Hi Peter,

We noticed the below changes on

git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/wait
commit d58d631b474c552dce72da2dce9dd276d731b79a ("sched: Fix finish_task_switch vs prev_state")

test case: vm-vp-quantal-x86_64/boot/1

9e6e6179961e8dd  d58d631b474c552dce72da2dc  testbox/testcase/testparams
---------------  -------------------------  ---------------------------
         0           +Inf%          1 ± 0%  TOTAL dmesg.Out_of_memory:Kill_process
         0           +Inf%          0 ±50%  TOTAL dmesg.Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes

In commit 9e6e6179961e8dd, the boot dmesg is

[    7.537598] Freeing unused kernel memory: 3352K (ffffffff82230000 - ffffffff82576000)
[    7.558273] random: init urandom read with 11 bits of entropy available
[    7.687132] init: Failed to create pty - disabling logging for job
[    7.688578] init: Temporary process spawn error: No space left on device
[   68.298970] reboot: Restarting system

In d58d631b474c552dce72da2dc, the OOM occurred immediately after the
"No space left on device" line. The qemu has mem=320M and the initrds
are 24M in total. What's interesting is, in the 5 boot tests for
d58d631b47 and its parent commit, this OOM message is 100%
reproducible on commit d58d631b47, while its parent boots all fine. 

Thanks,
Fengguang