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Roy.Li
b68fb414f9
[YOCTO #2755] When watchdog works on ping mode, the system will be rebooted since watchdog can not receive the expected ECOREPLY on a setting interval. Ping mode uses a raw socket to send a ECO packet, then uses select() to wait and recvfrom() to receive the ECOREPLY packet, if select() shows the data is ready, and the data is not the expected ECOREPLY, and waiting time is not overdue, it will continue use select() and recvfrom(). Problem is that the raw socket can receive any icmp packets, if we do not set filters, and there are many icmp packets on socket, this program will not find its interested ECOREPLY packet in a special interval, which makes the ping mode fail. Other program is that watchdog sometime can not reach the call of recvfrom to try to receive packets since tv_sec of struct timeval of select parameter is 0. The timeout of select() is the result of ping interval minusing the time of calling gettimeofday spending, when ping interval is 1 second, and the call of gettimeofday() spends several useconds, the tv_sec of struct timeval of select parameter must be 0, at that condition, we should think it is valid of tv_sec of struct timeval of select parameter be 0 (From OE-Core rev: 90f3a90413aa1e08c3206b838dcaee0c1c640dc7) Signed-off-by: Roy.Li <rongqing.li@windriver.com> 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 = "") and contains only emulated machine support.
For information about OpenEmbedded, see the OpenEmbedded website:
http://www.openembedded.org/