Re: [PATCH] slub: Clear __GFP_COMP flag when allocating 0 order page

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On Thu, 11 Apr 2024, Haifeng Xu wrote:

@@ -1875,6 +1875,13 @@ static inline struct slab *alloc_slab_page(gfp_t flags, int node,
	struct slab *slab;
	unsigned int order = oo_order(oo);

+	/*
+	 * If fallback to the minimum order allocation and the order is 0,
+	 * clear the __GFP_COMP flag.
+	 */
+	if (order == 0)
+		flags = flags & ~__GFP_COMP;


This would be better placed in allocate_slab() when the need for a
fallback to a lower order is detected after the first call to alloc_slab_page().




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