01c1167336
If the PR server or indeed any other child process takes some time to exit (which it sometimes does when saving its database), it can end up holding bitbake.lock after the UI exits, which led to errors if you ran bitbake commands successively - we saw this when running the PR server oe-selftest tests in OE-Core. The recent attempt to fix this wasn't quite right and ended up breaking memory resident bitbake. This time we close the lock file when cooker shuts down (inside the UI process) instead of unlocking it, and this is done in the cooker code rather than the actual UI code so it doesn't matter which UI is in use. Additionally we report that we're waiting for the lock to be released, using lsof or fuser if available to list the processes with the lock open. The 'magic' in the locking is due to all spawned subprocesses of bitbake holding an open file descriptor to the bitbake.lock. It is automatically unlocked when all those fds close the file (as all the processes terminate). We close the UI copy of the lock explicitly, then close the server process copy, any remaining open copy is therefore some proess exiting. (The reproducer for the problem is to set PRSERV_HOST = "localhost:0" and add a call to time.sleep(20) after self.server_close() in lib/prserv/serv.py, then run "bitbake -p; bitbake -p" ). Cleanup work done by Paul Eggleton <paul.eggleton@linux.intel.com>. This reverts bitbake commit 69ecd15aece54753154950c55d7af42f85ad8606 and e97a9f1528d77503b5c93e48e3de9933fbb9f3cd. (Bitbake rev: a29780bd43f74b7326fe788dbd65177b86806fcf) (Bitbake rev: 830b8f31459ca484bdaf2caa8ff4b7cbf21c77ac) Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> Signed-off-by: Saul Wold <sgw@linux.intel.com> Conflicts: bitbake/lib/bb/cooker.py bitbake/lib/bb/main.py bitbake/lib/bb/tinfoil.py bitbake/lib/bb/ui/knotty.py Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Poky
Poky is an integration of various components to form a complete prepackaged build system and development environment. It features support for building customised embedded device style images. There are reference demo images featuring a X11/Matchbox/GTK themed UI called Sato. The system supports cross-architecture application development using QEMU emulation and a standalone toolchain and SDK with 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 layers which extend the systems capabilities in a modular way.
As an integration layer Poky consists of several upstream projects such as BitBake, OpenEmbedded-Core, Yocto documentation and various sources of information e.g. for the hardware support. Poky is in turn a component of the Yocto Project.
The Yocto Project has extensive documentation about the system including a reference manual which can be found at: http://yoctoproject.org/documentation
OpenEmbedded-Core is a layer containing the core metadata for current versions of OpenEmbedded. It is distro-less (can build a functional image with DISTRO = "nodistro") and contains only emulated machine support.
For information about OpenEmbedded, see the OpenEmbedded website: http://www.openembedded.org/
Where to Send Patches
As Poky is an integration repository, patches against the various components should be sent to their respective upstreams.
bitbake: bitbake-devel@lists.openembedded.org
meta-yocto: poky@yoctoproject.org
Most everything else should be sent to the OpenEmbedded Core mailing list. If in doubt, check the oe-core git repository for the content you intend to modify. Before sending, be sure the patches apply cleanly to the current oe-core git repository. openembedded-core@lists.openembedded.org
Note: The scripts directory should be treated with extra care as it is a mix of oe-core and poky-specific files.