From: Paolo Bonzini <pbonzini@redhat.com>
To: "Michael S. Tsirkin" <mst@redhat.com>,
Igor Mammedov <imammedo@redhat.com>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
netdev@vger.kernel.org
Subject: Re: [PATCH] vhost: support upto 509 memory regions
Date: Tue, 17 Feb 2015 11:59:48 +0100 [thread overview]
Message-ID: <54E31F24.1060705@redhat.com> (raw)
In-Reply-To: <20150217090242.GA20254@redhat.com>
On 17/02/2015 10:02, Michael S. Tsirkin wrote:
> > Increasing VHOST_MEMORY_MAX_NREGIONS from 65 to 509
> > to match KVM_USER_MEM_SLOTS fixes issue for vhost-net.
> >
> > Signed-off-by: Igor Mammedov <imammedo@redhat.com>
>
> This scares me a bit: each region is 32byte, we are talking
> a 16K allocation that userspace can trigger.
What's bad with a 16K allocation?
> How does kvm handle this issue?
It doesn't.
Paolo
next prev parent reply other threads:[~2015-02-17 10:59 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-13 15:49 [PATCH] vhost: support upto 509 memory regions Igor Mammedov
2015-02-17 9:02 ` Michael S. Tsirkin
2015-02-17 10:59 ` Paolo Bonzini [this message]
2015-02-17 12:32 ` Michael S. Tsirkin
2015-02-17 13:11 ` Paolo Bonzini
2015-02-17 13:29 ` Michael S. Tsirkin
2015-02-17 14:11 ` Paolo Bonzini
2015-02-17 15:02 ` Igor Mammedov
2015-02-17 17:09 ` Paolo Bonzini
2015-02-17 14:44 ` Igor Mammedov
2015-02-17 14:45 ` Paolo Bonzini
2015-02-18 0:53 ` Eric Northup
2015-02-18 4:27 ` Michael S. Tsirkin
2015-05-18 16:22 ` Andrey Korolyov
2015-05-18 16:28 ` Michael S. Tsirkin
2015-05-19 11:50 ` Igor Mammedov
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