{"id":36877,"date":"2019-10-31T22:14:28","date_gmt":"2019-10-31T19:14:28","guid":{"rendered":"https:\/\/prohoster.info\/blog\/yadro-linux-ne-mozhet-myagko-obrabatyvat-situatsii-s-nehvatkoj-pamyati\/"},"modified":"2019-10-31T22:14:28","modified_gmt":"2019-10-31T19:14:28","slug":"yadro-linux-ne-mozhet-myagko-obrabatyvat-situatsii-s-nehvatkoj-pamyati","status":"publish","type":"post","link":"https:\/\/prohoster.info\/fr\/blog\/news\/yadro-linux-ne-mozhet-myagko-obrabatyvat-situatsii-s-nehvatkoj-pamyati","title":{"rendered":"Le noyau Linux ne peut pas g\u00e9rer en douceur les situations de manque de m\u00e9moire","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Dans la liste de diffusion des d\u00e9veloppeurs du noyau Linux <noindex><a rel=\"nofollow\" href=\"https:\/\/lkml.org\/lkml\/2019\/8\/4\/15\">la question a \u00e9t\u00e9 soulev\u00e9e<\/a><\/noindex> concernant le traitement des situations d'\u00e9puisement de la m\u00e9moire libre dans Linux :<\/p>\n<blockquote>\n<p>Un probl\u00e8me connu qui perturbe de nombreuses personnes depuis des ann\u00e9es et qui peut \u00eatre reproduit en moins de quelques minutes sur la derni\u00e8re version du noyau Linux 5.2.6. Tous les param\u00e8tres du noyau sont configur\u00e9s avec les valeurs par d\u00e9faut.<\/p>\n<p>\u00c9tapes :<\/p>\n<ul>\n<li class=\"l\"> Nous chargeons avec le param\u00e8tre \u00ab mem=4G \u00bb.\n<li class=\"l\"> D\u00e9sactivez le support de l'\u00e9change (sudo swapoff -a).\n<li class=\"l\"> Lancez n'importe quel navigateur web, par exemple, Chrome\/Chromium ou\/et Firefox.\n<li class=\"l\"> Commencez \u00e0 ouvrir des onglets avec des sites et observez comment la m\u00e9moire libre diminue.\n<\/ul>\n<p>D\u00e8s qu'une situation se pr\u00e9sente o\u00f9 un nouvel onglet n\u00e9cessite plus de m\u00e9moire vive que disponible, le syst\u00e8me se fige pratiquement compl\u00e8tement. Vous aurez m\u00eame du mal \u00e0 d\u00e9placer le curseur de la souris. Le t\u00e9moin de disque clignotera sans interruption (je ne comprends pas pourquoi). Vous ne pourrez pas lancer de nouvelles applications ni fermer celles d\u00e9j\u00e0 ouvertes.<\/p>\n<p>Cette petite crise peut durer quelques minutes ou plus longtemps. Je suppose que le syst\u00e8me ne devrait pas se comporter ainsi. Je pense qu'il faut faire quelque chose pour \u00e9viter ces \u00ab blocages \u00bb.<\/p>\n<p>Je suis presque s\u00fbr qu'il est possible de modifier certains param\u00e8tres sysctl pour \u00e9viter de telles situations, mais quelque chose me dit que cela devrait \u00eatre fait par d\u00e9faut pour tout le monde, car les utilisateurs non techniques, face \u00e0 ce probl\u00e8me, vont simplement abandonner Linux et ne vont pas chercher des solutions sur Google.\n<\/p><\/blockquote>\n<p>Dans <noindex><a rel=\"nofollow\" href=\"https:\/\/www.reddit.com\/r\/linux\/comments\/cmg48b\/lets_talk_about_the_elephant_in_the_room_the\/\">commentaires<\/a><\/noindex> Sur Reddit, certains utilisateurs sugg\u00e8rent d'activer l'\u00e9change, mais cela ne r\u00e9sout pas le probl\u00e8me, cela le repousse simplement et l'aggrave souvent. Une solution possible \u00e0 l'avenir pourrait impliquer la sous-syst\u00e8me nouvellement apparue dans le noyau <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=49842\">4.20<\/a><\/noindex> et am\u00e9lior\u00e9e dans le noyau <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51051\">5.2<\/a><\/noindex> PSI (Pressure Stall Information), qui permet d'analyser l'information sur le temps d'attente pour obtenir diverses ressources (CPU, m\u00e9moire, entr\u00e9e\/sortie). Ce sous-syst\u00e8me permet d'organiser le suivi du manque de m\u00e9moire \u00e0 un stade pr\u00e9coce, de d\u00e9terminer la source des probl\u00e8mes et de terminer des applications non essentielles sans causer d'effets notables pour l'utilisateur. <\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Source : <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51231\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u0441\u043f\u0438\u0441\u043a\u0435 \u0440\u0430\u0441\u0441\u044b\u043b\u043a\u0438 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 \u044f\u0434\u0440\u0430 Linux \u043f\u043e\u0434\u043d\u044f\u0442\u0430 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0441 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u043e\u0439 \u0441\u0438\u0442\u0443\u0430\u0446\u0438\u0438 \u0438\u0441\u0447\u0435\u0440\u043f\u0430\u043d\u0438\u044f \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438 \u0432 Linux: \u0418\u0437\u0432\u0435\u0441\u0442\u043d\u0430 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0434\u043e\u043d\u0438\u043c\u0430\u0435\u0442 \u043c\u043d\u043e\u0436\u0435\u0441\u0442\u0432\u043e \u043b\u044e\u0434\u0435\u0439 \u043d\u0430 \u043f\u0440\u043e\u0442\u044f\u0436\u0435\u043d\u0438\u0438 \u043c\u043d\u043e\u0433\u0438\u0445 \u043b\u0435\u0442 \u0438 \u043a\u043e\u0442\u043e\u0440\u0443\u044e \u043c\u043e\u0436\u043d\u043e \u0432\u043e\u0441\u043f\u0440\u043e\u0438\u0437\u0432\u0435\u0441\u0442\u0438 \u043c\u0435\u043d\u044c\u0448\u0435, \u0447\u0435\u043c \u0437\u0430 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u043c\u0438\u043d\u0443\u0442 \u043d\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 \u044f\u0434\u0440\u0430 Linux 5.2.6. \u0412\u0441\u0435 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u044b \u044f\u0434\u0440\u0430 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u044b \u0432 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e. \u0428\u0430\u0433\u0438: \u0417\u0430\u0433\u0440\u0443\u0436\u0430\u0435\u043c\u0441\u044f \u0441 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u043e\u043c &#171;mem=4G&#187;. \u0412\u044b\u043a\u043b\u044e\u0447\u0430\u0435\u043c [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-36877","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One 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