Hi all,

I use the tip/sched/core branch.

After git pulling yesterday, my host is unresponsive after booting the OS.

 * It boots normally
 * It sends info to the console
 * The graphics does not work
* The terminals show the prompt, I can enter the username but after pressing enter, it does not give the password prompt * sysrq works more or less, I can't get the process stack but it receives the command

It is like no new process can be created.

I have a dual Xeon processor E5325 (2 x 4 cores).

After git bisecting, the following patch seems to introduce the bug.

commit d50dde5a10f305253cbc3855307f608f8a3c5f73
Author: Dario Faggioli <raist...@linux.it>
Date:   Thu Nov 7 14:43:36 2013 +0100

sched: Add new scheduler syscalls to support an extended scheduling parameters ABI

    Add the syscalls needed for supporting scheduling algorithms
    with extended scheduling parameters (e.g., SCHED_DEADLINE).


[ ... ]


    Signed-off-by: Dario Faggioli <raist...@linux.it>
    [ Rewrote to use sched_attr. ]
    Signed-off-by: Juri Lelli <juri.le...@gmail.com>
    [ Removed sched_setscheduler2() for now. ]
    Signed-off-by: Peter Zijlstra <pet...@infradead.org>
Link: http://lkml.kernel.org/r/1383831828-15501-3-git-send-email-juri.le...@gmail.com
    Signed-off-by: Ingo Molnar <mi...@kernel.org>

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