From: Muchun Song <songmuchun@bytedance.com>
To: corbet@lwn.net, mike.kravetz@oracle.com, tglx@linutronix.de,
mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com,
dave.hansen@linux.intel.com, luto@kernel.org,
peterz@infradead.org, viro@zeniv.linux.org.uk,
akpm@linux-foundation.org, paulmck@kernel.org,
mchehab+huawei@kernel.org, pawan.kumar.gupta@linux.intel.com,
rdunlap@infradead.org, oneukum@suse.com,
anshuman.khandual@arm.com, jroedel@suse.de,
almasrymina@google.com, rientjes@google.com, willy@infradead.org,
osalvador@suse.de, mhocko@suse.com
Cc: duanxiongchun@bytedance.com, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-fsdevel@vger.kernel.org,
Muchun Song <songmuchun@bytedance.com>
Subject: [PATCH v4 06/21] mm/bootmem_info: Introduce {free,prepare}_vmemmap_page()
Date: Fri, 13 Nov 2020 18:59:37 +0800 [thread overview]
Message-ID: <20201113105952.11638-7-songmuchun@bytedance.com> (raw)
In-Reply-To: <20201113105952.11638-1-songmuchun@bytedance.com>
In the later patch, we can use the free_vmemmap_page() to free the
unused vmemmap pages and initialize a page for vmemmap page using
via prepare_vmemmap_page().
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
---
include/linux/bootmem_info.h | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/include/linux/bootmem_info.h b/include/linux/bootmem_info.h
index 4ed6dee1adc9..239e3cc8f86c 100644
--- a/include/linux/bootmem_info.h
+++ b/include/linux/bootmem_info.h
@@ -3,6 +3,7 @@
#define __LINUX_BOOTMEM_INFO_H
#include <linux/mmzone.h>
+#include <linux/mm.h>
/*
* Types for free bootmem stored in page->lru.next. These have to be in
@@ -22,6 +23,29 @@ void __init register_page_bootmem_info_node(struct pglist_data *pgdat);
void get_page_bootmem(unsigned long info, struct page *page,
unsigned long type);
void put_page_bootmem(struct page *page);
+
+static inline void free_vmemmap_page(struct page *page)
+{
+ VM_WARN_ON(!PageReserved(page) || page_ref_count(page) != 2);
+
+ /* bootmem page has reserved flag in the reserve_bootmem_region */
+ if (PageReserved(page)) {
+ unsigned long magic = (unsigned long)page->freelist;
+
+ if (magic == SECTION_INFO || magic == MIX_SECTION_INFO)
+ put_page_bootmem(page);
+ else
+ WARN_ON(1);
+ }
+}
+
+static inline void prepare_vmemmap_page(struct page *page)
+{
+ unsigned long section_nr = pfn_to_section_nr(page_to_pfn(page));
+
+ get_page_bootmem(section_nr, page, SECTION_INFO);
+ mark_page_reserved(page);
+}
#else
static inline void register_page_bootmem_info_node(struct pglist_data *pgdat)
{
--
2.11.0
next prev parent reply other threads:[~2020-11-13 11:02 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-13 10:59 [PATCH v4 00/21] Free some vmemmap pages of hugetlb page Muchun Song
2020-11-13 10:59 ` [PATCH v4 01/21] mm/memory_hotplug: Move bootmem info registration API to bootmem_info.c Muchun Song
2020-11-16 13:50 ` Oscar Salvador
2020-11-13 10:59 ` [PATCH v4 02/21] mm/memory_hotplug: Move {get,put}_page_bootmem() " Muchun Song
2020-11-16 13:52 ` Oscar Salvador
2020-11-13 10:59 ` [PATCH v4 03/21] mm/hugetlb: Introduce a new config HUGETLB_PAGE_FREE_VMEMMAP Muchun Song
2020-11-18 22:38 ` Mike Kravetz
2020-11-19 2:57 ` [External] " Muchun Song
2020-11-13 10:59 ` [PATCH v4 04/21] mm/hugetlb: Introduce nr_free_vmemmap_pages in the struct hstate Muchun Song
2020-11-16 13:33 ` Oscar Salvador
2020-11-16 15:40 ` [External] " Muchun Song
2020-11-18 22:54 ` Mike Kravetz
2020-11-18 23:48 ` Mike Kravetz
2020-11-19 3:00 ` [External] " Muchun Song
2020-11-13 10:59 ` [PATCH v4 05/21] mm/hugetlb: Introduce pgtable allocation/freeing helpers Muchun Song
2020-11-17 15:06 ` Oscar Salvador
2020-11-17 15:29 ` [External] " Muchun Song
2020-11-19 6:17 ` Muchun Song
2020-11-19 23:21 ` Mike Kravetz
2020-11-20 2:52 ` Muchun Song
2020-11-19 23:37 ` Mike Kravetz
2020-11-13 10:59 ` Muchun Song [this message]
2020-11-13 10:59 ` [PATCH v4 07/21] mm/bootmem_info: Combine bootmem info and type into page->freelist Muchun Song
2020-11-13 10:59 ` [PATCH v4 08/21] mm/hugetlb: Initialize page table lock for vmemmap Muchun Song
2020-11-13 10:59 ` [PATCH v4 09/21] mm/hugetlb: Free the vmemmap pages associated with each hugetlb page Muchun Song
2020-11-17 9:54 ` Song Bao Hua (Barry Song)
2020-11-17 10:26 ` [External] " Muchun Song
2020-11-18 3:21 ` Song Bao Hua (Barry Song)
2020-11-13 10:59 ` [PATCH v4 10/21] mm/hugetlb: Defer freeing of hugetlb pages Muchun Song
2020-11-13 10:59 ` [PATCH v4 11/21] mm/hugetlb: Allocate the vmemmap pages associated with each hugetlb page Muchun Song
2020-11-13 10:59 ` [PATCH v4 12/21] mm/hugetlb: Introduce remap_huge_page_pmd_vmemmap helper Muchun Song
2020-11-13 10:59 ` [PATCH v4 13/21] mm/hugetlb: Use PG_slab to indicate split pmd Muchun Song
2020-11-13 10:59 ` [PATCH v4 14/21] mm/hugetlb: Support freeing vmemmap pages of gigantic page Muchun Song
2020-11-13 10:59 ` [PATCH v4 15/21] mm/hugetlb: Set the PageHWPoison to the raw error page Muchun Song
2020-11-13 10:59 ` [PATCH v4 16/21] mm/hugetlb: Flush work when dissolving hugetlb page Muchun Song
2020-11-13 10:59 ` [PATCH v4 17/21] mm/hugetlb: Add a kernel parameter hugetlb_free_vmemmap Muchun Song
2020-11-13 10:59 ` [PATCH v4 18/21] mm/hugetlb: Merge pte to huge pmd only for gigantic page Muchun Song
2020-11-13 10:59 ` [PATCH v4 19/21] mm/hugetlb: Gather discrete indexes of tail page Muchun Song
2020-11-13 10:59 ` [PATCH v4 20/21] mm/hugetlb: Add BUILD_BUG_ON to catch invalid usage of tail struct page Muchun Song
2020-11-13 10:59 ` [PATCH v4 21/21] mm/hugetlb: Disable freeing vmemmap if struct page size is not power of two Muchun Song
2020-11-17 10:15 ` [PATCH v4 00/21] Free some vmemmap pages of hugetlb page Song Bao Hua (Barry Song)
2020-11-17 10:49 ` [External] " Muchun Song
2020-11-17 11:07 ` Song Bao Hua (Barry Song)
2020-11-17 16:29 ` Muchun Song
2020-11-17 19:22 ` Matthew Wilcox
2020-11-18 2:43 ` Muchun Song
2020-11-17 19:45 ` Oscar Salvador
2020-11-18 3:27 ` Muchun Song
2020-11-18 3:27 ` Song Bao Hua (Barry Song)
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