Dmesg: Revision history

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20 April 2024

27 February 2024

20 January 2024

9 January 2024

  • curprev 23:0023:00, 9 January 2024Helpful talk contribs 881 bytes +881 Created page with "<!-- dmesg is a fixed-size ringbuffer in linux kernel memory. printk() writes to dmesg Boot code writes a bunch to it. Later writes come from things like segfaults, oom-killer, device changes, Ringbuffer means that once full, it rewrites old lines. That fixed '''size''' is usually on the order of dozens to hundreds of kilobytes. If grep CONFIG_LOG_BUF_SHIFT /boot/config-`uname -r` says something like CONFIG_LOG_BUF_SHIFT=18 that means 256KiB (1<<18)..."