From: "Radim Krčmář" <rkrcmar@redhat.com>
To: "Li, Zhen-Hua" <zhen-hual@hp.com>
Cc: Gleb Natapov <gleb@kernel.org>,
Paolo Bonzini <pbonzini@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/1] kvm: increase max vcpu count
Date: Thu, 15 May 2014 12:18:12 +0200 [thread overview]
Message-ID: <20140515101811.GA16070@potion.brq.redhat.com> (raw)
In-Reply-To: <1400147417-22269-1-git-send-email-zhen-hual@hp.com>
2014-05-15 17:50+0800, Li, Zhen-Hua:
> This patch is trying to increase the maximum supported vcpu number.
>
> There has been big system supporting more than 256 logical CPUs, and vmware
> can also support guest system with more than logical 256 CPUs. So kvm should
> also increase the maximum supported cpu number.
How did it work?
KVM lapic does not handle more more than 256 [1] at the moment, so
additional VCPUs had to wraparound ...
---
1: "struct kvm_apic_map" has "struct kvm_lapic *phys_map[256]" and we
are using "& 0xff" when dealing with it, too.
prev parent reply other threads:[~2014-05-15 10:18 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-15 9:50 Li, Zhen-Hua
2014-05-15 10:18 ` Radim Krčmář [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=20140515101811.GA16070@potion.brq.redhat.com \
--to=rkrcmar@redhat.com \
--cc=gleb@kernel.org \
--cc=hpa@zytor.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=pbonzini@redhat.com \
--cc=tglx@linutronix.de \
--cc=x86@kernel.org \
--cc=zhen-hual@hp.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
Powered by JetHome