Thanks for all of you. I have understood it. Just making a summary. In September 2007 Morton decided to stop maintaining the -mm tree. In February 2008, Stephen Rothwell created the linux-next tree.[1] The linux-next tree is a staging trees, where subsystem trees are collected for testing and review.[2] Linux-next tree holds code that will go into the mainline during the next merge window.[3] Stephen said, about 90% of the code that shows up in the mainline during the merge window was in linux-next prior to the opening of the window.[3] [1]:https://en.wikipedia.org/wiki/Linux_kernel [2]:http://www.linuxfoundation.org/content/how-participate-linux-community-0 [3]:https://lwn.net/Articles/608933/ Other materials: https://lwn.net/Articles/608917/ https://lwn.net/Articles/571980/ https://lwn.net/Articles/287155/ Regards, Hao Lee _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
