From: Paolo Bonzini <pbonzini@redhat.com>
To: Eduardo Habkost <ehabkost@redhat.com>
Cc: Laurent Vivier <lvivier@redhat.com>,
1896263@bugs.launchpad.net, kvm@vger.kernel.org,
Marcelo Tosatti <mtosatti@redhat.com>,
qemu-devel <qemu-devel@nongnu.org>,
"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Richard Henderson <rth@twiddle.net>
Subject: Re: [PATCH] i386: Don't try to set MSR_KVM_ASYNC_PF_EN if kernel-irqchip=off
Date: Tue, 22 Sep 2020 21:49:48 +0200 [thread overview]
Message-ID: <CABgObfasJBwoCAKaNPO0D=_USQv32rvBufU=occfOv09ch+odw@mail.gmail.com> (raw)
In-Reply-To: <20200922193903.GA2044576@habkost.net>
[-- Attachment #1: Type: text/plain, Size: 923 bytes --]
Il mar 22 set 2020, 21:39 Eduardo Habkost <ehabkost@redhat.com> ha scritto:
> On Tue, Sep 22, 2020 at 07:26:42PM +0200, Paolo Bonzini wrote:
> > On 22/09/20 19:22, Eduardo Habkost wrote:
> > > If it was possible, did KVM break live migration of
> > > kernel-irqchip=off guests that enabled APF? This would mean my
> > > patch is replacing a crash with a silent migration bug. Not nice
> > > either way.
> >
> > Let's drop kernel-irqchip=off completely so migration is not broken. :)
> >
> > I'm actually serious, I don't think we need a deprecation period even.
>
> I wasn't sure about this, but then I've noticed the man page says
> "disabling the in-kernel irqchip completely is not recommended
> except for debugging purposes."
>
> Does this note apply to all architectures?
>
At least on ARM, Raspberry Pi 4 cannot use kernel-irqchip=on at all. But
remember I am only talking about x86.
Paolo
> --
> Eduardo
>
>
[-- Attachment #2: Type: text/html, Size: 1621 bytes --]
next prev parent reply other threads:[~2020-09-22 19:50 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-18 17:08 [Bug 1896263] [NEW] The bios-tables-test test causes QEMU to crash (Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed) on AMD processors Apteryx
2020-09-21 11:31 ` Stefan Hajnoczi
2020-09-21 11:31 ` Stefan Hajnoczi
2020-09-21 13:50 ` [Bug 1896263] " Laurent Vivier
2020-09-22 9:05 ` Laurent Vivier
2020-09-22 14:07 ` Laurent Vivier
2020-09-22 15:14 ` [PATCH] i386: Don't try to set MSR_KVM_ASYNC_PF_EN if kernel-irqchip=off Eduardo Habkost
2020-09-22 15:14 ` [Bug 1896263] " Eduardo Habkost
2020-09-22 15:38 ` Vitaly Kuznetsov
2020-09-22 15:38 ` [Bug 1896263] " Vitaly Kuznetsov
2020-09-22 16:10 ` Eduardo Habkost
2020-09-22 16:10 ` [Bug 1896263] " Eduardo Habkost
2020-09-22 16:42 ` Vitaly Kuznetsov
2020-09-22 16:42 ` Vitaly Kuznetsov
2020-09-22 17:22 ` Eduardo Habkost
2020-09-22 17:22 ` [Bug 1896263] " Eduardo Habkost
2020-09-22 17:26 ` Paolo Bonzini
2020-09-22 19:39 ` Eduardo Habkost
2020-09-22 19:39 ` [Bug 1896263] " Eduardo Habkost
2020-09-22 19:49 ` Paolo Bonzini [this message]
2020-09-22 19:47 ` [PATCH] bios-tables-test: Remove kernel-irqchip=off option Eduardo Habkost
2020-09-22 19:47 ` [Bug 1896263] " Eduardo Habkost
2020-09-23 2:46 ` Paolo Bonzini
2020-11-08 9:51 ` [Bug 1896263] Re: The bios-tables-test test causes QEMU to crash (Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed) on AMD processors Thomas Huth
2020-12-10 8:43 ` Thomas Huth
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='CABgObfasJBwoCAKaNPO0D=_USQv32rvBufU=occfOv09ch+odw@mail.gmail.com' \
--to=pbonzini@redhat.com \
--cc=1896263@bugs.launchpad.net \
--cc=dgilbert@redhat.com \
--cc=ehabkost@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=lvivier@redhat.com \
--cc=mtosatti@redhat.com \
--cc=qemu-devel@nongnu.org \
--cc=rth@twiddle.net \
--cc=stefanha@redhat.com \
--cc=vkuznets@redhat.com \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).