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Add setting of oom_score_adj (#1504)
Add setting of oom_score_adj (#1504)
To limit risk of killing by OOM Killer.pull/1505/head
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3 changed files with 119 additions and 1 deletions
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25src/mergerfs.cpp
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68src/oom.cpp
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27src/oom.hpp
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/*
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ISC License |
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Copyright (c) 2025, Antonio SJ Musumeci <trapexit@spawn.link> |
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Permission to use, copy, modify, and/or distribute this software for any |
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purpose with or without fee is hereby granted, provided that the above |
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copyright notice and this permission notice appear in all copies. |
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include "oom.hpp"
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#include "fs_exists.hpp"
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#include "fmt/core.h"
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#include <fstream>
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#include <tuple>
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constexpr char SELF_OOM_SCORE_ADJ[] = "/proc/self/oom_score_adj"; |
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bool |
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oom::has_oom_score_adj() |
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{ |
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return fs::exists(SELF_OOM_SCORE_ADJ); |
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} |
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int |
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oom::get_oom_score_adj() |
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{ |
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int score; |
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std::ifstream ifs; |
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ifs.open(SELF_OOM_SCORE_ADJ); |
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if(!ifs) |
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return 0; |
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ifs >> score; |
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ifs.close(); |
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return score; |
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} |
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int |
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oom::set_oom_score_adj(const int score_) |
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{ |
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std::ofstream ofs; |
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ofs.open(SELF_OOM_SCORE_ADJ); |
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if(!ofs) |
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return -errno; |
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ofs << fmt::format("{}",score_); |
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ofs.close(); |
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return 0; |
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} |
@ -0,0 +1,27 @@ |
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/*
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ISC License |
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|
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Copyright (c) 2025, Antonio SJ Musumeci <trapexit@spawn.link> |
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|
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Permission to use, copy, modify, and/or distribute this software for any |
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purpose with or without fee is hereby granted, provided that the above |
|||
copyright notice and this permission notice appear in all copies. |
|||
|
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
|||
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
|||
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
|||
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
|||
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
|||
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#pragma once
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namespace oom |
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{ |
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bool has_oom_score_adj(); |
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int get_oom_score_adj(); |
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int set_oom_score_adj(const int score); |
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}; |
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