So I looked at the at patches posted on the Linux Kernel mailing list, and their “quick solution” was to convert everything to thunks. Which effectively discards any benefit offered by the kernel page table cache (which is the cause of this problem). They have plans to improve those patches and reduce the performance hit. Microsoft probably had a better solution. I’m sure people are out there reverse-engineering their little fingers off to figure it out.
From: Michael B. Smith Sent: Thursday, January 4, 2018 10:01 AM To: ntsysadm@lists.myitforum.com Subject: RE: [NTSysADM] New blog post: Windows Speculative Execution Client/Server Patches/Mitigations/Detection Summary None. Microsoft says it’s “minimal but dependent on customer workload”. This is confirmed by what I’ve seen posted on twitter so far. A couple of percentage points. Linux is seeing a minimum of 5% performance reduction and as high as 23% (so far). It may, for once, finally be true to say: Windows is faster than Linux. ☺ (Paul Thurrott is gloating about this on twitter.) From: listsad...@lists.myitforum.com<mailto:listsad...@lists.myitforum.com> [mailto:listsad...@lists.myitforum.com] On Behalf Of Joseph L. Casale Sent: Thursday, January 4, 2018 9:54 AM To: ntsysadm@lists.myitforum.com<mailto:ntsysadm@lists.myitforum.com> Subject: RE: [NTSysADM] New blog post: Windows Speculative Execution Client/Server Patches/Mitigations/Detection Summary Which article quantifies the performance degradation? From: listsad...@lists.myitforum.com<mailto:listsad...@lists.myitforum.com> [mailto:listsad...@lists.myitforum.com] On Behalf Of Ed Ziots Sent: Thursday, January 4, 2018 9:34 AM To: ntsysadm@lists.myitforum.com<mailto:ntsysadm@lists.myitforum.com> Subject: Re: [NTSysADM] New blog post: Windows Speculative Execution Client/Server Patches/Mitigations/Detection Summary Yeah this one is going to be a nasty one but looks like cloud service providers are patching for it now. But saw there might be a 30 percebt performance hit with windows.. is pretty ugly.. Nice job intel.. way to mess it up again. Ed On Jan 4, 2018 8:54 AM, "Michael B. Smith" <mich...@smithcons.com<mailto:mich...@smithcons.com>> wrote: New blog post: #Windows Speculative Execution Client/Server Patches/Mitigations/Detection Summary http://www.essential.exchange/2018/01/04/windows-speculative-execution-client-server-patches-mitigations-detection-summary/ Not intended to be comprehensive, but as of the morning of 4-January, all the worthwhile information I can find published by Microsoft on the Speculative Execution issue…
