linux-kernel - [PATCH v4 8/9] mm, vma: use percpu sheaves for vm_area

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Message-Id: <20250425-slub-percpu-caches-v4-8-8a636982b4a4@suse.cz>
Date: Fri, 25 Apr 2025 10:27:28 +0200
From: Vlastimil Babka <vbabka@...e.cz>
To: Suren Baghdasaryan <surenb@...gle.com>, 
 "Liam R. Howlett" <Liam.Howlett@...cle.com>, 
 Christoph Lameter <cl@...ux.com>, David Rientjes <rientjes@...gle.com>
Cc: Roman Gushchin <roman.gushchin@...ux.dev>, 
 Harry Yoo <harry.yoo@...cle.com>, Uladzislau Rezki <urezki@...il.com>, 
 linux-mm@...ck.org, linux-kernel@...r.kernel.org, rcu@...r.kernel.org, 
 maple-tree@...ts.infradead.org, vbabka@...e.cz
Subject: [PATCH v4 8/9] mm, vma: use percpu sheaves for vm_area_struct
 cache

Create the vm_area_struct cache with percpu sheaves of size 32 to
improve its performance.

Signed-off-by: Vlastimil Babka <vbabka@...e.cz>
---
 kernel/fork.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/fork.c b/kernel/fork.c
index c4b26cd8998b8e7b2b516e0bb0b1d4676ff644dc..3bd711f0798c88aee04bc30ff21fc4ca2b66201a 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -3216,6 +3216,7 @@ void __init proc_caches_init(void)
 	struct kmem_cache_args args = {
 		.use_freeptr_offset = true,
 		.freeptr_offset = offsetof(struct vm_area_struct, vm_freeptr),
+		.sheaf_capacity = 32,
 	};

 	sighand_cachep = kmem_cache_create("sighand_cache",

-- 
2.49.0