diff options
| author | Mike Galbraith <bitbucket@online.de> | 2014-03-03 05:57:26 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-03-03 09:34:10 -0700 |
| commit | 2a26ebef841bac72a4c5776e920496e07b405628 (patch) | |
| tree | 33be345f479d83169e392e90fb574abeb51eb2f0 /block/blk-mq-cpu.c | |
| parent | eec70897d81bb2913e22c6792ea2739faf59c3e1 (diff) | |
| download | lwn-2a26ebef841bac72a4c5776e920496e07b405628.tar.gz lwn-2a26ebef841bac72a4c5776e920496e07b405628.zip | |
rt,blk,mq: Make blk_mq_cpu_notify_lock a raw spinlock
[ 365.164040] BUG: sleeping function called from invalid context at kernel/rtmutex.c:674
[ 365.164041] in_atomic(): 1, irqs_disabled(): 1, pid: 26, name: migration/1
[ 365.164043] no locks held by migration/1/26.
[ 365.164044] irq event stamp: 6648
[ 365.164056] hardirqs last enabled at (6647): [<ffffffff8153d377>] restore_args+0x0/0x30
[ 365.164062] hardirqs last disabled at (6648): [<ffffffff810ed98d>] multi_cpu_stop+0x9d/0x120
[ 365.164070] softirqs last enabled at (0): [<ffffffff810543bc>] copy_process.part.28+0x6fc/0x1920
[ 365.164072] softirqs last disabled at (0): [< (null)>] (null)
[ 365.164076] CPU: 1 PID: 26 Comm: migration/1 Tainted: GF N 3.12.12-rt19-0.gcb6c4a2-rt #3
[ 365.164078] Hardware name: QCI QSSC-S4R/QSSC-S4R, BIOS QSSC-S4R.QCI.01.00.S013.032920111005 03/29/2011
[ 365.164091] 0000000000000001 ffff880a42ea7c30 ffffffff815367e6 ffffffff81a086c0
[ 365.164099] ffff880a42ea7c40 ffffffff8108919c ffff880a42ea7c60 ffffffff8153c24f
[ 365.164107] ffff880a42ea91f0 00000000ffffffe1 ffff880a42ea7c88 ffffffff81297ec0
[ 365.164108] Call Trace:
[ 365.164119] [<ffffffff810060b1>] try_stack_unwind+0x191/0x1a0
[ 365.164127] [<ffffffff81004872>] dump_trace+0x92/0x360
[ 365.164133] [<ffffffff81006108>] show_trace_log_lvl+0x48/0x60
[ 365.164138] [<ffffffff81004c18>] show_stack_log_lvl+0xd8/0x1d0
[ 365.164143] [<ffffffff81006160>] show_stack+0x20/0x50
[ 365.164153] [<ffffffff815367e6>] dump_stack+0x54/0x9a
[ 365.164163] [<ffffffff8108919c>] __might_sleep+0xfc/0x140
[ 365.164173] [<ffffffff8153c24f>] rt_spin_lock+0x1f/0x70
[ 365.164182] [<ffffffff81297ec0>] blk_mq_main_cpu_notify+0x20/0x70
[ 365.164191] [<ffffffff81540a1c>] notifier_call_chain+0x4c/0x70
[ 365.164201] [<ffffffff81083499>] __raw_notifier_call_chain+0x9/0x10
[ 365.164207] [<ffffffff810567be>] cpu_notify+0x1e/0x40
[ 365.164217] [<ffffffff81525da2>] take_cpu_down+0x22/0x40
[ 365.164223] [<ffffffff810ed9c6>] multi_cpu_stop+0xd6/0x120
[ 365.164229] [<ffffffff810edd97>] cpu_stopper_thread+0xd7/0x1e0
[ 365.164235] [<ffffffff810863a3>] smpboot_thread_fn+0x203/0x380
[ 365.164241] [<ffffffff8107cbf8>] kthread+0xc8/0xd0
[ 365.164250] [<ffffffff8154440c>] ret_from_fork+0x7c/0xb0
[ 365.164429] smpboot: CPU 1 is now offline
Signed-off-by: Mike Galbraith <bitbucket@online.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq-cpu.c')
| -rw-r--r-- | block/blk-mq-cpu.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/block/blk-mq-cpu.c b/block/blk-mq-cpu.c index 3146befb56aa..136ef8643bba 100644 --- a/block/blk-mq-cpu.c +++ b/block/blk-mq-cpu.c @@ -11,7 +11,7 @@ #include "blk-mq.h" static LIST_HEAD(blk_mq_cpu_notify_list); -static DEFINE_SPINLOCK(blk_mq_cpu_notify_lock); +static DEFINE_RAW_SPINLOCK(blk_mq_cpu_notify_lock); static int blk_mq_main_cpu_notify(struct notifier_block *self, unsigned long action, void *hcpu) @@ -19,12 +19,12 @@ static int blk_mq_main_cpu_notify(struct notifier_block *self, unsigned int cpu = (unsigned long) hcpu; struct blk_mq_cpu_notifier *notify; - spin_lock(&blk_mq_cpu_notify_lock); + raw_spin_lock(&blk_mq_cpu_notify_lock); list_for_each_entry(notify, &blk_mq_cpu_notify_list, list) notify->notify(notify->data, action, cpu); - spin_unlock(&blk_mq_cpu_notify_lock); + raw_spin_unlock(&blk_mq_cpu_notify_lock); return NOTIFY_OK; } @@ -32,16 +32,16 @@ void blk_mq_register_cpu_notifier(struct blk_mq_cpu_notifier *notifier) { BUG_ON(!notifier->notify); - spin_lock(&blk_mq_cpu_notify_lock); + raw_spin_lock(&blk_mq_cpu_notify_lock); list_add_tail(¬ifier->list, &blk_mq_cpu_notify_list); - spin_unlock(&blk_mq_cpu_notify_lock); + raw_spin_unlock(&blk_mq_cpu_notify_lock); } void blk_mq_unregister_cpu_notifier(struct blk_mq_cpu_notifier *notifier) { - spin_lock(&blk_mq_cpu_notify_lock); + raw_spin_lock(&blk_mq_cpu_notify_lock); list_del(¬ifier->list); - spin_unlock(&blk_mq_cpu_notify_lock); + raw_spin_unlock(&blk_mq_cpu_notify_lock); } void blk_mq_init_cpu_notifier(struct blk_mq_cpu_notifier *notifier, |