<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:content="http://purl.org/rss/1.0/modules/content/"><channel><title>内核 on 文叨叨 | IaaS 排障手记</title><link>/tags/%E5%86%85%E6%A0%B8/</link><description>Recent content in 内核 on 文叨叨 | IaaS 排障手记</description><generator>Hugo</generator><language>zh-cn</language><lastBuildDate>Sun, 14 Jun 2026 10:00:00 +0800</lastBuildDate><atom:link href="/tags/%E5%86%85%E6%A0%B8/index.xml" rel="self" type="application/rss+xml"/><item><title>虚拟机无响应？重启后快速进 console 看内核日志</title><link>/posts/vm-no-response-restart-console/</link><pubDate>Sun, 14 Jun 2026 10:00:00 +0800</pubDate><guid>/posts/vm-no-response-restart-console/</guid><description>virsh console 卡住进不去，虚拟机无响应。一个思路是重启后快速进入 console，看内核启动日志，往往能发现关键线索。</description></item><item><title>清理网卡前先清理相关资源：unregister_netdevice 的坑</title><link>/posts/cleanup-netdev-before-down/</link><pubDate>Sat, 13 Jun 2026 10:00:00 +0800</pubDate><guid>/posts/cleanup-netdev-before-down/</guid><description>LXC 销毁后 hyper 内核报 unregister_netdevice 网卡错误，很久没解决。最后在网卡 down 后加了一个 disable_ipv6 的操作就好了。</description></item><item><title>热迁移后虚拟机卡死：CPU 100% 的时间中断死循环</title><link>/posts/migrate-vm-hang-cpu-100/</link><pubDate>Sat, 06 Jun 2026 10:00:00 +0800</pubDate><guid>/posts/migrate-vm-hang-cpu-100/</guid><description>从 Ubuntu 20 宿主机迁移到 Ubuntu 22 宿主机后，虚拟机卡死、CPU 占用 100%。用 crash 和 perf 定位到时间中断处理死循环，根因是热迁移过程中的时间处理问题。</description></item></channel></rss>