From: Joerg Roedel <jroedel@suse.de>
To: speck@linutronix.de
Subject: [MODERATED] Re: ***UNCHECKED*** Re: L1D-Fault KVM mitigation
Date: Tue, 24 Apr 2018 12:30:37 +0200 [thread overview]
Message-ID: <20180424103037.2lwafyzyoxbinapv@suse.de> (raw)
In-Reply-To: <20180424093537.GC4064@hirez.programming.kicks-ass.net>
On Tue, Apr 24, 2018 at 11:35:37AM +0200, speck for Peter Zijlstra wrote:
> Another option, that is being explored, is to co-schedule siblings.
> So ensure all siblings either run vcpus of the _same_ VM or idle.
>
> Of course, this is all rather intrusive and ugly and brings with it
> setup costs as well, because you'd have to sync up on VMENTER, VMEXIT
> and interrupts (on the idle CPUs).
Not to mention that it is going to be a maintenance nightmare for the
years to come.
And even if we end up with gang-scheduling in the end, which I don't see
coming yet, we need a simpler plan to have a mitigation when the embargo
lifts.
Regards,
Joerg
next prev parent reply other threads:[~2018-04-24 10:30 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-24 9:06 [MODERATED] L1D-Fault KVM mitigation Joerg Roedel
2018-04-24 9:35 ` [MODERATED] " Peter Zijlstra
2018-04-24 9:48 ` David Woodhouse
2018-04-24 11:04 ` Peter Zijlstra
2018-04-24 11:16 ` David Woodhouse
2018-04-24 15:10 ` Jon Masters
2018-05-23 9:45 ` David Woodhouse
2018-05-24 9:45 ` Peter Zijlstra
2018-05-24 14:14 ` Jon Masters
2018-05-24 15:04 ` Thomas Gleixner
2018-05-24 15:33 ` Thomas Gleixner
2018-05-24 15:38 ` [MODERATED] " Jiri Kosina
2018-05-24 17:22 ` Dave Hansen
2018-05-24 17:30 ` Linus Torvalds
2018-05-24 23:18 ` [MODERATED] Encrypted Message Tim Chen
2018-05-24 23:28 ` [MODERATED] Re: L1D-Fault KVM mitigation Linus Torvalds
2018-05-25 8:31 ` Thomas Gleixner
2018-05-28 14:43 ` [MODERATED] " Paolo Bonzini
2018-05-25 18:22 ` [MODERATED] Encrypted Message Tim Chen
2018-05-26 19:14 ` L1D-Fault KVM mitigation Thomas Gleixner
2018-05-26 20:43 ` [MODERATED] " Andi Kleen
2018-05-26 20:48 ` Linus Torvalds
2018-05-27 18:25 ` Andi Kleen
2018-05-27 18:49 ` Linus Torvalds
2018-05-27 18:57 ` Thomas Gleixner
2018-05-27 19:13 ` [MODERATED] " Andrew Cooper
2018-05-27 19:26 ` Linus Torvalds
2018-05-27 19:41 ` Thomas Gleixner
2018-05-27 22:26 ` [MODERATED] " Andrew Cooper
2018-05-28 6:47 ` Thomas Gleixner
2018-05-28 12:26 ` [MODERATED] " Andrew Cooper
2018-05-28 14:40 ` Paolo Bonzini
2018-05-28 15:56 ` Thomas Gleixner
2018-05-28 17:15 ` [MODERATED] " Paolo Bonzini
2018-05-27 15:42 ` Thomas Gleixner
2018-05-27 16:26 ` [MODERATED] " Linus Torvalds
2018-05-27 18:31 ` Andi Kleen
2018-05-29 19:29 ` [MODERATED] Encrypted Message Tim Chen
2018-05-29 21:14 ` L1D-Fault KVM mitigation Thomas Gleixner
2018-05-30 16:38 ` [MODERATED] Encrypted Message Tim Chen
2018-05-24 15:44 ` [MODERATED] Re: L1D-Fault KVM mitigation Andi Kleen
2018-05-24 15:38 ` Linus Torvalds
2018-05-24 15:59 ` David Woodhouse
2018-05-24 16:35 ` Linus Torvalds
2018-05-24 16:51 ` David Woodhouse
2018-05-24 16:57 ` Linus Torvalds
2018-05-25 11:29 ` David Woodhouse
2018-04-24 10:30 ` Joerg Roedel [this message]
2018-04-24 11:09 ` Thomas Gleixner
2018-04-24 16:06 ` [MODERATED] " Andi Kleen
2018-04-24 12:53 ` Paolo Bonzini
2018-05-03 16:20 ` Konrad Rzeszutek Wilk
2018-05-07 17:11 ` Paolo Bonzini
2018-05-16 8:51 ` Jiri Kosina
2018-05-16 8:53 ` Paolo Bonzini
2018-05-21 10:06 ` David Woodhouse
2018-05-21 13:40 ` Thomas Gleixner
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