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Re: [Qemu-devel] [PATCH V6 3/7] hostmem-file: add the 'pmem' option


From: Stefan Hajnoczi
Subject: Re: [Qemu-devel] [PATCH V6 3/7] hostmem-file: add the 'pmem' option
Date: Tue, 5 Jun 2018 12:44:18 +0100
User-agent: Mutt/1.9.5 (2018-04-13)

On Fri, Jun 01, 2018 at 04:10:25PM +0800, address@hidden wrote:
> From: Junyan He <address@hidden>
> 
> When QEMU emulates vNVDIMM labels and migrates vNVDIMM devices, it
> needs to know whether the backend storage is a real persistent memory,
> in order to decide whether special operations should be performed to
> ensure the data persistence.
> 
> This boolean option 'pmem' allows users to specify whether the backend
> storage of memory-backend-file is a real persistent memory. If
> 'pmem=on', QEMU will set the flag RAM_PMEM in the RAM block of the
> corresponding memory region.
> 
> Signed-off-by: Junyan He <address@hidden>
> Signed-off-by: Haozhong Zhang <address@hidden>
> ---
>  backends/hostmem-file.c | 27 ++++++++++++++++++++++++++-
>  docs/nvdimm.txt         | 14 ++++++++++++++
>  exec.c                  |  9 +++++++++
>  include/exec/memory.h   |  6 ++++++
>  include/exec/ram_addr.h |  3 +++
>  qemu-options.hx         |  7 +++++++
>  6 files changed, 65 insertions(+), 1 deletion(-)

Reviewed-by: Stefan Hajnoczi <address@hidden>

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