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Date: Fri, 5 Apr 2024 12:44:22 +0200
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Subject: Re: [PATCH net-next v9 4/9] slab: introduce kvmalloc_array_node() and
 kvcalloc_node()
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To: Alexander Lobakin <aleksander.lobakin@intel.com>,
 "David S. Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>,
 Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>
Cc: Alexander Duyck <alexanderduyck@fb.com>,
 Yunsheng Lin <linyunsheng@huawei.com>,
 Jesper Dangaard Brouer <hawk@kernel.org>,
 Ilias Apalodimas <ilias.apalodimas@linaro.org>,
 Christoph Lameter <cl@linux.com>, Andrew Morton <akpm@linux-foundation.org>,
 nex.sw.ncis.osdt.itp.upstreaming@intel.com, netdev@vger.kernel.org,
 intel-wired-lan@lists.osuosl.org, linux-mm@kvack.org,
 linux-kernel@vger.kernel.org, Suren Baghdasaryan <surenb@google.com>,
 Kent Overstreet <kent.overstreet@linux.dev>
References: <20240404154402.3581254-1-aleksander.lobakin@intel.com>
 <20240404154402.3581254-5-aleksander.lobakin@intel.com>
From: Vlastimil Babka <vbabka@suse.cz>
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In-Reply-To: <20240404154402.3581254-5-aleksander.lobakin@intel.com>
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On 4/4/24 5:43 PM, Alexander Lobakin wrote:
> Add NUMA-aware counterparts for kvmalloc_array() and kvcalloc() to be
> able to flexibly allocate arrays for a particular node.
> Rewrite kvmalloc_array() to kvmalloc_array_node(NUMA_NO_NODE) call.
> 
> Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>

Acked-by: Vlastimil Babka <vbabka@suse>

This will however cause some conflicts with alloc tagging series with mm
tree in next and the new wrappers will have to be adjusted.

> ---
>  include/linux/slab.h | 17 +++++++++++++++--
>  1 file changed, 15 insertions(+), 2 deletions(-)
> 
> diff --git a/include/linux/slab.h b/include/linux/slab.h
> index e53cbfa18325..d1d1fa5e7983 100644
> --- a/include/linux/slab.h
> +++ b/include/linux/slab.h
> @@ -774,14 +774,27 @@ static inline __alloc_size(1) void *kvzalloc(size_t size, gfp_t flags)
>  	return kvmalloc(size, flags | __GFP_ZERO);
>  }
>  
> -static inline __alloc_size(1, 2) void *kvmalloc_array(size_t n, size_t size, gfp_t flags)
> +static inline __alloc_size(1, 2) void *
> +kvmalloc_array_node(size_t n, size_t size, gfp_t flags, int node)
>  {
>  	size_t bytes;
>  
>  	if (unlikely(check_mul_overflow(n, size, &bytes)))
>  		return NULL;
>  
> -	return kvmalloc(bytes, flags);
> +	return kvmalloc_node(bytes, flags, node);
> +}
> +
> +static inline __alloc_size(1, 2) void *
> +kvmalloc_array(size_t n, size_t size, gfp_t flags)
> +{
> +	return kvmalloc_array_node(n, size, flags, NUMA_NO_NODE);
> +}
> +
> +static inline __alloc_size(1, 2) void *
> +kvcalloc_node(size_t n, size_t size, gfp_t flags, int node)
> +{
> +	return kvmalloc_array_node(n, size, flags | __GFP_ZERO, node);
>  }
>  
>  static inline __alloc_size(1, 2) void *kvcalloc(size_t n, size_t size, gfp_t flags)