On Thu, 29 Dec 2022 14:27:31 +0100, Krzysztof Kozlowski wrote:
> Add full cache description to DTS to avoid:
> 1. "Early cacheinfo failed" warnings,
> 2. Cache topology detection which leads to early memory allocations and
> "BUG: sleeping function called from invalid context" on PREEMPT_RT
> kernel:
>
> smp: Bringing up secondary CPUs ...
> Detected VIPT I-cache on CPU1
> BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:46
> in_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 0, name: swapper/1
> preempt_count: 1, expected: 0
> RCU nest depth: 1, expected: 1
> 3 locks held by swapper/1/0:
> #0: ffff5e337eee5f18 (&pcp->lock){+.+.}-{3:3}, at: get_page_from_freelist+0x20c/0xffc
> #1: ffffa9e24a900b18 (rcu_read_lock){....}-{1:3}, at: rt_spin_trylock+0x40/0xe4
> #2: ffff5e337efc8918 (&zone->lock){+.+.}-{3:3}, at: rmqueue_bulk+0x54/0x720
> irq event stamp: 0
> Call trace:
> __might_resched+0x17c/0x214
> rt_spin_lock+0x5c/0x100
> rmqueue_bulk+0x54/0x720
> get_page_from_freelist+0xcfc/0xffc
> __alloc_pages+0xec/0x1150
> alloc_page_interleave+0x1c/0xd0
> alloc_pages+0xec/0x160
> new_slab+0x330/0x454
> ___slab_alloc+0x5b8/0xba0
> __kmem_cache_alloc_node+0xf4/0x20c
> __kmalloc+0x60/0x100
> detect_cache_attributes+0x2a8/0x5a0
> update_siblings_masks+0x28/0x300
> store_cpu_topology+0x58/0x70
> secondary_start_kernel+0xc8/0x154
>
> [...]
Applied, thanks!
[1/1] arm64: dts: qcom: sm8250: add cache size
commit: ac1d8a8e2eb5bd67e266e3121bb6b39b7f28a9ec
Best regards,
--
Bjorn Andersson <andersson@xxxxxxxxxx>
