> Can I use kmem_cache_alloc(mycache_cachep, SLAB_KERNEL) within a
> kernel_lock/kernel_unlock block? Or should it be SLAB_ATOMIC?
kernel_lock/kernel_unlock is not a spinlock in the classic Linux sense.
It's automatically undone on scheduling, so you can hold it while
rescheduling, and it will be automatically re-acquired once the process
gets runnable again.
Ingo
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