lab1
lab2
lab3
update
Merge branch 'updates' into lab1
Merge branch 'updates' into lab2
Merge branch 'updates' into lab3
update2
Merge branch 'update2' into lab3
make gdb target

use 'make gdb' to start gdb
Merge branch 'gdb-make' into lab1
Merge branch 'gdb-make' into lab2
Merge branch 'gdb-make' into lab3
up to ex 11
done with kdebug, work on monitor
some things
some things2
working
ready to submit my lab
Merge branch 'lab1' of http://pdos.csail.mit.edu/6.828/2014-jos into lab1