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wycats's profile
Yehuda Katz 🥨
Yehuda Katz 🥨
Yehuda Katz  🥨
Verified account
@wycats

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Yehuda Katz  🥨Verified account

@wycats

Tilde Co-Founder, OSS enthusiast and world traveler.

Portland, OR
yehudakatz.com
Joined August 2007

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    Yehuda Katz  🥨‏Verified account @wycats Jan 12

    Is anyone else seeing this? We saw latencies double for our busy HTTP endpoint last week but now it looks like it's back to normal. Is Amazon improving their mitigation? Or something else I might have missed?pic.twitter.com/CxMh4wVjyt

    2:24 PM - 12 Jan 2018
    • 46 Retweets
    • 60 Likes
    • Tiago Padrela Amaro chetan Tatsuhiko Miyagawa Gabriel Ricard Robert DeLuca Mathieu Fosse 🎙 Reza Ustaman Sangat Diego Bernardes
    6 replies 46 retweets 60 likes
      1. New conversation
      2. Vincent Janelle‏ @randomfrequency Jan 14
        Replying to @wycats @royfein

        there's a mitigation with compilers called "retpoline", but requires recompiling the whole OS + everything running on it...

        1 reply 0 retweets 0 likes
      3. Yehuda Katz  🥨‏Verified account @wycats Jan 14
        Replying to @randomfrequency @royfein

        Since I use my own ami and didn't recycle the system with a new OS, seems like it can't be that

        1 reply 0 retweets 0 likes
      4. Vincent Janelle‏ @randomfrequency Jan 14
        Replying to @wycats @royfein

        You're running linux on top of their VM system, which is running an OS... At some point it rebooted.

        1 reply 0 retweets 0 likes
      5. Yehuda Katz  🥨‏Verified account @wycats Jan 14
        Replying to @randomfrequency @royfein

        It may have rebooted but it seems unlikely/impossible that they recompiled the OS and replaced the AMI out from under me.

        1 reply 0 retweets 0 likes
      6. Vincent Janelle‏ @randomfrequency Jan 14
        Replying to @wycats @royfein

        That's because they didn't. The mitigation for meltdown is many turtles deep.

        1 reply 0 retweets 0 likes
      7. Yehuda Katz  🥨‏Verified account @wycats Jan 14
        Replying to @randomfrequency @royfein

        Yehuda Katz  🥨 Retweeted Vincent Janelle

        Ah I was just referring to https://twitter.com/randomfrequency/status/952672323043143680 … which said they had to recompile the OS.

        Yehuda Katz  🥨 added,

        Vincent Janelle @randomfrequency
        Replying to @wycats @royfein
        there's a mitigation with compilers called "retpoline", but requires recompiling the whole OS + everything running on it...
        1 reply 0 retweets 0 likes
      8. Vincent Janelle‏ @randomfrequency Jan 14
        Replying to @wycats @royfein

        The node you're running on runs linux, plus a hypervisor, which you run linux on. They'd have to mitigate meltdown to protect your instance from other instances, in other words.

        0 replies 0 retweets 1 like
      9. End of conversation
      1. pedro belo‏ @ped Jan 12
        Replying to @wycats

        pedro belo Retweeted

        apparently so! https://twitter.com/chanian/status/951891326366175232 …

        pedro belo added,

        This Tweet is unavailable.
        0 replies 1 retweet 5 likes
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      1. 𝕺𝖓𝖞𝖝𝕽𝖆𝖛𝖊𝖓‏ @onyxraven Jan 12
        Replying to @wycats

        we're seeing the same - gunna let it bake a couple days but pretty impressive

        0 replies 0 retweets 2 likes
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      1. Pierre Baillet‏ @octplane Jan 12
        Replying to @wycats

        Yes, we have seen the same…

        0 replies 0 retweets 1 like
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      1. Robin Berjon‏ @robinberjon Jan 12
        Replying to @wycats

        They’ve been rebooting a lot of their capacity, I wonder if that may have had an impact.

        0 replies 0 retweets 1 like
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      1. Chris Herbert‏ @B2Bspecialist Jan 13
        Replying to @wycats

        @brettg98 may have some insights.

        0 replies 0 retweets 0 likes
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