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From: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
To: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>
Cc: LKML <linux-kernel@vger.kernel.org>, Baoquan He <bhe@redhat.com>,
	Lorenzo Stoakes <lstoakes@gmail.com>,
	Christoph Hellwig <hch@infradead.org>,
	Matthew Wilcox <willy@infradead.org>,
	"Liam R . Howlett" <Liam.Howlett@oracle.com>,
	Dave Chinner <david@fromorbit.com>,
	"Paul E . McKenney" <paulmck@kernel.org>,
	Joel Fernandes <joel@joelfernandes.org>,
	Uladzislau Rezki <urezki@gmail.com>,
	Oleksiy Avramchenko <oleksiy.avramchenko@sony.com>
Subject: [PATCH 3/9] mm: vmalloc: Move vmap_init_free_space() down in vmalloc.c
Date: Mon, 22 May 2023 13:08:43 +0200	[thread overview]
Message-ID: <20230522110849.2921-4-urezki@gmail.com> (raw)
In-Reply-To: <20230522110849.2921-1-urezki@gmail.com>

A vmap_init_free_space() is a function that setups a vmap space
and is considered as part of initialization phase. Since a main
entry which is vmalloc_init(), has been moved down in vmalloc.c
it makes sense to follow the pattern.

There is no a functional change as a result of this patch.

Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
---
 mm/vmalloc.c | 82 ++++++++++++++++++++++++++--------------------------
 1 file changed, 41 insertions(+), 41 deletions(-)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 5f900efec6a9..19dcffb0d563 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2416,47 +2416,6 @@ void __init vm_area_register_early(struct vm_struct *vm, size_t align)
 	kasan_populate_early_vm_area_shadow(vm->addr, vm->size);
 }
 
-static void vmap_init_free_space(void)
-{
-	unsigned long vmap_start = 1;
-	const unsigned long vmap_end = ULONG_MAX;
-	struct vmap_area *busy, *free;
-
-	/*
-	 *     B     F     B     B     B     F
-	 * -|-----|.....|-----|-----|-----|.....|-
-	 *  |           The KVA space           |
-	 *  |<--------------------------------->|
-	 */
-	list_for_each_entry(busy, &vmap_area_list, list) {
-		if (busy->va_start - vmap_start > 0) {
-			free = kmem_cache_zalloc(vmap_area_cachep, GFP_NOWAIT);
-			if (!WARN_ON_ONCE(!free)) {
-				free->va_start = vmap_start;
-				free->va_end = busy->va_start;
-
-				insert_vmap_area_augment(free, NULL,
-					&free_vmap_area_root,
-						&free_vmap_area_list);
-			}
-		}
-
-		vmap_start = busy->va_end;
-	}
-
-	if (vmap_end - vmap_start > 0) {
-		free = kmem_cache_zalloc(vmap_area_cachep, GFP_NOWAIT);
-		if (!WARN_ON_ONCE(!free)) {
-			free->va_start = vmap_start;
-			free->va_end = vmap_end;
-
-			insert_vmap_area_augment(free, NULL,
-				&free_vmap_area_root,
-					&free_vmap_area_list);
-		}
-	}
-}
-
 static inline void setup_vmalloc_vm_locked(struct vm_struct *vm,
 	struct vmap_area *va, unsigned long flags, const void *caller)
 {
@@ -4271,6 +4230,47 @@ module_init(proc_vmalloc_init);
 
 #endif
 
+static void vmap_init_free_space(void)
+{
+	unsigned long vmap_start = 1;
+	const unsigned long vmap_end = ULONG_MAX;
+	struct vmap_area *busy, *free;
+
+	/*
+	 *     B     F     B     B     B     F
+	 * -|-----|.....|-----|-----|-----|.....|-
+	 *  |           The KVA space           |
+	 *  |<--------------------------------->|
+	 */
+	list_for_each_entry(busy, &vmap_area_list, list) {
+		if (busy->va_start - vmap_start > 0) {
+			free = kmem_cache_zalloc(vmap_area_cachep, GFP_NOWAIT);
+			if (!WARN_ON_ONCE(!free)) {
+				free->va_start = vmap_start;
+				free->va_end = busy->va_start;
+
+				insert_vmap_area_augment(free, NULL,
+					&free_vmap_area_root,
+						&free_vmap_area_list);
+			}
+		}
+
+		vmap_start = busy->va_end;
+	}
+
+	if (vmap_end - vmap_start > 0) {
+		free = kmem_cache_zalloc(vmap_area_cachep, GFP_NOWAIT);
+		if (!WARN_ON_ONCE(!free)) {
+			free->va_start = vmap_start;
+			free->va_end = vmap_end;
+
+			insert_vmap_area_augment(free, NULL,
+				&free_vmap_area_root,
+					&free_vmap_area_list);
+		}
+	}
+}
+
 void __init vmalloc_init(void)
 {
 	struct vmap_area *va;
-- 
2.30.2



  parent reply	other threads:[~2023-05-22 11:09 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-22 11:08 [PATCH 0/9] Mitigate a vmap lock contention Uladzislau Rezki (Sony)
2023-05-22 11:08 ` [PATCH 1/9] mm: vmalloc: Add va_alloc() helper Uladzislau Rezki (Sony)
2023-05-23  6:05   ` Christoph Hellwig
2023-05-23  9:57     ` Uladzislau Rezki
2023-05-27 19:55   ` Lorenzo Stoakes
2023-05-22 11:08 ` [PATCH 2/9] mm: vmalloc: Rename adjust_va_to_fit_type() function Uladzislau Rezki (Sony)
2023-05-23  6:06   ` Christoph Hellwig
2023-05-23 10:01     ` Uladzislau Rezki
2023-05-23 17:24   ` Liam R. Howlett
2023-05-24 11:51     ` Uladzislau Rezki
2023-05-27 21:50   ` Lorenzo Stoakes
2023-05-29 20:37     ` Uladzislau Rezki
2023-05-22 11:08 ` Uladzislau Rezki (Sony) [this message]
2023-05-23  6:06   ` [PATCH 3/9] mm: vmalloc: Move vmap_init_free_space() down in vmalloc.c Christoph Hellwig
2023-05-27 21:52   ` Lorenzo Stoakes
2023-05-22 11:08 ` [PATCH 4/9] mm: vmalloc: Add a per-CPU-zone infrastructure Uladzislau Rezki (Sony)
2023-05-23  6:08   ` Christoph Hellwig
2023-05-23 14:53     ` Uladzislau Rezki
2023-05-23 15:13       ` Christoph Hellwig
2023-05-23 15:32         ` Uladzislau Rezki
2023-05-22 11:08 ` [PATCH 5/9] mm: vmalloc: Insert busy-VA per-cpu zone Uladzislau Rezki (Sony)
2023-05-23  6:12   ` Christoph Hellwig
2023-05-23 15:00     ` Uladzislau Rezki
2023-05-22 11:08 ` [PATCH 6/9] mm: vmalloc: Support multiple zones in vmallocinfo Uladzislau Rezki (Sony)
2023-05-22 11:08 ` [PATCH 7/9] mm: vmalloc: Insert lazy-VA per-cpu zone Uladzislau Rezki (Sony)
2023-05-22 11:08 ` [PATCH 8/9] mm: vmalloc: Offload free_vmap_area_lock global lock Uladzislau Rezki (Sony)
     [not found]   ` <ZH0vuwaSddREy9dz@MiWiFi-R3L-srv>
     [not found]     ` <ZH7128Q0MiRh6S5f@pc638.lan>
     [not found]       ` <ZH8iWAgsDSF1I+B6@MiWiFi-R3L-srv>
2023-06-07  6:58         ` Uladzislau Rezki
2023-05-22 11:08 ` [PATCH 9/9] mm: vmalloc: Scale and activate cvz_size Uladzislau Rezki (Sony)
2023-05-23 11:59 ` [PATCH 0/9] Mitigate a vmap lock contention Hyeonggon Yoo
2023-05-23 15:12   ` Uladzislau Rezki
2023-05-23 18:04     ` Hyeonggon Yoo
2023-05-23 21:43       ` Dave Chinner
2023-05-24  1:30         ` Hyeonggon Yoo
2023-05-24  9:50       ` Uladzislau Rezki
2023-05-24 21:56         ` Dave Chinner
2023-05-25  7:59           ` Christoph Hellwig
2023-05-25 10:20           ` Uladzislau Rezki

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