Re: [PATCH RFC 08/19] slab: handle kmalloc sheaves bootstrap

[Vlastimil Babka]

On 10/27/25 07:12, Harry Yoo wrote:
>> @@ -8549,6 +8559,74 @@ static struct kmem_cache * __init bootstrap(struct kmem_cache *static_cache)
>>  	return s;
>>  }
>>  
>> +/*
>> + * Finish the sheaves initialization done normally by init_percpu_sheaves() and
>> + * init_kmem_cache_nodes(). For normal kmalloc caches we have to bootstrap it
>> + * since sheaves and barns are allocated by kmalloc.
>> + */
>> +static void __init bootstrap_cache_sheaves(struct kmem_cache *s)
>> +{
>> +	struct kmem_cache_args empty_args = {};
>> +	unsigned int capacity;
>> +	bool failed = false;
>> +	int node, cpu;
>> +
>> +	capacity = calculate_sheaf_capacity(s, &empty_args);
>> +
>> +	/* capacity can be 0 due to debugging or SLUB_TINY */
>> +	if (!capacity)
>> +		return;
> 
> I think pcs->main should still be !NULL in this case?

It will remain to be set to bootstrap_sheaf, and with s->sheaf_capacity
things will continue to work.