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Re: [LUG] github meltdown + spectre patch status
- To: "list@xxxxxxxxxxxxx" <list@xxxxxxxxxxxxx>
- Subject: Re: [LUG] github meltdown + spectre patch status
- From: mr meowski <mr.meowski@xxxxxxxx>
- Date: Thu, 18 Jan 2018 17:58:23 +0000
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- Thread-topic: [LUG] github meltdown + spectre patch status
More from the frontline (it's been a rough couple of weeks)...
Ubuntu tentatively pushes mitigation for Spectre variants 1 & 2 to proposed:
https://insights.ubuntu.com/2018/01/17/spectre-mitigation-updates-available-for-testing-in-ubuntu-proposed/
3rd party commentary with better information about what this means:
https://www.phoronix.com/scan.php?page=news_item&px=Ubuntu-Preps-Spectre-Kernels
Kernel guru on the current state of the art:
http://webcache.googleusercontent.com/search?q=cache:RXhIOHHfcxMJ:http://kroah.com/log/blog/2018/01/06/meltdown-status/%2Blinux+kernel+compile+spectre+meltdown
More grim news from a different kernel guru:
https://lwn.net/Articles/743265/
Real world performance hit statistics are filtering in now and the
results aren't pretty - forget what Intel PR are saying, you're going to
see drops for sure. The older your model of CPU, the worse it's going to
be. There's a lot of complex interplay between IBRS/IBPB and the more
performant "reptoline" Spectre fixes but unless you're willing to patch
your GCC version manually for -mindirect-branch=thunk and compile your
own bleeding edge kernel you won't be getting these fixes for a while yet.
Oh well, at least it can't get any worse right?
https://solaceattack.com/
https://react-etc.net/entry/skyfall-and-solace-vulnerabilities
Arghhh!
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