I'm running Debian with 3.2 kernel which is totally good. But I wanted to hack the newest kernel. After installing 3.15.6 (latest stable so far) I realized that my wifi card doesn't work and in fact wasn't recognized.
So I got help from Linux Kernel specialists and found out have to do 'git bisect'.
Now, I need to do it roughly 17 times and boot into built kernel each time to get to the bottom of it finding the very first bad commit to report that, in order to fix the bug.
my question is this: Is it safe for my device to reboot at least 17 times in some continuous hours?
Thank you in advance.

I think you misunderstand what git bisect is used for. You need to write a test that works against the source code from a point that you know works to the point that you know is broken. git bisect will iterate through the history of a git repository executing that test and let you know which commit it starts failing. That is to say you have to clone the Linux kernel git repository and work from two points in the history (or a git repository that is associated with your currently running kernel).

Are you sure that Debian didn't create some patch or hack on the kernel which hasn't been pushed upstream? Try compiling the 3.2 kernel from kernel.org. Is your wifi card still detected then?

If not, then it is likely Debian integrated some patch which you'll have to figure out and forward port to the latest kernel.

Ook git voodoo ook ...

Linux is definitely the bees knees! ...

Kindly learn some manners and respect before posting to our common space here on LQ.

If you need help, ask.

If you are just here to foul the carpet and disturb everyone else, please find the exit.

well it sounds like you are
-- to use a metaphor --

trying to operate a F1 race car before you learned to drive,
or at least BEFORE you went to racing school to LEARN to operate a F1 race car .

you did not learn how to hack the Microsoft Windows System registry overnight

or
can you even hack the HKEY's ?

Can you please refrain from posting if you have nothing useful to say; this is a community
forum, not a troll cave or personal ramble blog-site.