linux-kernel - [PATCH 1/6] mm: Add vmalloc_huge

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Message-Id: <20241025093944.372391936@infradead.org>
Date: Fri, 25 Oct 2024 11:03:48 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: tglx@...utronix.de
Cc: linux-kernel@...r.kernel.org,
 peterz@...radead.org,
 mingo@...hat.com,
 dvhart@...radead.org,
 dave@...olabs.net,
 andrealmeid@...lia.com,
 Andrew Morton <akpm@...ux-foundation.org>,
 urezki@...il.com,
 hch@...radead.org,
 lstoakes@...il.com,
 Arnd Bergmann <arnd@...db.de>,
 linux-api@...r.kernel.org,
 linux-mm@...ck.org,
 linux-arch@...r.kernel.org,
 malteskarupke@....de,
 cl@...ux.com,
 llong@...hat.com,
 Christoph Hellwig <hch@....de>
Subject: [PATCH 1/6] mm: Add vmalloc_huge_node()

To enable node specific hash-tables.

Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Christoph Hellwig <hch@....de>
---
 include/linux/vmalloc.h |    3 +++
 mm/vmalloc.c            |    7 +++++++
 2 files changed, 10 insertions(+)

--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -177,6 +177,9 @@ void *__vmalloc_node_noprof(unsigned lon
 void *vmalloc_huge_noprof(unsigned long size, gfp_t gfp_mask) __alloc_size(1);
 #define vmalloc_huge(...)	alloc_hooks(vmalloc_huge_noprof(__VA_ARGS__))
 
+void *vmalloc_huge_node_noprof(unsigned long size, gfp_t gfp_mask, int node) __alloc_size(1);
+#define vmalloc_huge_node(...)	alloc_hooks(vmalloc_huge_node_noprof(__VA_ARGS__))
+
 extern void *__vmalloc_array_noprof(size_t n, size_t size, gfp_t flags) __alloc_size(1, 2);
 #define __vmalloc_array(...)	alloc_hooks(__vmalloc_array_noprof(__VA_ARGS__))
 
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -3948,6 +3948,13 @@ void *vmalloc_huge_noprof(unsigned long
 }
 EXPORT_SYMBOL_GPL(vmalloc_huge_noprof);
 
+void *vmalloc_huge_node_noprof(unsigned long size, gfp_t gfp_mask, int node)
+{
+	return __vmalloc_node_range(size, 1, VMALLOC_START, VMALLOC_END,
+				    gfp_mask, PAGE_KERNEL, VM_ALLOW_HUGE_VMAP,
+				    node, __builtin_return_address(0));
+}
+
 /**
  * vzalloc - allocate virtually contiguous memory with zero fill
  * @size:    allocation size