{"id":79,"date":"2026-06-05T09:28:52","date_gmt":"2026-06-05T09:28:52","guid":{"rendered":"https:\/\/www.skillnotes.cloud\/?p=79"},"modified":"2026-06-05T09:56:25","modified_gmt":"2026-06-05T09:56:25","slug":"%e9%85%8d%e7%bd%aekdump%e5%92%8c%e5%86%85%e6%a0%b8dump%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"https:\/\/www.skillnotes.cloud\/?p=79","title":{"rendered":"\u914d\u7f6ekdump\u548c\u5185\u6838dump\u5206\u6790"},"content":{"rendered":"\n<ul class=\"wp-block-list\">\n<li>\u542f\u7528pstore\u4fdd\u5b58\u7cfb\u7edf\u5728shutdown\u4e4b\u524d\u7684log<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6dfb\u52a0\u542f\u52a8\u53c2\u6570 printk.always_kmsg_dump=Y reserve_mem=2M:4096:oops pstore.backend=ramoops ramoops.mem_name=oops<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u914d\u7f6e\u4e86systemd-pstore.service\u7684\u60c5\u51b5\u4e0b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">pstore\u7684\u6570\u636e\u4fdd\u5b58\u5728 \/var\/lib\/systemd\/pstore\/* <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u539f\u59cb\u6570\u636e\u4fdd\u5b58\u5728 \/sys\/kernel\/pstore\/<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u914d\u7f6ekdump <\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u914d\u7f6ekdump\u5185\u6838\u542f\u52a8\u53c2\u6570 <\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>crashkernel=2G-64G:256M,64G-:512M <\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u542f\u52a8\u65f6\u5185\u6838\u6839\u636e\u6b64\u914d\u7f6e\u9884\u7559kexec\u52a0\u8f7d\u5185\u6838\u548cinitramfs\u5185\u5b58<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b64\u53c2\u6570\u4f1a\u88abkdump.service\u81ea\u52a8\u914d\u7f6e\u8986\u76d6\uff0c\u9700\u8981\u4fee\u6539\/etc\/kdump.conf \u5728\u4e0d\u4f7f\u7528\u81ea\u52a8\u914d\u7f6e\u7684\u60c5\u51b5\u4e0b\uff0c\u9700\u8981\u7981\u7528auto_reset_crashkernel<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>....\nauto_reset_crashkernel no\npath \/var\/crash\ncore_collector makedumpfile -l --message-level 7 -d 31\nfailure_action shell\nfinal_action reboot\n....<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">kdump.service \u9ed8\u8ba4\u4f7f\u7528dracut\u751f\u6210kexec \u542f\u52a8\u5185\u6838\u4f7f\u7528\u7684initramfs\uff0c \u548c\u5b89\u88c5\u5185\u6838\u65f6\u4f7f\u7528\u7684\u65b9\u6cd5\u76f8\u540c\uff0c dracut\u4f1a\u6839\u636e\u914d\u7f6e\u6587\u4ef6\u4ece\u6839\u6587\u4ef6\u7cfb\u7edf\u6536\u96c6\u542f\u52a8\u65f6\u9700\u8981\u7684ramdisk\u5185\u5bb9\u548c\u5185\u6838\u6a21\u5757<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u914d\u7f6e\u5b8c\u6210\u4f7f\u7528<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>systemctl restart kdump.service<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5145\u6c14kdump\u670d\u52a1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f7f\u7528kdumpctl \u6d4b\u8bd5\u914d\u7f6e\u662f\u5426\u6210\u529f<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>kdumpctl test<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6d4b\u8bd5\u4f1a\u89e6\u53d1panic\uff0c\u7531\u4e8ekdump\u4f1a\u4f7f\u7528kexec \u5c06\u5185\u6838\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\uff0c\u5728panic\u65f6\u4f1a\u81ea\u52a8\u52a0\u8f7d\u65b0\u5185\u6838\u5e76\u5728kexec\u7684\u5185\u6838\u8fd0\u884cmakedumpfile \u5c06\/proc\/vmcore \u7684\u5185\u5bb9\u4fdd\u5b58\u5728\u78c1\u76d8\u6216\u8005\u6536\u96c6kdump\u7684\u670d\u52a1\u5668<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6dfb\u52a0\u542f\u52a8\u53c2\u6570 printk.always_kmsg_dump=Y reserve_mem=2M:4096:oo [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-79","post","type-post","status-publish","format-standard","hentry","category-linux"],"_links":{"self":[{"href":"https:\/\/www.skillnotes.cloud\/index.php?rest_route=\/wp\/v2\/posts\/79","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.skillnotes.cloud\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.skillnotes.cloud\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.skillnotes.cloud\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.skillnotes.cloud\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=79"}],"version-history":[{"count":1,"href":"https:\/\/www.skillnotes.cloud\/index.php?rest_route=\/wp\/v2\/posts\/79\/revisions"}],"predecessor-version":[{"id":80,"href":"https:\/\/www.skillnotes.cloud\/index.php?rest_route=\/wp\/v2\/posts\/79\/revisions\/80"}],"wp:attachment":[{"href":"https:\/\/www.skillnotes.cloud\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=79"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.skillnotes.cloud\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=79"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.skillnotes.cloud\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=79"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}