Hope the summary can help embedded system newbies to select right kernel for developing.
Latest stable kernel version is 22.214.171.124.
state of kernel trees, as of Jyly 14, 2010
linux-next: next-20100714 2010-07-14
mainline: 2.6.35-rc5 2010-07-12
snapshot: 2.6.35-rc4-git5 2010-07-12
stable: 126.96.36.199 2010-07-05
stable: 188.8.131.52 2010-07-05
stable: 184.108.40.206 2010-07-05
stable: 220.127.116.11 2010-07-05
stable: 18.104.22.168 2010-07-05
stable: 22.214.171.124 2010-02-01
Here’s the state of the -stable kernel trees, as of January 18, 2010.
The 2.6.27-stable kernel tree is still living on, as a “long-term” stable release. But, I do have to warn users of this tree, the older it gets, the less viable it becomes. Not all bugfixes are being backported to this kernel version due to massive code changes in the over 2 years since this kernel has been released. I am doing my best to backport fixes that I become aware of, and I encourage anyone who does fix any types of bugs in the main kernel tree to let me know if the change should be applied to this older kernel version.
I’ll probably keep maintaining it for at least 6-8 more months, but after that, I can not guarantee it’s viability. Note, one other developer has volunteered to pick up the tree after I am finished with it, but I can not speak for him at this time.
Today the last 2.6.31-stable kernel was released, all users of this kernel series are strongly encouraged to switch to the 2.6.32 kernel series, as there will not be any more updates for this branch in the future.
I’d like to announce that the 2.6.32-stable tree is also going to be maintained as a “long-term” stable release, living for 2-3 years, like the 2.6.27 kernel is. This is because a number (i.e. more than 2) Linux distributions are basing their “enterprise” releases on this kernel version, and it will make their lives easier if I keep it alive.
Note, the viability of me keeping this tree alive for such a length of time relies on the developers working for those distros to keep me informed of patches that need to be backported and applied to it. Without their help, I will have no problem in stopping the maintenance of the tree.
Reference link: http://www.kroah.com/log/linux/stable-status-01-2010.html