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1. zunda ? nはおまけ :green_dango: (zundan@mastodon.zunda.ninja@mastodon.zunda.ninja)'s status on Tuesday, 25-Sep-2018 03:56:38 JST zunda ? nはおまけ :green_dango:

   4.15.0-34だとinitramfsの解凍に10分以上かかってたことが判明。うむむー。

   [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.15.0-34-generic root=UUID=a6268849-42cb-4d0e-80f3-eb2704407c01 ro vga=normal
   :
   [ 1.565894] Unpacking initramfs...
   [ 360.051261] perf: interrupt took too long (2536 > 2500), lowering kernel.perf_event_max_sample_rate to 78750
   [ 480.021383] perf: interrupt took too long (3222 > 3170), lowering kernel.perf_event_max_sample_rate to 62000
   [ 616.739081] Freeing initrd memory: 55196K

   • 俳句検出bot (find575@theboss.tech)'s status on Tuesday, 25-Sep-2018 03:57:27 JST 俳句検出bot

     in reply to

     @zundan 俳句を発見致しました！
     『解凍に10分以上かかってた』

     zunda ? nはおまけ :green_dango: repeated this.
   • zunda ? nはおまけ :green_dango: (zundan@mastodon.zunda.ninja@mastodon.zunda.ninja)'s status on Tuesday, 25-Sep-2018 11:20:32 JST zunda ? nはおまけ :green_dango:

     in reply to

     $ ls -l /boot/initrd.img-4.*
     -rw-r--r-- 1 root root 56517463 Sep 23 15:58 /boot/initrd.img-4.15.0-34-generic
     -rw-r--r-- 1 root root 44532540 Sep 23 15:55 /boot/initrd.img-4.4.0-135-generic
     $ file /boot/initrd.img-4.*
     /boot/initrd.img-4.15.0-34-generic: ASCII cpio archive (SVR4 with no CRC)
     /boot/initrd.img-4.4.0-135-generic: ASCII cpio archive (SVR4 with no CRC)

     そんなにおっきくないしなあ

   • zunda ? nはおまけ :green_dango: (zundan@mastodon.zunda.ninja@mastodon.zunda.ninja)'s status on Monday, 08-Oct-2018 04:55:44 JST zunda ? nはおまけ :green_dango:

     in reply to

     4.4上で解凍してみると一瞬

     $ uname -srm
     Linux 4.4.0-135-generic x86_64
     $ time cpio -id < /boot/initrd.img-4.15.0-34-generic
     56 blocks

     real 0m0.014s
     user 0m0.004s
     sys 0m0.008s

     もちろん4.4のinitrdも。

     $ time cpio -id < /boot/initrd.img-4.4.0-135-generic
     56 blocks

     real 0m0.025s
     user 0m0.000s
     sys 0m0.016s

   • zunda ? nはおまけ :green_dango: (zundan@mastodon.zunda.ninja@mastodon.zunda.ninja)'s status on Monday, 08-Oct-2018 05:51:52 JST zunda ? nはおまけ :green_dango:

     in reply to

     4.15.0-34に起動してみた。cpioでの解凍は一瞬。やっぱり起動時のみの問題だね。

     $ uname -srm
     Linux 4.15.0-34-generic x86_64
     $ dmesg | grep -A1 initramfs
     [ 1.529762] Unpacking initramfs...
     [ 360.052064] perf: interrupt took too long (2507 > 2500), lowering kernel.perf_event_max_sample_rate to 79750
     $ time cpio -id < /boot/initrd.img-4.4.0-135-generic
     56 blocks

     real 0m0.053s
     user 0m0.021s
     sys 0m0.016s
     $time cpio -id < /boot/initrd.img-4.15.0-34-generic
     56 blocks

     real 0m0.054s
     user 0m0.022s
     sys 0m0.014s

   • zunda ? nはおまけ :green_dango: (zundan@mastodon.zunda.ninja@mastodon.zunda.ninja)'s status on Monday, 08-Oct-2018 06:16:52 JST zunda ? nはおまけ :green_dango:

     in reply to

     4.15.0-36が来てたので起動してみたんだけどやっぱり遅い。

     $ uname -srm
     Linux 4.15.0-36-generic x86_64
     $ dmesg | grep -A1 initramfs
     [ 1.675430] Unpacking initramfs...
     [ 350.053271] perf: interrupt took too long (2513 > 2500), lowering kernel.perf_event_max_sample_rate to 79500

   • zunda ? nはおまけ :green_dango: (zundan@mastodon.zunda.ninja@mastodon.zunda.ninja)'s status on Sunday, 14-Oct-2018 10:53:35 JST zunda ? nはおまけ :green_dango:

     in reply to

     次は acpi=off してみよう(今は日本のラジオを聴いてるのであとで)

     https://www.linuxquestions.org/questions/linux-laptop-and-netbook-25/kernel-booting-slow-initramfs-ubuntu-7-04-a-572002/#post2836644