linux-kernel - Re: [PATCH] KVM: x86: switch hugepage recovery thread to vhost

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <hbv5uf7b2auiwyjkekmtfpu26ht7ulvapnszx7rdgwoowqdcna@pwuuodkenwgr>
Date: Mon, 25 Nov 2024 10:01:01 +0100
From: Michal Koutný <mkoutny@...e.com>
To: Paolo Bonzini <pbonzini@...hat.com>
Cc: linux-kernel@...r.kernel.org, kvm@...r.kernel.org, 
	michael.christie@...cle.com, Tejun Heo <tj@...nel.org>, Luca Boccassi <bluca@...ian.org>
Subject: Re: [PATCH] KVM: x86: switch hugepage recovery thread to vhost_task

On Mon, Nov 18, 2024 at 01:42:27PM GMT, Paolo Bonzini <pbonzini@...hat.com> wrote:
> I mean being able to send it to the threads with an effect.

Understood now.

> > Consequently, it's OK if a (possibly unprivileged) user stops this
> > thread forever (they only harm themselves, not the rest of the system),
> > correct?
> 
> Yes, they will run with fewer huge pages and worse TLB performance.

Alright.

Thanks,
Michal

> > It is nice indeed.
> > I think the bugs we saw are not so serious to warrant
> > Fixes: c57c80467f90e ("kvm: Add helper function for creating VM worker threads")

I'm mainly posting this because there are some people surprised this
didn't get to 6.12. Hence I wonder if Cc: stable would be helpful here.


Download attachment "signature.asc" of type "application/pgp-signature" (229 bytes)