{"id":1296,"date":"2011-10-18T15:47:04","date_gmt":"2011-10-18T13:47:04","guid":{"rendered":"http:\/\/michauko.org\/blog\/?p=1296"},"modified":"2011-10-18T15:47:04","modified_gmt":"2011-10-18T13:47:04","slug":"cifs-vfs-no-response-for-cmd-50-mid-xxx","status":"publish","type":"post","link":"https:\/\/michauko.org\/blog\/cifs-vfs-no-response-for-cmd-50-mid-xxx-1296\/","title":{"rendered":"CIFS VFS: No response for cmd 50 mid xxx"},"content":{"rendered":"<p>Sur une machine Debian Squeeze virtualis\u00e9e, kernel 2.6.28, depuis quelques jours, une tonne de messages type <code>Oct 18 00:20:59 mamachine kernel: [1870080.158744]  CIFS VFS: No response for cmd 50 mid 10251<\/code>. Au-del\u00e0 des messages, toutes les manipulations de fichiers sur des partages Samba fonctionnaient curieusement : transferts de fichiers interrompus, cr\u00e9ations de r\u00e9pertoires quand \u00e7a voulait etc.<\/p>\n<p>Sur Internet, on trouve de la prose indiquant que \u00e7a peut se r\u00e9gler en d\u00e9sactivant le \u00ab\u00a0Opportunistic Locking\u00a0\u00bb, concr\u00e8tement en faisant un <code>echo 0 > \/proc\/fs\/cifs\/OplockEnabled<\/code> bien bourrin, moyennant une vague perte de performance (je n&rsquo;ai pas mesur\u00e9).<br \/>\nCa n&rsquo;aura pas suffit.<\/p>\n<p>Comme j&rsquo;ai vu passer, il me semble, des mises \u00e0 jour samba il y a peu de temps, \u00e7a sentait la modif r\u00e9cente (chez MS, ou pas et r\u00e9percut\u00e9e dans Samba) et le kernel un peu trop vieux pour que tout \u00e7a marche bien. R\u00e9sultat, apr\u00e8s une mise \u00e0 jour du noyau en 2.6.39 (backport), en mettant tout de m\u00eame le \u00ab\u00a0OplockEnabled\u00a0\u00bb \u00e0 0 (j&rsquo;avoue que je n&rsquo;ai pas test\u00e9 sans), le probl\u00e8me a disparu.<\/p>\n<p>Un copain me souffle de mettre <code>fs.cifs.OplockEnabled=0<\/code> dans <code>\/etc\/sysctl.d\/local.conf<\/code> plut\u00f4t que l&rsquo;\u00e9ternel <code>echo 0 > \/proc...<\/code> dans le <code>rc.local<\/code>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Sur une machine Debian Squeeze virtualis\u00e9e, kernel 2.6.28, depuis quelques jours, une tonne de messages type Oct 18 00:20:59 mamachine kernel: [1870080.158744] CIFS VFS: No response for cmd 50 mid 10251. Au-del\u00e0 des messages, toutes &hellip;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[9,2,82],"tags":[424,510,286,511,423],"class_list":["post-1296","post","type-post","status-publish","format-standard","hentry","category-bugs","category-debian","category-pl","tag-cifs","tag-cifs-vfs","tag-kernel","tag-oplockenabled","tag-samba"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>CIFS VFS: No response for cmd 50 mid xxx - Le blog de Michauko<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/michauko.org\/blog\/cifs-vfs-no-response-for-cmd-50-mid-xxx-1296\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CIFS VFS: No response for cmd 50 mid xxx - Le blog de Michauko\" \/>\n<meta property=\"og:description\" content=\"Sur une machine Debian Squeeze virtualis\u00e9e, kernel 2.6.28, depuis quelques jours, une tonne de messages type Oct 18 00:20:59 mamachine kernel: [1870080.158744] CIFS VFS: No response for cmd 50 mid 10251. 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