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Date: Thu, 26 May 2011 03:08:33 -0400 (EDT)
From: CAI Qian <caiqian@redhat.com>
To: David Rientjes <rientjes@google.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        Andrew Morton <akpm@linux-foundation.org>, hughd@google.com,
        kamezawa hiroyu <kamezawa.hiroyu@jp.fujitsu.com>,
        minchan kim <minchan.kim@gmail.com>, oleg@redhat.com,
        KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
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In-Reply-To: <alpine.DEB.2.00.1105231547060.17840@chino.kir.corp.google.com>
Subject: Re: [PATCH 3/5] oom: oom-killer don't use proportion of system-ram
 internally
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----- 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
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[ 3065]     0  3065   245248     1350   6       0             0 python
[ 3066]     0  3066   245248     1769   9       0             0 python
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[ 3076]     0  3076   245248      216   3       0             0 python
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[ 3080]     0  3080   245248     1764  10       0             0 python
[ 3081]     0  3081   245248     1769  13       0             0 python
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[ 3086]     0  3086   245248     2282   9       0             0 python
[ 3087]     0  3087   245248     2771   4       0             0 python
[ 3088]     0  3088   245248     3839   3       0             0 python
[ 3089]     0  3089   245248     2271  11       0             0 python
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[ 3093]     0  3093   245248     1768   2       0             0 python
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[ 3095]     0  3095   245248     2283   9       0             0 python
[ 3096]     0  3096   245248     1314  10       0             0 python
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[ 3098]     0  3098   245248     1770   2       0             0 python
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[ 3100]     0  3100   245248     2338   9       0             0 python
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[ 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,
--
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