From: Baoquan He <bhe@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org, mhocko@suse.com, akpm@linux-foundation.org,
david@redhat.com, willy@infradead.org, richard.weiyang@gmail.com,
vbabka@suse.cz
Subject: [PATCH v5 1/2] mm/sparse.c: Use kvmalloc/kvfree to alloc/free memmap for the classic sparse
Date: Mon, 16 Mar 2020 20:54:50 +0800 [thread overview]
Message-ID: <20200316125450.GG3486@MiWiFi-R3L-srv> (raw)
In-Reply-To: <20200316102150.16487-1-bhe@redhat.com>
This change makes populate_section_memmap()/depopulate_section_memmap
much simpler.
Suggested-by: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Baoquan He <bhe@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
mm/sparse.c | 27 +++------------------------
1 file changed, 3 insertions(+), 24 deletions(-)
diff --git a/mm/sparse.c b/mm/sparse.c
index e747a238a860..3fa407d7f70a 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -719,35 +719,14 @@ static int fill_subsection_map(unsigned long pfn, unsigned long nr_pages)
struct page * __meminit populate_section_memmap(unsigned long pfn,
unsigned long nr_pages, int nid, struct vmem_altmap *altmap)
{
- struct page *page, *ret;
- unsigned long memmap_size = sizeof(struct page) * PAGES_PER_SECTION;
-
- page = alloc_pages(GFP_KERNEL|__GFP_NOWARN, get_order(memmap_size));
- if (page)
- goto got_map_page;
-
- ret = vmalloc(memmap_size);
- if (ret)
- goto got_map_ptr;
-
- return NULL;
-got_map_page:
- ret = (struct page *)pfn_to_kaddr(page_to_pfn(page));
-got_map_ptr:
-
- return ret;
+ return kvmalloc(array_size(sizeof(struct page),
+ PAGES_PER_SECTION), GFP_KERNEL);
}
static void depopulate_section_memmap(unsigned long pfn, unsigned long nr_pages,
struct vmem_altmap *altmap)
{
- struct page *memmap = pfn_to_page(pfn);
-
- if (is_vmalloc_addr(memmap))
- vfree(memmap);
- else
- free_pages((unsigned long)memmap,
- get_order(sizeof(struct page) * PAGES_PER_SECTION));
+ kvfree(pfn_to_page(pfn));
}
static void free_map_bootmem(struct page *memmap)
--
2.17.2
next prev parent reply other threads:[~2020-03-16 12:55 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-16 10:21 [PATCH v4 1/2] mm/sparse.c: Use kvmalloc/kvfree to alloc/free memmap for the classic sparse Baoquan He
2020-03-16 10:21 ` [PATCH v4 2/2] mm/sparse.c: allocate memmap preferring the given node Baoquan He
2020-03-16 12:56 ` [PATCH v5 " Baoquan He
2020-03-16 16:28 ` Pankaj Gupta
2020-03-16 16:29 ` David Hildenbrand
2020-03-16 22:16 ` Wei Yang
2020-03-24 1:07 ` Baoquan He
2020-03-16 11:00 ` [PATCH v4 1/2] mm/sparse.c: Use kvmalloc/kvfree to alloc/free memmap for the classic sparse David Hildenbrand
2020-03-16 12:40 ` Baoquan He
2020-03-16 11:17 ` Pankaj Gupta
2020-03-16 12:18 ` Matthew Wilcox
2020-03-16 12:54 ` Baoquan He [this message]
2020-03-16 22:16 ` [PATCH v5 " Wei Yang
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