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From: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <80415da5-4eef-bf85-b617-fadc3dae4475@redhat.com>
Date: Mon, 6 Nov 2017 10:41:56 +0100
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Subject: Re: [Qemu-devel] qemu core file size
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To: Wanpeng Li <kernellwp@gmail.com>, Alexey Kardashevskiy <aik@ozlabs.ru>, Fam Zheng <famz@redhat.com>
Cc: "qemu-devel@nongnu.org Developers" <qemu-devel@nongnu.org>

On 06/11/2017 10:11, Wanpeng Li wrote:
> Hi all,
> 
> qemu core dump, max_core="unlimited", dump_guest_core=0, kill -11 pid
> to generate a qemu core file, the Rss of qemu itself is ~40MB, the
> core file is almost ~40MB in centos 6.x, but ~400MB in cents 7.x, any
> idea?

My suspicion is the memory API, which isn't used in CentOS 6.x.  QEMU
2.11 should fix that.

Paolo