6d31c38c08
On master oe, build a qemuppc64 with systemd as default init, when we use nfs bootup, the kernel might panic due to missing symbol in dynamic libraries as below: hid-generic 0003:0627:0001.0003: input: USB HID v0.01 Mouse [QEMU QEMU USB Tablet] on usb-0000:00:01.0-3/input0 /sbin/init: /lib64/libm.so.6: version `XZ_5.0' not found (required by /usr/lib64/libkmod.so.2) Kernel panic - not syncing: Attempted to kill init! exitcode=0x00007f00 CPU: 0 PID: 1 Comm: init Not tainted 5.15.78-yocto-standard #1 Call Trace: [c000000007443ba0] [c0000000009538d0] dump_stack_lvl+0x74/0xa8 (unreliable) [c000000007443be0] [c000000000103524] panic+0x170/0x3cc [c000000007443c80] [c00000000010cf64] do_exit+0xb44/0xb50 [c000000007443d50] [c00000000010d040] do_group_exit+0x60/0xd0 [c000000007443d90] [c00000000010d0d4] sys_exit_group+0x24/0x30 [c000000007443db0] [c00000000002cfd4] system_call_exception+0x194/0x2f0 [c000000007443e10] [c00000000000c2cc] system_call_common+0xec/0x250 --- interrupt: c00 at 0x7fff9ed9e840 NIP: 00007fff9ed9e840 LR: 00007fff9ed7da20 CTR: 0000000000000000 REGS: c000000007443e80 TRAP: 0c00 Not tainted (5.15.78-yocto-standard) MSR: 800000000280f033 <SF,VEC,VSX,EE,PR,FP,ME,IR,DR,RI,LE> CR: 24022442 XER: 00000000 One or more of the libraries systemd depends on failed to load due to unresolved symbols/functions. This was intermittent - with a failure rate estimated between 5% and 30%. After checking the code, this issue happens on gcc 12, kirkstone is using gcc 11 works well, with both using the exact same v5.15.84 kernel commit. There is a kernel fix from upstream [1], they changed the rsize / wsize to a multiple of PAGE_SIZE, when we applied this patch, the qemuppc64's default r/wsize went from 4096 to 524288.But the qemuppc64 doesn't have its own linux-yocto kernel branch, so apply this change might cause regression with other platforms which share branch with qemuppc64. So, we added an extra option for nfs rootfs, and set the qemuppc64 default r/w size to 524288 to line up with the kernel fix[1]. Yocto did a similar thing in the distant past[2] - prior to boot-arg adjustments existing - by allowing a Kconfig to set the defaults on nfsboot, in order to work around hardware limitations. Reference: [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=940261a195080cf [2] https://git.yoctoproject.org/linux-yocto-4.1/commit/?h=standard/base&id=a96cfd98add95 (From OE-Core rev: 14a81556ff1be326647e654424c8f1bf9d0db912) Signed-off-by: Xiangyu Chen <xiangyu.chen@windriver.com> Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Poky
Poky is an integration of various components to form a pre-packaged build system and development environment which is used as a development and validation tool by the Yocto Project. It features support for building customised embedded style device images and custom containers. There are reference demo images ranging from X11/GTK+ to Weston, commandline and more. The system supports cross-architecture application development using QEMU emulation and a standalone toolchain and SDK suitable for IDE integration.
Additional information on the specifics of hardware that Poky supports is available in README.hardware. Further hardware support can easily be added in the form of BSP layers which extend the systems capabilities in a modular way. Many layers are available and can be found through the layer index.
As an integration layer Poky consists of several upstream projects such as BitBake, OpenEmbedded-Core, Yocto documentation, the 'meta-yocto' layer which has configuration and hardware support components. These components are all part of the Yocto Project and OpenEmbedded ecosystems.
The Yocto Project has extensive documentation about the system including a reference manual which can be found at https://docs.yoctoproject.org/
OpenEmbedded is the build architecture used by Poky and the Yocto project. For information about OpenEmbedded, see the OpenEmbedded website.
Contribution Guidelines
The project works using a mailing list patch submission process. Patches should be sent to the mailing list for the repository the components originate from (see below). Throughout the Yocto Project, the README files in the component in question should detail where to send patches, who the maintainers are and where bugs should be reported.
A guide to submitting patches to OpenEmbedded is available at:
https://www.openembedded.org/wiki/How_to_submit_a_patch_to_OpenEmbedded
There is good documentation on how to write/format patches at:
https://www.openembedded.org/wiki/Commit_Patch_Message_Guidelines
Where to Send Patches
As Poky is an integration repository (built using a tool called combo-layer), patches against the various components should be sent to their respective upstreams:
OpenEmbedded-Core (files in meta/, meta-selftest/, meta-skeleton/, scripts/):
- Git repository: https://git.openembedded.org/openembedded-core/
- Mailing list: openembedded-core@lists.openembedded.org
BitBake (files in bitbake/):
- Git repository: https://git.openembedded.org/bitbake/
- Mailing list: bitbake-devel@lists.openembedded.org
Documentation (files in documentation/):
- Git repository: https://git.yoctoproject.org/cgit/cgit.cgi/yocto-docs/
- Mailing list: docs@lists.yoctoproject.org
meta-yocto (files in meta-poky/, meta-yocto-bsp/):
- Git repository: https://git.yoctoproject.org/cgit/cgit.cgi/meta-yocto
- Mailing list: poky@lists.yoctoproject.org
If in doubt, check the openembedded-core git repository for the content you intend to modify as most files are from there unless clearly one of the above categories. Before sending, be sure the patches apply cleanly to the current git repository branch in question.