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[Qemu-devel] [PATCH 0/2] add "nopin" option in the memory-backend-file
From: |
Yang Zhong |
Subject: |
[Qemu-devel] [PATCH 0/2] add "nopin" option in the memory-backend-file |
Date: |
Mon, 16 Oct 2017 16:56:21 +0800 |
Qemu does not need pin NVDIMM memory for VFIO device during VFIO
hotplug, what's more, if there is no NVDIMM hw in the test machine,
the VFIO hotplug operation will need at least 10 minutes to pin RAM
as the NVDIMM, this time is not accepted. So we add "nopin=on" option
in the memory-backed-file, which can avoid to pin RAM memory for NVDIMM.
The new command like below:
-object
memory-backend-file,id=mem0,share,nopin=on,mem-path=kvm.img,size=9161408512
The default of "nopin" still "off" value, which is same with previous value.
Yang Zhong (2):
hostmem-file: Add "nopin" option for memory-backend-file
nvdimm: Add "nopin" for related documents
backends/hostmem-file.c | 23 +++++++++++++++++++++++
docs/nvdimm.txt | 10 ++++++++--
hw/vfio/common.c | 12 +++++++++++-
qemu-options.hx | 6 +++++-
4 files changed, 47 insertions(+), 4 deletions(-)
--
1.9.1
Re: [Qemu-devel] [PATCH 0/2] add "nopin" option in the memory-backend-file, Alex Williamson, 2017/10/16