OpenBMC on eMMC NAND

OpenBMC on eMMC NAND

[Adriana Kobylak]

Hi all,

Joel and I have been working on getting OpenBMC to run on an eMMC NAND.
For the kernel, there'll be some patches coming to support it.
For the rootfs, the proposal is to have an ext4 filesystem, and use lvm 
for volume management, which allows for dynamic partitioning.
For proof of concept, we're starting to build an ext4 BMC image for 
IBM's system Swift[1]. Up next is creating an initramfs that supports 
lvm, and update the code update apps to handle ext4 images and lvm 
volumes. Thinking of creating an 'lvm' or 'ext4' distro feature like the 
'ubi' one to enable this new support during build time.
Let us know if there are any opinions, questions, or interest. Look for 
updates on the mailing list as we continue to make progress.


[1] https://gerrit.openbmc-project.xyz/c/openbmc/meta-ibm/+/22436

Re: OpenBMC on eMMC NAND

[Adriana Kobylak]

On 2019-06-17 11:26, Adriana Kobylak wrote:
> Hi all,
> 
> Joel and I have been working on getting OpenBMC to run on an eMMC NAND.
> For the kernel, there'll be some patches coming to support it.
> For the rootfs, the proposal is to have an ext4 filesystem, and use
> lvm for volume management, which allows for dynamic partitioning.

I'll be filling up a design doc to document this proposal. Also we don't
have documentation for the currently supported filesystems, so I'll be
pushing up new docs based on Milton's writeup[2] to document the 
existing
implementations. The initial commit to propose a subdir to hold these
upcoming docs is in gerrit for review[3].

> For proof of concept, we're starting to build an ext4 BMC image for
> IBM's system Swift[1]. Up next is creating an initramfs that supports
> lvm, and update the code update apps to handle ext4 images and lvm
> volumes. Thinking of creating an 'lvm' or 'ext4' distro feature like
> the 'ubi' one to enable this new support during build time.
> Let us know if there are any opinions, questions, or interest. Look
> for updates on the mailing list as we continue to make progress.
> 
> 
> [1] https://gerrit.openbmc-project.xyz/c/openbmc/meta-ibm/+/22436

[2] https://lists.ozlabs.org/pipermail/openbmc/2017-August/008703.html
[3] https://gerrit.openbmc-project.xyz/c/openbmc/docs/+/22666

Re: OpenBMC on eMMC NAND

[Adriana Kobylak]

On 2019-06-17 13:15, Adriana Kobylak wrote:
> On 2019-06-17 11:26, Adriana Kobylak wrote:
>> Hi all,
>> 
>> Joel and I have been working on getting OpenBMC to run on an eMMC 
>> NAND.
>> For the kernel, there'll be some patches coming to support it.
>> For the rootfs, the proposal is to have an ext4 filesystem, and use
>> lvm for volume management, which allows for dynamic partitioning.
> 
> I'll be filling up a design doc to document this proposal. Also we 
> don't

Design proposal up in the gerrit for review/comment[4].

> have documentation for the currently supported filesystems, so I'll be
> pushing up new docs based on Milton's writeup[2] to document the 
> existing
> implementations. The initial commit to propose a subdir to hold these
> upcoming docs is in gerrit for review[3].
> 
>> For proof of concept, we're starting to build an ext4 BMC image for
>> IBM's system Swift[1]. Up next is creating an initramfs that supports
>> lvm, and update the code update apps to handle ext4 images and lvm
>> volumes. Thinking of creating an 'lvm' or 'ext4' distro feature like
>> the 'ubi' one to enable this new support during build time.
>> Let us know if there are any opinions, questions, or interest. Look
>> for updates on the mailing list as we continue to make progress.
>> 
>> 
>> [1] https://gerrit.openbmc-project.xyz/c/openbmc/meta-ibm/+/22436
> 
> [2] https://lists.ozlabs.org/pipermail/openbmc/2017-August/008703.html
> [3] https://gerrit.openbmc-project.xyz/c/openbmc/docs/+/22666

[4] https://gerrit.openbmc-project.xyz/c/openbmc/docs/+/22854