All of lore.kernel.org
 help / color / mirror / Atom feed
From: bugzilla-daemon@kernel.org
To: kvm@vger.kernel.org
Subject: [Bug 217796] latest Zen Inception fixes breaks nested kvm virtualization on AMD
Date: Sat, 19 Aug 2023 10:39:37 +0000	[thread overview]
Message-ID: <bug-217796-28872-GcvVFBYPGE@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-217796-28872@https.bugzilla.kernel.org/>

https://bugzilla.kernel.org/show_bug.cgi?id=217796

--- Comment #3 from sonst+kernel@o-oberst.de ---
Sean,

it does sound ridiculous, but it isn't. I tested the fix you suggested and it
works now with that patch applied. In the meantime i switched to a differnet
machine to be able to test your fix and there I could also confirm the problem
there on a 6.4.11 kernel: 

Test machine setup: 

Gentoo, (vanilla) Kernel 6.4.11

Without the patch and spec_rstack_overflow in the default meaning
pec_rstack_overflow=safe-ret also on this system my nested VMs do not start and
get OOM-killed.

I then applied the patch from your link, Sean, and it works now.

Cheers,

Oliver

-- 
You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.

      parent reply	other threads:[~2023-08-19 10:44 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-08-15 14:55 [Bug 217796] New: latest Zen Inception fixes breaks nested kvm virtualization on AMD bugzilla-daemon
2023-08-15 17:53 ` [Bug 217796] " bugzilla-daemon
2023-08-15 20:30 ` bugzilla-daemon
2023-08-19 10:39 ` bugzilla-daemon [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=bug-217796-28872-GcvVFBYPGE@https.bugzilla.kernel.org/ \
    --to=bugzilla-daemon@kernel.org \
    --cc=kvm@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.