Hi folks,
On 2025/7/31 19:14, Shameerali Kolothum Thodi via wrote:
-----Original Message-----
From: Jonathan Cameron <jonathan.came...@huawei.com>
Sent: Thursday, July 31, 2025 11:01 AM
To: Manos Pitsidianakis <manos.pitsidiana...@linaro.org>
Cc: qemu-devel@nongnu.org; Peter Maydell <peter.mayd...@linaro.org>;
qemu-...@nongnu.org; Gustavo Romero <gustavo.rom...@linaro.org>;
Shameerali Kolothum Thodi <shameerali.kolothum.th...@huawei.com>
Subject: Re: [PATCH] hw/arm: add static NVDIMMs in device tree
On Wed, 30 Jul 2025 15:21:41 +0300
Manos Pitsidianakis <manos.pitsidiana...@linaro.org> wrote:
NVDIMM is used for fast rootfs with EROFS, for example by kata
containers. To allow booting with static NVDIMM memory, add them to
the device tree in arm virt machine.
Just another question about the image passthrough via pmem,
I wonder if it's possible for QEMU to support one nvdimm,
virtio-pmem device with multiple memory backend files rather
than just one single file?
Because EROFS can use this way to support multi-layer images,
for example:
filesystem1: metadatafile + layerfile1 + layerfile2
filesystem2: metadatafile + layerfile1 + layerfile3
so that multiple pmem devices can share the same layer1 page
cache on the host.
More details also see:
https://erofs.docs.kernel.org/en/latest/merging.html
Many thanks!
Gao Xiang
