From: Cornelia Huck <cohuck@redhat.com>
To: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: qemu-devel <qemu-devel@nongnu.org>,
qemu-s390x <qemu-s390x@nongnu.org>,
Halil Pasic <pasic@linux.vnet.ibm.com>,
Alexander Graf <agraf@suse.de>, Thomas Huth <thuth@redhat.com>,
David Hildenbrand <david@redhat.com>,
Richard Henderson <rth@twiddle.net>
Subject: Re: [Qemu-devel] [PATCH v3 1/1] s390-ccw-virtio: allow for systems larger that 7.999TB
Date: Thu, 14 Dec 2017 14:21:38 +0100 [thread overview]
Message-ID: <20171214142138.3a5c9eef.cohuck@redhat.com> (raw)
In-Reply-To: <20171211122146.162430-1-borntraeger@de.ibm.com>
On Mon, 11 Dec 2017 13:21:46 +0100
Christian Borntraeger <borntraeger@de.ibm.com> wrote:
> KVM does not allow memory regions > KVM_MEM_MAX_NR_PAGES, basically
> limiting the memory per slot to 8TB-4k. As memory slots on s390/kvm must
> be a multiple of 1MB we need start a new memory region if we cross
> 8TB-1M.
>
> With that (and optimistic overcommitment in the kernel) I was able to
> start a 24TB guest on a 1TB system.
>
> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
> ---
> hw/s390x/s390-virtio-ccw.c | 28 +++++++++++++++++++++++++---
> 1 file changed, 25 insertions(+), 3 deletions(-)
Thanks, applied (with 1UL -> 1ULL).
next prev parent reply other threads:[~2017-12-14 13:21 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-11 12:21 [Qemu-devel] [PATCH v3 1/1] s390-ccw-virtio: allow for systems larger that 7.999TB Christian Borntraeger
2017-12-11 13:55 ` [Qemu-devel] [qemu-s390x] " David Hildenbrand
2017-12-11 14:04 ` Christian Borntraeger
2017-12-11 15:11 ` Cornelia Huck
2017-12-14 13:21 ` Cornelia Huck [this message]
2017-12-14 13:26 ` [Qemu-devel] " David Hildenbrand
2017-12-14 13:28 ` Cornelia Huck
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