From: Sebastian Andrzej Siewior Date: Wed, 15 Apr 2015 19:00:47 +0200 Subject: [PATCH 083/342] slub: Disable SLUB_CPU_PARTIAL Origin: https://git.kernel.org/cgit/linux/kernel/git/rt/linux-stable-rt.git/commit?id=3cd2c1912d56bbd633cd7fb9da7e156ec2c8019f |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: [] rcu_nocb_kthread+0x1ca/0x5d0 |Preemption disabled at:[] 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: | [] dump_stack+0x4f/0x90 | [] ___might_sleep+0x121/0x1b0 | [] rt_spin_lock+0x24/0x60 | [] __free_pages_ok+0xaa/0x540 | [] __free_pages+0x1d/0x30 | [] __free_slab+0xc5/0x1e0 | [] free_delayed+0x56/0x70 | [] put_cpu_partial+0x14d/0x220 | [] __slab_free+0x158/0x2c0 | [] kmem_cache_free+0x221/0x2d0 | [] file_free_rcu+0x2c/0x40 | [] rcu_nocb_kthread+0x243/0x5d0 | [] kthread+0xfc/0x120 | [] ret_from_fork+0x58/0x90 Signed-off-by: Sebastian Andrzej Siewior --- init/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/init/Kconfig b/init/Kconfig index 1793e8bd71ef..0c912e74ee40 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1714,7 +1714,7 @@ config SLAB_FREELIST_HARDENED 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