| From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> |
| Date: Wed, 15 Apr 2015 19:00:47 +0200 |
| Subject: slub: Disable SLUB_CPU_PARTIAL |
| |
| |BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:915 |
| |in_atomic(): 1, irqs_disabled(): 0, pid: 87, name: rcuop/7 |
| |1 lock held by rcuop/7/87: |
| | #0: (rcu_callback){......}, at: [<ffffffff8112c76a>] rcu_nocb_kthread+0x1ca/0x5d0 |
| |Preemption disabled at:[<ffffffff811eebd9>] put_cpu_partial+0x29/0x220 |
| | |
| |CPU: 0 PID: 87 Comm: rcuop/7 Tainted: G W 4.0.0-rt0+ #477 |
| |Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014 |
| | 000000000007a9fc ffff88013987baf8 ffffffff817441c7 0000000000000007 |
| | 0000000000000000 ffff88013987bb18 ffffffff810eee51 0000000000000000 |
| | ffff88013fc10200 ffff88013987bb48 ffffffff8174a1c4 000000000007a9fc |
| |Call Trace: |
| | [<ffffffff817441c7>] dump_stack+0x4f/0x90 |
| | [<ffffffff810eee51>] ___might_sleep+0x121/0x1b0 |
| | [<ffffffff8174a1c4>] rt_spin_lock+0x24/0x60 |
| | [<ffffffff811a689a>] __free_pages_ok+0xaa/0x540 |
| | [<ffffffff811a729d>] __free_pages+0x1d/0x30 |
| | [<ffffffff811eddd5>] __free_slab+0xc5/0x1e0 |
| | [<ffffffff811edf46>] free_delayed+0x56/0x70 |
| | [<ffffffff811eecfd>] put_cpu_partial+0x14d/0x220 |
| | [<ffffffff811efc98>] __slab_free+0x158/0x2c0 |
| | [<ffffffff811f0021>] kmem_cache_free+0x221/0x2d0 |
| | [<ffffffff81204d0c>] file_free_rcu+0x2c/0x40 |
| | [<ffffffff8112c7e3>] rcu_nocb_kthread+0x243/0x5d0 |
| | [<ffffffff810e951c>] kthread+0xfc/0x120 |
| | [<ffffffff8174abc8>] ret_from_fork+0x58/0x90 |
| |
| Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> |
| --- |
| init/Kconfig | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| --- a/init/Kconfig |
| +++ b/init/Kconfig |
| @@ -1865,7 +1865,7 @@ config SLAB_FREELIST_RANDOM |
| |
| config SLUB_CPU_PARTIAL |
| default y |
| - depends on SLUB && SMP |
| + depends on SLUB && SMP && !PREEMPT_RT_FULL |
| bool "SLUB per cpu partial cache" |
| help |
| Per cpu partial caches accellerate objects allocation and freeing |
