From: Avi Kivity <avi@redhat.com>
To: Takuya Yoshikawa <takuya.yoshikawa@gmail.com>
Cc: mtosatti@redhat.com, kvm@vger.kernel.org, yoshikawa.takuya@oss.ntt.co.jp
Subject: Re: [PATCH 2/2 v2] KVM: Avoid wasting pages for small lpage_info arrays
Date: Sun, 20 May 2012 17:08:45 +0300 [thread overview]
Message-ID: <4FB8FAED.20309@redhat.com> (raw)
In-Reply-To: <20120520131507.e4e14532f99266deb311e6a3@gmail.com>
On 05/20/2012 07:15 AM, Takuya Yoshikawa wrote:
> From: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
>
> lpage_info is created for each large level even when the memory slot is
> not for RAM. This means that when we add one slot for a PCI device, we
> end up allocating at least KVM_NR_PAGE_SIZES - 1 pages by vmalloc().
>
> To make things worse, there is an increasing number of devices which
> would result in more pages being wasted this way.
>
> This patch mitigates this problem by using kvm_kvzalloc().
>
Thanks, applied to 'queue'.
--
error compiling committee.c: too many arguments to function
prev parent reply other threads:[~2012-05-20 14:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-20 4:13 [PATCH 1/2] KVM: Separate out dirty_bitmap allocation code as kvm_kvzalloc() Takuya Yoshikawa
2012-05-20 4:15 ` [PATCH 2/2 v2] KVM: Avoid wasting pages for small lpage_info arrays Takuya Yoshikawa
2012-05-20 14:08 ` Avi Kivity [this message]
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