Messages in this thread | | | Subject | Re: [PATCH 0/15] x86/split_lock: Enable #AC exception for split locked accesses | From | Dave Hansen <> | Date | Tue, 15 May 2018 09:30:51 -0700 |
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On 05/15/2018 09:26 AM, Alan Cox wrote: >> Could you describe the performance degradation? Why is this not a >> "doctor it hurts when I do that" situation? > They already know it hurts - the question is why and where.
I thought there were also cross-VM and cross-process concerns where somebody unprivileged can make the whole system slow down. They might even be malicious, so this isn't something that *just* hurts one app or one VM.
I think that's what I wanted to see hit the changelog.
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