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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 7 Nov 2017
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      🔥🔥🔥memtest86+🔥🔥🔥pic.twitter.com/AlCP8NDCaK

      7 replies 71 retweets 199 likes
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    2. Hector Martin‏ @marcan42 7 Nov 2017
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      Conclusion: my laptop's RAM is 99.9999999985% good at 100°C, 99.9999999996% good at normal operating temperature.

      3 replies 8 retweets 35 likes
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    3. Hector Martin‏ @marcan42 7 Nov 2017
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      Now I can just mask that one bad bit and those three slightly dodgy bits in my GRUB config and carry on.

      3 replies 5 retweets 27 likes
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    4. Michail‏ @MichailG 7 Nov 2017
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      Replying to @marcan42

      Can you mask individual bits in modern ram? Isn’t the minimum fetch size 1 byte? (row/column addressing lands on 8 bits)

      1 reply 0 retweets 1 like
      Hector Martin‏ @marcan42 7 Nov 2017
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      Replying to @MichailG

      The granularity is one page (4KiB). But I'm actually killing three 1MiB blocks around the bad bits, which makes it DIMM-slot-independent.

      11:00 AM - 7 Nov 2017
      • 6 Likes
      • purkkaviritys Tim Rühsen Jim Gray Manish ∀lan ∃liasen Michail
      1 reply 0 retweets 6 likes
        1. Hector Martin‏ @marcan42 7 Nov 2017
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          Replying to @marcan42 @MichailG

          Since the RAM is interleaved, no matter which slot a given stick is in, the bad address starts with the same high order bits.

          0 replies 0 retweets 4 likes
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