163a 1 __RU_l_____Ma_b___u____m__________
7f2b9da16 2eba3 1 __RU_l_____Ma_b___u____m__________
7f2b9da17 5e1c4 1 __RU_l_____Ma_b___u____m__________
7f2b9da18 3e761 1 __RU_l_____Ma_b___u____m__________
7f2b9da19 4b6c5 1 __RU_l_____Ma_b___u____m__________
7f2b9da1a 2efd1 1 __RU_l_____Ma_b___u____m__________
7f2b9da1b 32b62 1 __RU_l_____Ma_b___u____m__________
7f2b9da1c 3851a 1 __RU_l_____Ma_b___u____m__________
7f2b9da1d 2f33e 1 __RU_l_____Ma_b___u____m__________
7f2b9da1e 3e2e4 1 __RU_l_____Ma_b___u____m__________
7f2b9da1f 31e5c 1 __RU_l_____Ma_b___u____m__________
7f2b9da20 2f33d 1 __RU_l_____Ma_b___u____m__________
7f2b9da21 5ddc4 1 __RU_l_____Ma_b___u____m__________
7f2b9da22 302e0 1 __RU_l_____Ma_b___u____m__________
7f2b9da23 2ea24 1 __RU_l_____Ma_b___u____m__________
7f2b9da24 50972 1 __RU_l_____Ma_b___u____m__________
7f2b9da25 38935 1 __RU_l_____Ma_b___u____m__________
7f2b9da26 35c30 1 __RU_l_____Ma_b___u____m__________
7f2b9da27 2e51d 1 __RU_l_____Ma_b___u____m__________
7f2b9da28 2dca2 1 __RU_l_____Ma_b___u____m__________
7f2b9da29 4235d 1 __RU_l_____Ma_b___u____m__________
7f2b9da2a 368a4 1 __RU_l_____Ma_b___u____m__________
7f2b9da2b 2d3be 1 __RU_l_____Ma_b___u____m__________
7f2b9da2c 3ab26 1 __RU_l_____Ma_b___u____m__________
7f2b9da2d 2c60d 1 __RU_l_____Ma_b___u____m__________
7f2b9da2e 396b0 1 __RU_l_____Ma_b___u____m__________
7f2b9da2f 38326 1 __RU_l_____Ma_b___u____m__________
7f2b9da30 36fc1 1 __RU_l_____Ma_b___u____m__________
7f2b9da31 34a40 1 __RU_l_____Ma_b___u____m__________
7f2b9da32 363f6 1 __RU_l_____Ma_b___u____m__________
7f2b9da33 324c5 1 __RU_l_____Ma_b___u____m__________
7f2b9da34 31ebe 1 __RU_l_____Ma_b___u____m__________
7f2b9da35 3fb0b 1 __RU_l_____Ma_b___u____m__________
7f2b9da36 3bac6 1 __RU_l_____Ma_b___u____m__________
7f2b9da37 360b3 1 __RU_l_____Ma_b___u____m__________
7f2b9da38 2c727 1 __RU_l_____Ma_b___u____m__________
7f2b9da39 33edc 1 __RU_l_____Ma_b___u____m__________
7f2b9da3a 57592 1 __RU_l_____Ma_b___u____m__________
7f2b9da3b 2e9b2 1 __RU_l_____Ma_b___u____m__________
7f2b9da3c 30587 1 __RU_l_____Ma_b___u____m__________
7f2b9da3d 3b4bd 1 __RU_l_____Ma_b___u____m__________
7f2b9da3e 33e09 1 __RU_l_____Ma_b___u____m__________
7f2b9da3f 2c724 2 __RU_l_____Ma_b___u____m__________
7f2b9da41 31e5e 1 __RU_l_____Ma_b___u____m__________
7f2b9da42 3ad93 1 __RU_l_____Ma_b___u____m__________
7f2b9da43 33449 1 __RU_l_____Ma_b___u____m__________
7f2b9da44 3180d 1 __RU_l_____Ma_b___u____m__________
7f2b9da45 5c309 1 __RU_l_____Ma_b___u____m__________
7f2b9da46 4582e 1 __RU_l_____Ma_b___u____m__________
7f2b9da47 3114d 1 __RU_l_____Ma_b___u____m__________
7f2b9da48 2c61b 1 __RU_l_____Ma_b___u____m__________
7f2b9da49 45a30 1 __RU_l_____Ma_b___u____m__________
7f2b9da4a 60bfc 1 __RU_l_____Ma_b___u____m__________
7f2b9da4b 2726c 1 __RU_l_____Ma_b___u____m__________
7f2b9da4c 39808 1 __RU_l_____Ma_b___u____m__________
7f2b9da4d 354d5 1 __RU_l_____Ma_b___u____m__________
7f2b9da4e 2e4c4 1 __RU_l_____Ma_b___u____m__________
7f2b9da4f 36f94 1 __RU_l_____Ma_b___u____m__________
7f2b9da50 2f6e1 1 __RU_l_____Ma_b___u____m__________
7f2b9da51 39028 1 __RU_l_____Ma_b___u____m__________
7f2b9da52 48553 1 __RU_l_____Ma_b___u____m__________
7f2b9da53 30ff2 1 __RU_l_____Ma_b___u____m__________
7f2b9da54 2cb66 1 __RU_l_____Ma_b___u____m__________
7f2b9da55 2fe05 1 __RU_l_____Ma_b___u____m__________
7f2b9da56 346d3 1 __RU_l_____Ma_b___u____m__________
7f2b9da57 2e4c6 1 __RU_l_____Ma_b___u____m__________
7f2b9da58 3cf94 1 __RU_l_____Ma_b___u____m__________
7f2b9da59 3b4bc 1 __RU_l_____Ma_b___u____m__________
7f2b9da5a 3b0b2 1 __RU_l_____Ma_b___u____m__________
7f2b9da5b 36f9e 1 __RU_l_____Ma_b___u____m__________
7f2b9da5c 3afc3 1 __RU_l_____Ma_b___u____m__________
7f2b9da5d 363f7 1 __RU_l_____Ma_b___u____m__________
7f2b9da5e 2efb6 1 __RU_l_____Ma_b___u____m__________
7f2b9da5f 2fc04 1 __RU_l_____Ma_b___u____m__________
7f2b9da60 3e162 1 __RU_l_____Ma_b___u____m__________
7f2b9da61 34495 1 __RU_l_____Ma_b___u____m__________
7f2b9da62 2ce82 1 __RU_l_____Ma_b___u____m__________
7f2b9da63 5cae0 1 __RU_l_____Ma_b___u____m__________
7f2b9da64 30838 1 __RU_l_____Ma_b___u____m__________
7f2b9da65 3980a 1 __RU_l_____Ma_b___u____m__________
7f2b9da66 368a5 1 __RU_l_____Ma_b___u____m__________
7f2b9da67 53af9 1 __RU_l_____Ma_b___u____m__________
7f2b9da68 3464a 1 __RU_l_____Ma_b___u____m__________
7f2b9da69 32a3a 1 __RU_l_____Ma_b___u____m__________
7f2b9da6a 5423c 1 __RU_l_____Ma_b___u____m__________
7f2b9da6b 32dd6 1 __RU_l_____Ma_b___u____m__________
7f2b9da6c 33e08 1 __RU_l_____Ma_b___u____m__________
7f2b9da6d 35d41 1 __RU_l_____Ma_b___u____m__________
7f2b9da6e 32d74 1 __RU_l_____Ma_b___u____m__________
7f2b9da6f 2d827 1 __RU_l_____Ma_b___u____m__________
7f2b9da70 37c1d 1 __RU_l_____Ma_b___u____m__________
7f2b9da71 2cf46 1 __RU_l_____Ma_b___u____m__________
7f2b9da72 59284 1 __RU_l_____Ma_b___u____m__________
7f2b9da73 31c7f 1 __RU_l_____Ma_b___u____m__________
7f2b9da74 3eda9 1 __RU_l_____Ma_b___u____m__________
7f2b9da75 2f33c 1 __RU_l_____Ma_b___u____m__________
7f2b9da76 54236 1 __RU_l_____Ma_b___u____m__________
7f2b9da77 2c7a4 1 __RU_l_____Ma_b___u____m__________
7f2b9da78 3cd04 1 __RU_l_____Ma_b___u____m__________
7f2b9da79 329cb 1 __RU_l_____Ma_b___u____m__________
7f2b9da7a 38434 1 __RU_l_____Ma_b___u____m__________
7f2b9da7b 301eb 1 __RU_l_____Ma_b___u____m__________
7f2b9da7c 2e472 1 __RU_l_____Ma_b___u____m__________
7f2b9da7d 440fb 1 __RU_l_____Ma_b___u____m__________
7f2b9da7e 2f770 1 __RU_l_____Ma_b___u____m__________
7f2b9da7f 36e28 1 __RU_l_____Ma_b___u____m__________
7f2b9da80 3036b 1 __RU_l_____Ma_b___u____m__________
7f2b9da81 36716 1 __RU_l_____Ma_b___u____m__________
7f2b9da82 38805 1 __RU_l_____Ma_b___u____m__________
7f2b9da83 32b63 1 __RU_l_____Ma_b___u____m__________
7f2b9da84 af25c 1 __RU_l_____Ma_b___u____m__________
7f2b9da85 38581 1 __RU_l_____Ma_b___u____m__________
7f2b9da86 2ec22 1 __RU_l_____Ma_b___u____m__________
7f2b9da87 33e0a 2 __RU_l_____Ma_b___u____m__________
7f2b9da89 2eba0 2 __RU_l_____Ma_b___u____m__________
7f2b9da8b 3b4be 2 __RU_l_____Ma_b___u____m__________
7f2b9da8d 31ebc 2 __RU_l_____Ma_b___u____m__________
7f2b9da8f 2e9de 2 __RU_l_____Ma_b___u____m__________
7f2b9da91 368a6 2 __RU_l_____Ma_b___u____m__________
7f2b9da93 2c7a6 2 __RU_l_____Ma_b___u____m__________
7f2b9da95 302a4 2 __RU_l_____Ma_b___u____m__________
7f2b9da97 415fa 2 __RU_l_____Ma_b___u____m__________
7f2b9da99 34648 2 __RU_l_____Ma_b___u____m__________
7f2b9da9b 2fe06 2 __RU_l_____Ma_b___u____m__________
7f2b9da9d 32cf6 2 __RU_l_____Ma_b___u____m__________
7f2b9da9f 35b9a 2 __RU_l_____Ma_b___u____m__________
7f2b9daa1 2fad8 4 __RU_l_____Ma_b___u____m__________
7f2b9daa5 30bc0 4 __RU_l_____Ma_b___u____m__________
7f2b9daa9 2f064 4 __RU_l_____Ma_b___u____m__________
7f2b9daad 30cac 4 __RU_l_____Ma_b___u____m__________
7f2b9dab1 2f330 4 __RU_l_____Ma_b___u____m__________
7f2b9dab5 36580 4 __RU_l_____Ma_b___u____m__________
7f2b9dab9 2f0c0 4 __RU_l_____Ma_b___u____m__________
7f2b9dabd 32958 4 __RU_l_____Ma_b___u____m__________
7f2b9dac1 2f1c0 4 __RU_l_____Ma_b___u____m__________
7f2b9dac5 2d6b4 4 __RU_l_____Ma_b___u____m__________
7f2b9dac9 311c8 4 __RU_l_____Ma_b___u____m__________
7f2b9dacd 3342c 4 __RU_l_____Ma_b___u____m__________
7f2b9dad1 33f98 4 __RU_l_____Ma_b___u____m__________
7f2b9dad5 346ac 4 __RU_l_____Ma_b___u____m__________
7f2b9dad9 328bc 4 __RU_l_____Ma_b___u____m__________
7f2b9dadd 39190 4 __RU_l_____Ma_b___u____m__________
7f2b9dae1 2cd90 4 __RU_l_____Ma_b___u____m__________
7f2b9dae5 35b84 4 __RU_l_____Ma_b___u____m__________
7f2b9dae9 304ac 4 __RU_l_____Ma_b___u____m__________
7f2b9daed 3b0fc 4 __RU_l_____Ma_b___u____m__________
7f2b9daf1 31214 4 __RU_l_____Ma_b___u____m__________
7f2b9daf5 34b28 4 __RU_l_____Ma_b___u____m__________
7f2b9daf9 34e28 4 __RU_l_____Ma_b___u____m__________
7f2b9dafd 2e3b4 4 __RU_l_____Ma_b___u____m__________
7f2b9db01 35b98 1 ___U_lA____Ma_b___________________
7f2b9db02 36f9f 1 ___U_lA____Ma_b___________________
7f2b9db03 36cb5 1 ___U_lA____Ma_b___________________
7f2b9db25 39809 1 ___U_lA____Ma_b___________________
7f2b9db26 34497 1 ___U_lA____Ma_b___________________
7f2b9db27 31ebf 1 ___U_lA____Ma_b___________________
7f2b9db28 2ca5b 1 ___U_lA____Ma_b___________________
7f2b9db29 334ab 1 ___U_lA____Ma_b___________________
7fff4dcd0 2e53e 1 ___U_lA____Ma_b___________________
7fff4dcd1 3b1d0 1 __RU_lA____Ma_b___________________
7fff4ddd6 139f2a 1 __R________M______________________


flags page-count MB symbolic-flags long-symbolic-flags
0x0000000000000804 1 0 __R________M______________________ referenced,mmap
0x0000000400000868 2 0 ___U_lA____M____________d_________ uptodate,lru,active,mmap,mappedtodisk
0x000000040000086c 95 0 __RU_lA____M____________d_________ referenced,uptodate,lru,active,mmap,mappedtodisk
0x000000020004582c 256 1 __RU_l_____Ma_b___u____m__________ referenced,uptodate,lru,mmap,anonymous,swapbacked,unevictable,mlocked
0x0000000000005868 22 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
total 377 1

Thanks,
Fengguang
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