On 27/03/18 05:31, Matthew Wilcox wrote:
> On Tue, Mar 27, 2018 at 04:55:21AM +0300, Igor Stoppa wrote:
>> +static inline void *pmalloc_array_align(struct pmalloc_pool *pool,
>> + size_t n, size_t size,
>> + short int align_order)
>> +{
>
> You're missing:
>
> if (size != 0 && n > SIZE_MAX / size)
> return NULL;
ACK
>> + return pmalloc_align(pool, n * size, align_order);
>> +}
>
>> +static inline void *pcalloc_align(struct pmalloc_pool *pool, size_t n,
>> + size_t size, short int align_order)
>> +{
>> + return pzalloc_align(pool, n * size, align_order);
>> +}
>
> Ditto.
ok
>> +static inline void *pcalloc(struct pmalloc_pool *pool, size_t n,
>> + size_t size)
>> +{
>> + return pzalloc_align(pool, n * size, PMALLOC_ALIGN_DEFAULT);
>> +}
>
> If you make this one:
>
> return pcalloc_align(pool, n, size, PMALLOC_ALIGN_DEFAULT)
ok
> then you don't need the check in this function.
>
> Also, do we really need 'align' as a parameter to the allocator functions
> rather than to the pool?
I actually wrote it first without, but then I wondered how to deal if
one needs to allocate both small fry structures and then something
larger that is page aligned.
However it's just speculation, I do not have any real example.
> I'd just reuse ARCH_KMALLOC_MINALIGN from slab.h as the alignment, and
> then add the special alignment options when we have a real user for them.
ok
--
thanks, igor
