----- Original Message ----- > On Mon, 23 May 2011, David Rientjes wrote: > > > I already suggested an alternative patch to CAI Qian to greatly > > increase > > the granularity of the oom score from a range of 0-1000 to 0-10000 > > to > > differentiate between tasks within 0.01% of available memory (16MB > > on CAI > > Qian's 16GB system). I'll propose this officially in a separate > > email. > > > > This is an alternative patch as earlier proposed with suggested > improvements from Minchan. CAI, would it be possible to test this out > on > your usecase? Here is the results for the testing. Running the reproducer as non-root user, the results look good as OOM killer just killed each python process in-turn that the reproducer forked. However, when running it as root user, sshd and other random processes had been killed. [ pid ] uid tgid total_vm rss cpu oom_adj oom_score_adj name [ 567] 0 567 2935 365 0 -17 -1000 udevd [ 2116] 0 2116 3099 464 8 -17 -1000 udevd [ 2117] 0 2117 3099 503 2 -17 -1000 udevd [ 2317] 0 2317 6404 39 8 -17 -1000 auditd [ 3221] 0 3221 15998 153 9 0 0 sshd [ 3223] 0 3223 24421 204 0 0 0 sshd [ 3227] 0 3227 27093 86 4 0 0 bash [ 3246] 0 3246 1029 18 1 0 0 agetty [ 3251] 0 3251 243710 98227 11 0 0 python [ 3252] 0 3252 243710 109999 9 0 0 python [ 3253] 0 3253 243710 111538 12 0 0 python [ 3254] 0 3254 243710 106931 1 0 0 python [ 3255] 0 3255 243710 103367 9 0 0 python [ 3256] 0 3256 243710 97715 1 0 0 python [ 3257] 0 3257 243710 107443 9 0 0 python [ 3258] 0 3258 243710 101298 4 0 0 python [ 3259] 0 3259 243710 118707 1 0 0 python [ 3260] 0 3260 243710 104882 9 0 0 python [ 3261] 0 3261 243710 108979 12 0 0 python [ 3262] 0 3262 243710 93106 1 0 0 python [ 3263] 0 3263 243710 97714 12 0 0 python [ 3264] 0 3264 243710 91571 12 0 0 python [ 3265] 0 3265 243710 93107 1 0 0 python [ 3266] 0 3266 243710 83790 9 0 0 python [ 3267] 0 3267 243710 81330 5 0 0 python [ 3268] 0 3268 243710 83378 5 0 0 python [ 3269] 0 3269 243710 77235 4 0 0 python [ 3270] 0 3270 243710 80732 1 0 0 python [ 3271] 0 3271 243710 72626 11 0 0 python [ 3272] 0 3272 243710 81385 7 0 0 python [ 3273] 0 3273 243710 71749 3 0 0 python [ 3274] 0 3274 243710 70735 1 0 0 python [ 3275] 0 3275 243710 84403 9 0 0 python [ 3276] 0 3276 243710 72255 13 0 0 python [ 3277] 0 3277 243710 65971 3 0 0 python [ 3278] 0 3278 243710 66172 15 0 0 python [ 3279] 0 3279 243710 69555 1 0 0 python [ 3280] 0 3280 243710 68689 9 0 0 python [ 3281] 0 3281 243710 69553 9 0 0 python [ 3282] 0 3282 243710 64439 6 0 0 python [ 3283] 0 3283 243710 56753 11 0 0 python [ 3284] 0 3284 243710 57917 6 0 0 python [ 3285] 0 3285 243710 55730 9 0 0 python [ 3286] 0 3286 243710 54193 9 0 0 python [ 3287] 0 3287 243710 51123 1 0 0 python [ 3288] 0 3288 243710 52146 15 0 0 python [ 3289] 0 3289 243710 48220 9 0 0 python [ 3290] 0 3290 243710 48051 3 0 0 python [ 3291] 0 3291 243710 40371 3 0 0 python [ 3292] 0 3292 243710 49229 13 0 0 python [ 3293] 0 3293 243710 40549 9 0 0 python [ 3294] 0 3294 243710 41618 5 0 0 python [ 3295] 0 3295 243710 40429 9 0 0 python [ 3296] 0 3296 243710 36787 1 0 0 python [ 3297] 0 3297 243710 39346 11 0 0 python [ 3298] 0 3298 243710 35251 3 0 0 python [ 3299] 0 3299 243710 32872 3 0 0 python [ 3300] 0 3300 243710 29781 1 0 0 python [ 3301] 0 3301 243710 27570 11 0 0 python [ 3302] 0 3302 243710 28081 9 0 0 python [ 3303] 0 3303 243710 24499 1 0 0 python [ 3304] 0 3304 243710 21427 1 0 0 python [ 3305] 0 3305 243710 25522 9 0 0 python [ 3306] 0 3306 243710 28081 9 0 0 python [ 3307] 0 3307 243710 21939 9 0 0 python [ 3308] 0 3308 243710 19890 9 0 0 python [ 3309] 0 3309 243710 18354 3 0 0 python [ 3310] 0 3310 243710 16590 14 0 0 python [ 3311] 0 3311 243710 18718 11 0 0 python [ 3312] 0 3312 243710 17841 1 0 0 python [ 3313] 0 3313 243710 14258 11 0 0 python [ 3314] 0 3314 243710 14426 4 0 0 python [ 3315] 0 3315 243710 15282 6 0 0 python [ 3316] 0 3316 243710 9650 6 0 0 python [ 3317] 0 3317 243710 11699 1 0 0 python [ 3318] 0 3318 243710 11372 3 0 0 python [ 3319] 0 3319 243710 9650 9 0 0 python [ 3320] 0 3320 243710 8426 11 0 0 python [ 3321] 0 3321 243710 4531 3 0 0 python [ 3322] 0 3322 243710 8627 9 0 0 python [ 3323] 0 3323 243710 6578 1 0 0 python [ 3324] 0 3324 243710 5553 7 0 0 python [ 3325] 0 3325 243710 10673 3 0 0 python [ 3326] 0 3326 243710 6578 11 0 0 python [ 3327] 0 3327 243710 3505 1 0 0 python [ 3328] 0 3328 243710 3530 1 0 0 python [ 3329] 0 3329 243710 5205 11 0 0 python [ 3330] 0 3330 243710 1970 9 0 0 python [ 3331] 0 3331 243710 4021 11 0 0 python [ 3332] 0 3332 243710 5043 1 0 0 python [ 3333] 0 3333 243710 2481 1 0 0 python [ 3334] 0 3334 243710 4530 1 0 0 python [ 3343] 0 3343 41835 773 9 0 0 python [ 3344] 0 3344 41835 773 4 0 0 python [ 3345] 0 3345 41835 773 1 0 0 python [ 3346] 0 3346 41835 773 1 0 0 python [ 3347] 0 3347 41835 773 9 0 0 python [ 3348] 0 3348 41835 773 3 0 0 python [ 3349] 0 3349 41835 773 1 0 0 python [ 3350] 0 3350 41835 773 11 0 0 python Out of memory: Kill process 3221 (sshd) score 1 or sacrifice child Killed process 3223 (sshd) total-vm:97684kB, anon-rss:816kB, file-rss:0kB sshd invoked oom-killer: gfp_mask=0x201da, order=0, oom_adj=0, oom_score_adj=0 sshd cpuset=/ mems_allowed=0-1 [ pid ] uid tgid total_vm rss cpu oom_adj oom_score_adj name [ 567] 0 567 2935 0 0 -17 -1000 udevd [ 2103] 0 2103 1025 0 9 0 0 mingetty [ 2105] 0 2105 1025 0 2 0 0 mingetty [ 2109] 0 2109 19263 100 0 0 0 login [ 2116] 0 2116 3099 0 8 -17 -1000 udevd [ 2117] 0 2117 3099 0 2 -17 -1000 udevd [ 2317] 0 2317 6404 20 0 -17 -1000 auditd [ 2338] 0 2338 27093 11 10 0 0 bash [ 2358] 0 2358 245248 8337 6 0 0 python [ 2359] 0 2359 245248 11151 6 0 0 python [ 2360] 0 2360 245248 12487 10 0 0 python [ 2361] 0 2361 245248 11702 9 0 0 python [ 2362] 0 2362 245248 6751 1 0 0 python [ 2363] 0 2363 245248 10952 2 0 0 python [ 2364] 0 2364 245248 12113 1 0 0 python [ 2365] 0 2365 245248 11258 9 0 0 python [ 2366] 0 2366 245248 9697 10 0 0 python [ 2367] 0 2367 245248 12453 2 0 0 python [ 2368] 0 2368 245248 14357 10 0 0 python [ 2369] 0 2369 245248 11282 10 0 0 python [ 2370] 0 2370 245248 11138 0 0 0 python [ 2371] 0 2371 245248 10615 13 0 0 python [ 2372] 0 2372 245248 10742 2 0 0 python [ 2373] 0 2373 245248 9024 7 0 0 python [ 2374] 0 2374 245248 12176 12 0 0 python [ 2375] 0 2375 245248 13886 10 0 0 python [ 2376] 0 2376 245248 10974 5 0 0 python [ 2377] 0 2377 245248 8416 11 0 0 python [ 2378] 0 2378 245248 9469 11 0 0 python [ 2379] 0 2379 245248 11312 13 0 0 python [ 2380] 0 2380 245248 9317 1 0 0 python [ 2381] 0 2381 245248 10424 0 0 0 python [ 2382] 0 2382 245248 15806 1 0 0 python [ 2383] 0 2383 245248 15340 7 0 0 python [ 2384] 0 2384 245248 7932 9 0 0 python [ 2385] 0 2385 245248 10420 0 0 0 python [ 2386] 0 2386 245248 14376 9 0 0 python [ 2387] 0 2387 245248 12410 2 0 0 python [ 2388] 0 2388 245248 14596 9 0 0 python [ 2389] 0 2389 245248 7898 9 0 0 python [ 2390] 0 2390 245248 10943 10 0 0 python [ 2391] 0 2391 245248 8787 2 0 0 python [ 2392] 0 2392 245248 7252 10 0 0 python [ 2393] 0 2393 245248 12978 15 0 0 python [ 2394] 0 2394 245248 7034 11 0 0 python [ 2395] 0 2395 245248 10903 2 0 0 python [ 2396] 0 2396 245248 10280 10 0 0 python [ 2397] 0 2397 245248 10793 9 0 0 python [ 2398] 0 2398 245248 8205 9 0 0 python [ 2399] 0 2399 245248 9675 0 0 0 python [ 2400] 0 2400 245248 11304 5 0 0 python [ 2401] 0 2401 245248 15053 5 0 0 python [ 2402] 0 2402 245248 14449 10 0 0 python [ 2403] 0 2403 245248 8466 1 0 0 python [ 2404] 0 2404 245248 14250 10 0 0 python [ 2405] 0 2405 245248 11630 9 0 0 python [ 2406] 0 2406 245248 9562 9 0 0 python [ 2407] 0 2407 245248 8802 1 0 0 python [ 2408] 0 2408 245248 9521 1 0 0 python [ 2409] 0 2409 245248 4827 13 0 0 python [ 2410] 0 2410 245248 10364 1 0 0 python [ 2411] 0 2411 245248 8749 0 0 0 python [ 2412] 0 2412 245248 15082 0 0 0 python [ 2413] 0 2413 245248 11023 10 0 0 python [ 2414] 0 2414 245248 9087 1 0 0 python [ 2415] 0 2415 245248 9906 2 0 0 python [ 2416] 0 2416 245248 13862 5 0 0 python [ 2417] 0 2417 245248 9553 2 0 0 python [ 2418] 0 2418 245248 8556 13 0 0 python [ 2419] 0 2419 245248 9246 9 0 0 python [ 2420] 0 2420 245248 11084 2 0 0 python [ 2421] 0 2421 245248 16256 2 0 0 python [ 2422] 0 2422 245248 13057 12 0 0 python [ 2423] 0 2423 245248 10578 7 0 0 python [ 2424] 0 2424 245248 10407 3 0 0 python [ 2425] 0 2425 245248 10329 3 0 0 python [ 2426] 0 2426 245248 9489 9 0 0 python [ 2427] 0 2427 245248 10004 3 0 0 python [ 2428] 0 2428 245248 7411 0 0 0 python [ 2429] 0 2429 245248 13647 1 0 0 python [ 2430] 0 2430 245248 10134 2 0 0 python [ 2431] 0 2431 245248 12157 10 0 0 python [ 2432] 0 2432 245248 11158 1 0 0 python [ 2433] 0 2433 245248 9829 14 0 0 python [ 2434] 0 2434 245248 5859 3 0 0 python [ 2435] 0 2435 245248 11456 9 0 0 python [ 2436] 0 2436 245248 12754 3 0 0 python [ 2437] 0 2437 245248 11098 0 0 0 python [ 2438] 0 2438 245248 10676 0 0 0 python [ 2439] 0 2439 245248 9105 2 0 0 python [ 2440] 0 2440 245248 10539 10 0 0 python [ 2441] 0 2441 245248 11514 10 0 0 python [ 2442] 0 2442 245248 10019 4 0 0 python [ 2443] 0 2443 245248 7545 14 0 0 python [ 2444] 0 2444 245248 11830 10 0 0 python [ 2445] 0 2445 245248 4708 10 0 0 python [ 2446] 0 2446 245248 8227 10 0 0 python [ 2447] 0 2447 245248 6306 10 0 0 python [ 2448] 0 2448 245248 8888 0 0 0 python [ 2449] 0 2449 245248 11337 3 0 0 python [ 2450] 0 2450 245248 4856 0 0 0 python [ 2451] 0 2451 245248 12369 0 0 0 python [ 2452] 0 2452 245248 11077 10 0 0 python [ 2453] 0 2453 245248 6757 0 0 0 python [ 2454] 0 2454 245248 6785 10 0 0 python [ 2455] 0 2455 245248 6532 3 0 0 python [ 2456] 0 2456 245248 6265 9 0 0 python [ 2457] 0 2457 245248 8126 3 0 0 python [ 2458] 0 2458 245248 9573 10 0 0 python [ 2459] 0 2459 245248 6954 10 0 0 python [ 2460] 0 2460 245248 7539 3 0 0 python [ 2461] 0 2461 245248 7623 0 0 0 python [ 2462] 0 2462 245248 4853 2 0 0 python [ 2463] 0 2463 245248 9488 10 0 0 python [ 2464] 0 2464 245248 6415 0 0 0 python [ 2465] 0 2465 245248 9745 1 0 0 python [ 2466] 0 2466 245248 7332 3 0 0 python [ 2467] 0 2467 245248 7408 11 0 0 python [ 2468] 0 2468 245248 8311 0 0 0 python [ 2469] 0 2469 245248 6963 0 0 0 python [ 2470] 0 2470 245248 8620 10 0 0 python [ 2471] 0 2471 245248 5799 10 0 0 python [ 2472] 0 2472 245248 12855 10 0 0 python [ 2473] 0 2473 245248 8718 9 0 0 python [ 2474] 0 2474 245248 6782 2 0 0 python [ 2475] 0 2475 245248 9566 0 0 0 python [ 2476] 0 2476 245248 8083 9 0 0 python [ 2477] 0 2477 245248 8657 10 0 0 python [ 2478] 0 2478 245248 8997 9 0 0 python [ 2479] 0 2479 245248 6539 11 0 0 python [ 2480] 0 2480 245248 8906 9 0 0 python [ 2481] 0 2481 245248 8916 11 0 0 python [ 2482] 0 2482 245248 8083 0 0 0 python [ 2483] 0 2483 245248 9490 7 0 0 python [ 2484] 0 2484 245248 8123 0 0 0 python [ 2485] 0 2485 245248 7315 11 0 0 python [ 2486] 0 2486 245248 9084 4 0 0 python [ 2487] 0 2487 245248 8036 15 0 0 python [ 2488] 0 2488 245248 6839 2 0 0 python [ 2489] 0 2489 245248 9478 11 0 0 python [ 2490] 0 2490 245248 11535 11 0 0 python [ 2491] 0 2491 245248 7895 2 0 0 python [ 2492] 0 2492 245248 8831 0 0 0 python [ 2493] 0 2493 245248 9219 0 0 0 python [ 2494] 0 2494 245248 8472 11 0 0 python [ 2495] 0 2495 245248 6666 1 0 0 python [ 2496] 0 2496 245248 4875 11 0 0 python [ 2497] 0 2497 245248 6802 11 0 0 python [ 2498] 0 2498 245248 4901 9 0 0 python [ 2499] 0 2499 245248 8510 11 0 0 python [ 2500] 0 2500 245248 8620 15 0 0 python [ 2501] 0 2501 245248 7169 10 0 0 python [ 2502] 0 2502 245248 6283 0 0 0 python [ 2503] 0 2503 245248 9497 0 0 0 python [ 2504] 0 2504 245248 10091 2 0 0 python [ 2505] 0 2505 245248 11700 0 0 0 python [ 2506] 0 2506 245248 8353 3 0 0 python [ 2507] 0 2507 245248 8505 2 0 0 python [ 2508] 0 2508 245248 10486 0 0 0 python [ 2509] 0 2509 245248 6641 3 0 0 python [ 2510] 0 2510 245248 7175 10 0 0 python [ 2511] 0 2511 245248 10100 9 0 0 python [ 2512] 0 2512 245248 6984 13 0 0 python [ 2513] 0 2513 245248 7677 13 0 0 python [ 2514] 0 2514 245248 7645 11 0 0 python [ 2515] 0 2515 245248 8854 4 0 0 python [ 2516] 0 2516 245248 6888 0 0 0 python [ 2517] 0 2517 245248 6297 11 0 0 python [ 2518] 0 2518 245248 8011 11 0 0 python [ 2519] 0 2519 245248 6353 10 0 0 python [ 2520] 0 2520 245248 5168 9 0 0 python [ 2521] 0 2521 245248 7274 11 0 0 python [ 2522] 0 2522 245248 6374 11 0 0 python [ 2523] 0 2523 245248 9404 1 0 0 python [ 2524] 0 2524 245248 7486 0 0 0 python [ 2525] 0 2525 245248 7290 10 0 0 python [ 2526] 0 2526 245248 5940 0 0 0 python [ 2527] 0 2527 245248 7999 10 0 0 python [ 2528] 0 2528 245248 8201 0 0 0 python [ 2529] 0 2529 245248 8065 0 0 0 python [ 2530] 0 2530 245248 6452 9 0 0 python [ 2531] 0 2531 245248 6162 11 0 0 python [ 2532] 0 2532 245248 6808 0 0 0 python [ 2533] 0 2533 245248 4331 2 0 0 python [ 2534] 0 2534 245248 6458 0 0 0 python [ 2535] 0 2535 245248 3250 0 0 0 python [ 2536] 0 2536 245248 5289 9 0 0 python [ 2537] 0 2537 245248 9369 13 0 0 python [ 2538] 0 2538 245248 9187 15 0 0 python [ 2539] 0 2539 245248 8274 0 0 0 python [ 2540] 0 2540 245248 8051 2 0 0 python [ 2541] 0 2541 245248 4732 4 0 0 python [ 2542] 0 2542 245248 4662 0 0 0 python [ 2543] 0 2543 245248 12070 0 0 0 python [ 2546] 0 2546 245248 6923 4 0 0 python [ 2547] 0 2547 245248 4550 0 0 0 python [ 2548] 0 2548 245248 4700 12 0 0 python [ 2549] 0 2549 245248 5822 11 0 0 python [ 2550] 0 2550 245248 6179 10 0 0 python [ 2551] 0 2551 245248 7794 0 0 0 python [ 2552] 0 2552 245248 6456 10 0 0 python [ 2553] 0 2553 245248 4932 4 0 0 python [ 2554] 0 2554 245248 7680 11 0 0 python [ 2555] 0 2555 245248 1642 10 0 0 python [ 2556] 0 2556 245248 7480 10 0 0 python [ 2557] 0 2557 245248 3598 0 0 0 python [ 2558] 0 2558 245248 7949 0 0 0 python [ 2559] 0 2559 245248 4294 0 0 0 python [ 2560] 0 2560 245248 5138 0 0 0 python [ 2561] 0 2561 245248 11045 9 0 0 python [ 2562] 0 2562 245248 4290 9 0 0 python [ 2563] 0 2563 245248 7603 0 0 0 python [ 2564] 0 2564 245248 8683 12 0 0 python [ 2565] 0 2565 245248 6409 12 0 0 python [ 2566] 0 2566 245248 8321 9 0 0 python [ 2567] 0 2567 245248 7416 0 0 0 python [ 2568] 0 2568 245248 5272 2 0 0 python [ 2569] 0 2569 245248 7359 10 0 0 python [ 2570] 0 2570 245248 4641 9 0 0 python [ 2571] 0 2571 245248 7698 2 0 0 python [ 2572] 0 2572 245248 6118 11 0 0 python [ 2573] 0 2573 245248 4822 0 0 0 python [ 2574] 0 2574 245248 4745 0 0 0 python [ 2575] 0 2575 245248 8029 0 0 0 python [ 2576] 0 2576 245248 6350 9 0 0 python [ 2577] 0 2577 245248 5537 9 0 0 python [ 2578] 0 2578 245248 6861 3 0 0 python [ 2579] 0 2579 245248 5632 4 0 0 python [ 2580] 0 2580 245248 6023 0 0 0 python [ 2581] 0 2581 245248 7947 11 0 0 python [ 2582] 0 2582 245248 6752 9 0 0 python [ 2583] 0 2583 245248 4282 12 0 0 python [ 2584] 0 2584 245248 6069 4 0 0 python [ 2585] 0 2585 245248 5472 11 0 0 python [ 2586] 0 2586 245248 4729 0 0 0 python [ 2587] 0 2587 245248 8205 0 0 0 python [ 2588] 0 2588 245248 6234 10 0 0 python [ 2589] 0 2589 245248 7687 11 0 0 python [ 2590] 0 2590 245248 8817 11 0 0 python [ 2591] 0 2591 245248 5784 11 0 0 python [ 2592] 0 2592 245248 7518 10 0 0 python [ 2593] 0 2593 245248 7213 12 0 0 python [ 2594] 0 2594 245248 9752 3 0 0 python [ 2595] 0 2595 245248 7039 0 0 0 python [ 2596] 0 2596 245248 8164 0 0 0 python [ 2597] 0 2597 245248 4113 11 0 0 python [ 2598] 0 2598 245248 4153 0 0 0 python [ 2599] 0 2599 245248 6651 11 0 0 python [ 2600] 0 2600 245248 3933 9 0 0 python [ 2601] 0 2601 245248 7722 14 0 0 python [ 2602] 0 2602 245248 7535 4 0 0 python [ 2603] 0 2603 245248 4903 2 0 0 python [ 2604] 0 2604 245248 5542 0 0 0 python [ 2605] 0 2605 245248 4589 10 0 0 python [ 2606] 0 2606 245248 7672 2 0 0 python [ 2607] 0 2607 245248 6656 2 0 0 python [ 2608] 0 2608 245248 6467 2 0 0 python [ 2609] 0 2609 245248 8780 0 0 0 python [ 2610] 0 2610 245248 11257 0 0 0 python [ 2611] 0 2611 245248 6748 0 0 0 python [ 2612] 0 2612 245248 8885 11 0 0 python [ 2613] 0 2613 245248 4232 0 0 0 python [ 2614] 0 2614 245248 5724 11 0 0 python [ 2615] 0 2615 245248 2842 11 0 0 python [ 2616] 0 2616 245248 4994 15 0 0 python [ 2617] 0 2617 245248 5417 11 0 0 python [ 2618] 0 2618 245248 4660 0 0 0 python [ 2619] 0 2619 245248 5655 11 0 0 python [ 2620] 0 2620 245248 5952 0 0 0 python [ 2621] 0 2621 245248 6983 11 0 0 python [ 2622] 0 2622 245248 6066 12 0 0 python [ 2623] 0 2623 245248 7743 11 0 0 python [ 2624] 0 2624 245248 3138 11 0 0 python [ 2625] 0 2625 245248 6144 0 0 0 python [ 2626] 0 2626 245248 5238 9 0 0 python [ 2627] 0 2627 245248 9371 11 0 0 python [ 2628] 0 2628 245248 13048 10 0 0 python [ 2629] 0 2629 245248 6702 3 0 0 python [ 2630] 0 2630 245248 5319 10 0 0 python [ 2631] 0 2631 245248 7964 0 0 0 python [ 2632] 0 2632 245248 5787 14 0 0 python [ 2633] 0 2633 245248 9816 0 0 0 python [ 2634] 0 2634 245248 5415 6 0 0 python [ 2635] 0 2635 245248 6740 3 0 0 python [ 2636] 0 2636 245248 10180 3 0 0 python [ 2637] 0 2637 245248 5007 11 0 0 python [ 2638] 0 2638 245248 5801 9 0 0 python [ 2639] 0 2639 245248 7823 3 0 0 python [ 2640] 0 2640 245248 9127 0 0 0 python [ 2641] 0 2641 245248 5614 0 0 0 python [ 2642] 0 2642 245248 4686 10 0 0 python [ 2643] 0 2643 245248 4305 11 0 0 python [ 2644] 0 2644 245248 4714 2 0 0 python [ 2645] 0 2645 245248 5964 11 0 0 python [ 2646] 0 2646 245248 7440 10 0 0 python [ 2647] 0 2647 245248 6062 4 0 0 python [ 2648] 0 2648 245248 5733 6 0 0 python [ 2649] 0 2649 245248 5063 0 0 0 python [ 2650] 0 2650 245248 4793 2 0 0 python [ 2651] 0 2651 245248 5806 4 0 0 python [ 2652] 0 2652 245248 8126 10 0 0 python [ 2653] 0 2653 245248 5794 3 0 0 python [ 2654] 0 2654 245248 4370 12 0 0 python [ 2655] 0 2655 245248 5621 0 0 0 python [ 2656] 0 2656 245248 6514 11 0 0 python [ 2657] 0 2657 245248 6560 3 0 0 python [ 2658] 0 2658 245248 7352 2 0 0 python [ 2659] 0 2659 245248 4456 0 0 0 python [ 2660] 0 2660 245248 6508 3 0 0 python [ 2661] 0 2661 245248 4231 4 0 0 python [ 2662] 0 2662 245248 5967 0 0 0 python [ 2663] 0 2663 245248 5007 3 0 0 python [ 2664] 0 2664 245248 5878 3 0 0 python [ 2665] 0 2665 245248 7469 11 0 0 python [ 2666] 0 2666 245248 4697 4 0 0 python [ 2667] 0 2667 245248 3484 11 0 0 python [ 2668] 0 2668 245248 4223 3 0 0 python [ 2669] 0 2669 245248 10490 10 0 0 python [ 2670] 0 2670 245248 3395 3 0 0 python [ 2671] 0 2671 245248 7004 12 0 0 python [ 2672] 0 2672 245248 6340 0 0 0 python [ 2673] 0 2673 245248 3384 0 0 0 python [ 2674] 0 2674 245248 5563 0 0 0 python [ 2675] 0 2675 245248 4799 14 0 0 python [ 2676] 0 2676 245248 10170 15 0 0 python [ 2677] 0 2677 245248 4793 10 0 0 python [ 2678] 0 2678 245248 6221 0 0 0 python [ 2679] 0 2679 245248 4710 10 0 0 python [ 2680] 0 2680 245248 6231 0 0 0 python [ 2681] 0 2681 245248 3573 3 0 0 python [ 2682] 0 2682 245248 3332 0 0 0 python [ 2683] 0 2683 245248 6929 2 0 0 python [ 2684] 0 2684 245248 6015 11 0 0 python [ 2685] 0 2685 245248 5167 14 0 0 python [ 2688] 0 2688 245248 5195 2 0 0 python [ 2689] 0 2689 245248 5293 2 0 0 python [ 2690] 0 2690 245248 4398 10 0 0 python [ 2691] 0 2691 245248 4672 11 0 0 python [ 2692] 0 2692 245248 5772 6 0 0 python [ 2693] 0 2693 245248 4550 2 0 0 python [ 2694] 0 2694 245248 6926 0 0 0 python [ 2695] 0 2695 245248 3137 2 0 0 python [ 2696] 0 2696 245248 4804 10 0 0 python [ 2697] 0 2697 245248 7152 0 0 0 python [ 2698] 0 2698 245248 3031 3 0 0 python [ 2699] 0 2699 245248 6700 0 0 0 python [ 2700] 0 2700 245248 4299 6 0 0 python [ 2701] 0 2701 245248 3678 0 0 0 python [ 2702] 0 2702 245248 4665 0 0 0 python [ 2703] 0 2703 245248 5555 5 0 0 python [ 2704] 0 2704 245248 5672 0 0 0 python [ 2705] 0 2705 245248 3480 0 0 0 python [ 2706] 0 2706 245248 4387 10 0 0 python [ 2707] 0 2707 245248 4539 0 0 0 python [ 2708] 0 2708 245248 3206 11 0 0 python [ 2711] 0 2711 245248 6383 10 0 0 python [ 2712] 0 2712 245248 6077 2 0 0 python [ 2713] 0 2713 245248 4819 0 0 0 python [ 2714] 0 2714 245248 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python [ 3135] 0 3135 41834 474 2 0 0 python [ 3136] 0 3136 245248 217 1 0 0 python [ 3139] 0 3139 245248 215 11 0 0 python [ 3140] 0 3140 245248 214 1 0 0 python [ 3141] 0 3141 245248 215 3 0 0 python [ 3142] 0 3142 245248 216 1 0 0 python [ 3143] 0 3143 245248 215 7 0 0 python [ 3144] 0 3144 245248 217 10 0 0 python [ 3145] 0 3145 245248 216 12 0 0 python [ 3146] 0 3146 41834 140 2 0 0 python [ 3157] 0 3157 41834 140 0 0 0 python [ 3158] 0 3158 41834 127 3 0 0 python [ 3159] 0 3159 41834 133 2 0 0 python [ 3160] 0 3160 41834 123 3 0 0 python [ 3161] 0 3161 41834 117 3 0 0 python [ 3162] 0 3162 41834 113 3 0 0 python [ 3164] 0 3164 41834 107 1 0 0 python [ 3166] 0 3166 41834 98 3 0 0 python Out of memory: Kill process 2103 (mingetty) score 1 or sacrifice child Killed process 2103 (mingetty) total-vm:4100kB, anon-rss:0kB, file-rss:0kB python invoked oom-killer: gfp_mask=0x201da, order=0, oom_adj=0, oom_score_adj=0 python cpuset=/ mems_allowed=0-1 Out of memory: Kill process 3246 (agetty) score 1 or sacrifice child Killed process 3246 (agetty) total-vm:4116kB, anon-rss:72kB, file-rss:0kB init: tty (init: tty (/devinit: tty (/dev/tty4) main process (3169) killed by KILL signal init: tty (/dev/tty4) main process ended, respawning init: tty (/dev/tty5) main process (3170) killed by KILL signal init: tty (/dev/tty5) main process ended, respawning init: tty (/dev/tty6) main process (3171) killed by KILL signal init: tty (/dev/tty6) main process ended, respawning init: serial (ttyS0) main process (3246) killed by KILL signal init: serial (ttyS0) main process ended, respawning > I'm indifferent to the actual scale of OOM_SCORE_MAX_FACTOR; it could > be > 10 as proposed in this patch or even increased higher for higher > resolution. > > > diff --git a/mm/oom_kill.c b/mm/oom_kill.c > --- a/mm/oom_kill.c > +++ b/mm/oom_kill.c > @@ -38,6 +38,9 @@ int sysctl_oom_kill_allocating_task; > int sysctl_oom_dump_tasks = 1; > static DEFINE_SPINLOCK(zone_scan_lock); > > +#define OOM_SCORE_MAX_FACTOR 10 > +#define OOM_SCORE_MAX (OOM_SCORE_ADJ_MAX * OOM_SCORE_MAX_FACTOR) > + > #ifdef CONFIG_NUMA > /** > * has_intersects_mems_allowed() - check task eligiblity for kill > @@ -160,7 +163,7 @@ unsigned int oom_badness(struct task_struct *p, > struct mem_cgroup *mem, > */ > if (p->flags & PF_OOM_ORIGIN) { > task_unlock(p); > - return 1000; > + return OOM_SCORE_MAX; > } > > /* > @@ -177,32 +180,38 @@ unsigned int oom_badness(struct task_struct *p, > struct mem_cgroup *mem, > points = get_mm_rss(p->mm) + p->mm->nr_ptes; > points += get_mm_counter(p->mm, MM_SWAPENTS); > > - points *= 1000; > + points *= OOM_SCORE_MAX; > points /= totalpages; > task_unlock(p); > > /* > - * Root processes get 3% bonus, just like the __vm_enough_memory() > - * implementation used by LSMs. > + * Root processes get a bonus of 1% per 10% of memory used. > */ > - if (has_capability_noaudit(p, CAP_SYS_ADMIN)) > - points -= 30; > + if (has_capability_noaudit(p, CAP_SYS_ADMIN)) { > + int bonus; > + int granularity; > + > + bonus = OOM_SCORE_MAX / 100; /* bonus is 1% */ > + granularity = OOM_SCORE_MAX / 10; /* granularity is 10% */ > + > + points -= bonus * (points / granularity); > + } > > /* > * /proc/pid/oom_score_adj ranges from -1000 to +1000 such that it may > * either completely disable oom killing or always prefer a certain > * task. > */ > - points += p->signal->oom_score_adj; > + points += p->signal->oom_score_adj * OOM_SCORE_MAX_FACTOR; > > /* > * Never return 0 for an eligible task that may be killed since it's > - * possible that no single user task uses more than 0.1% of memory > and > + * possible that no single user task uses more than 0.01% of memory > and > * no single admin tasks uses more than 3.0%. > */ > if (points <= 0) > return 1; > - return (points < 1000) ? points : 1000; > + return (points < OOM_SCORE_MAX) ? points : OOM_SCORE_MAX; > } > > /* > @@ -314,7 +323,7 @@ static struct task_struct > *select_bad_process(unsigned int *ppoints, > */ > if (p == current) { > chosen = p; > - *ppoints = 1000; > + *ppoints = OOM_SCORE_MAX; > } else { > /* > * If this task is not being ptraced on exit, -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . 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