diff options
| author | Richard Weinberger <rw@linutronix.de> | 2011-12-12 14:35:56 +0100 |
|---|---|---|
| committer | Clark Williams <williams@redhat.com> | 2012-02-15 10:33:01 -0600 |
| commit | a56efcb45d70167723e279eb2681bdafad7c139c (patch) | |
| tree | ef4ba2a108f0730b630d18748a6c64b327387c02 /kernel/exec_domain.c | |
| parent | f720c21d286eafadca4882a35b24dfc6ddef4220 (diff) | |
printk: Disable migration instead of preemption
There is no need do disable preemption in vprintk(), disable_migrate()
is sufficient. This fixes the following bug in -rt:
[ 14.759233] BUG: sleeping function called from invalid context
at /home/rw/linux-rt/kernel/rtmutex.c:645
[ 14.759235] in_atomic(): 1, irqs_disabled(): 0, pid: 547, name: bash
[ 14.759244] Pid: 547, comm: bash Not tainted 3.0.12-rt29+ #3
[ 14.759246] Call Trace:
[ 14.759301] [<ffffffff8106fade>] __might_sleep+0xeb/0xf0
[ 14.759318] [<ffffffff810ad784>] rt_spin_lock_fastlock.constprop.9+0x21/0x43
[ 14.759336] [<ffffffff8161fef0>] rt_spin_lock+0xe/0x10
[ 14.759354] [<ffffffff81347ad1>] serial8250_console_write+0x81/0x121
[ 14.759366] [<ffffffff8107ecd3>] __call_console_drivers+0x7c/0x93
[ 14.759369] [<ffffffff8107ef31>] _call_console_drivers+0x5c/0x60
[ 14.759372] [<ffffffff8107f7e5>] console_unlock+0x147/0x1a2
[ 14.759374] [<ffffffff8107fd33>] vprintk+0x3ea/0x462
[ 14.759383] [<ffffffff816160e0>] printk+0x51/0x53
[ 14.759399] [<ffffffff811974e4>] ? proc_reg_poll+0x9a/0x9a
[ 14.759403] [<ffffffff81335b42>] __handle_sysrq+0x50/0x14d
[ 14.759406] [<ffffffff81335c8a>] write_sysrq_trigger+0x4b/0x53
[ 14.759408] [<ffffffff81335c3f>] ? __handle_sysrq+0x14d/0x14d
[ 14.759410] [<ffffffff81197583>] proc_reg_write+0x9f/0xbe
[ 14.759426] [<ffffffff811497ec>] vfs_write+0xac/0xf3
[ 14.759429] [<ffffffff8114a9b3>] ? fget_light+0x3a/0x9b
[ 14.759431] [<ffffffff811499db>] sys_write+0x4a/0x6e
[ 14.759438] [<ffffffff81625d52>] system_call_fastpath+0x16/0x1b
Signed-off-by: Richard Weinberger <rw@linutronix.de>
Link: http://lkml.kernel.org/r/1323696956-11445-1-git-send-email-rw@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/exec_domain.c')
0 files changed, 0 insertions, 0 deletions