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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. Hector Martin‏ @marcan42 8 Nov 2017
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      Linux kernels sure build faster with all drivers disabled. I'm at about 100 seconds on my laptop.

      2 replies 0 retweets 14 likes
    2. Nolan  🚀 👉 ❤ :/  ⛄!‏ @sneakin 8 Nov 2017
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      Replying to @marcan42

      And it boots? All hardware works? Even random new USB toy?

      1 reply 0 retweets 0 likes
    3. NewtonRev‏ @NewtonRev 8 Nov 2017
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      Replying to @sneakin @marcan42

      He probably disabled USB support too. But with some Serial Driver(8250/1655), you can boot it/use it on Qemu :p

      1 reply 0 retweets 0 likes
    4. Hector Martin‏ @marcan42 8 Nov 2017
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      Replying to @NewtonRev @sneakin

      Yeah, it has serial support and that's pretty much it. No storage/block devices. Initramfs only. ACPI only because I need SMP. It's for Qemu.

      1 reply 0 retweets 0 likes
    5. Nolan  🚀 👉 ❤ :/  ⛄!‏ @sneakin 8 Nov 2017
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      Replying to @marcan42 @NewtonRev

      Then you need virtio drivers.

      1 reply 0 retweets 0 likes
    6. Hector Martin‏ @marcan42 8 Nov 2017
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      Replying to @sneakin @NewtonRev

      No virtio drivers either. I literally have a serial port and that's it. I even disabled the PCI bus entirely. My kernel boot-time dmesg is barely longer than one screenful.

      1 reply 0 retweets 0 likes
    7. Nolan  🚀 👉 ❤ :/  ⛄!‏ @sneakin 8 Nov 2017
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      Replying to @marcan42 @NewtonRev

      Guess I need to try. Bet it boots fast.

      1 reply 0 retweets 0 likes
    8. Hector Martin‏ @marcan42 8 Nov 2017
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      Replying to @sneakin @NewtonRev

      About one second from launching Qemu to my userspace app running.

      1 reply 0 retweets 1 like
    9. Nolan  🚀 👉 ❤ :/  ⛄!‏ @sneakin 8 Nov 2017
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      Replying to @marcan42 @NewtonRev

      Is the kernel compressed?

      1 reply 0 retweets 0 likes
      Hector Martin‏ @marcan42 8 Nov 2017
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      Replying to @sneakin @NewtonRev

      Yes. I got the bzImage down to 1.4MB with gzip compression.

      10:47 AM - 8 Nov 2017
      1 reply 0 retweets 0 likes
        1. New conversation
        1. Nolan  🚀 👉 ❤ :/  ⛄!‏ @sneakin 8 Nov 2017
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          Replying to @marcan42 @NewtonRev

          I was thinking it would be faster without.

          1 reply 0 retweets 0 likes
        2. Hector Martin‏ @marcan42 8 Nov 2017
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          Replying to @sneakin @NewtonRev

          The time to the first kernel messages is barely 0.2s or less. It actually spends half a second or so bringing up the CPUs. With a single CPU it takes about 0.3s total from launching qemu to userspace, give or take.

          0 replies 0 retweets 0 likes
          3. End of conversation

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