红帽全球峰会19.3. 禁用 kdump 服务
要在引导时禁用 kdump 服务，请按照以下步骤操作。
先决条件
-
满足
kdump配置和目标的要求。详情请查看支持的 kdump 配置和目标。 -
安装
kdump的所有配置都是根据您的需要设置的。详情请参阅 安装 kdump。
流程
在当前会话中停止
kdump服务：systemctl stop kdump.service
# systemctl stop kdump.serviceCopy to Clipboard Copied! Toggle word wrap Toggle overflow 禁用
kdump服务：systemctl disable kdump.service
# systemctl disable kdump.serviceCopy to Clipboard Copied! Toggle word wrap Toggle overflow
警告
建议您设置 kptr_restrict=1。在这种情况下，kdumpctl 服务会加载崩溃内核，无论正在启用或不启用内核地址空间(KASLR)。
故障排除步骤
当 kptr_restrict 没有设置为(1)时，如果启用了 KASLR，则 /proc/kcore 文件的内容生成为所有零。因此，kdumpctl 服务无法访问 /proc/kcore 并载入崩溃内核。
要临时解决这个问题，/usr/share/doc/kexec-tools/kexec-kdump-howto.txt 文件会显示警告信息，建议 kptr_restrict=1 设置。
要确保 kdumpctl 服务加载崩溃内核，请验证 sysctl.conf 文件中列出了 kernel.kptr_restrict = 1。
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