mirror of
https://github.com/torvalds/linux.git
synced 2024-11-22 04:38:03 +00:00
6d4e2cda62
Patch series "Some bugfix about kmemleak", v3.
Some bugfixes for kmemleak and the printed info from debug mode.
This patch (of 7):
Since kmemleak_alloc_phys() rather than kmemleak_alloc() was called from
memblock_alloc_range_nid(), kmemleak_free_part_phys() should be used to
delete kmemleak object in put_page_bootmem(). In debug mode, there are
following warning:
kmemleak: Partially freeing unknown object at 0xffff97345aff7000 (size 4096)
Link: https://lkml.kernel.org/r/20231018102952.3339837-1-liushixin2@huawei.com
Link: https://lkml.kernel.org/r/20231018102952.3339837-2-liushixin2@huawei.com
Fixes: dd0ff4d12d ("bootmem: remove the vmemmap pages from kmemleak in put_page_bootmem")
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Patrick Wang <patrick.wang.shcn@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
129 lines
3.4 KiB
C
129 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Bootmem core functions.
|
|
*
|
|
* Copyright (c) 2020, Bytedance.
|
|
*
|
|
* Author: Muchun Song <songmuchun@bytedance.com>
|
|
*
|
|
*/
|
|
#include <linux/mm.h>
|
|
#include <linux/compiler.h>
|
|
#include <linux/memblock.h>
|
|
#include <linux/bootmem_info.h>
|
|
#include <linux/memory_hotplug.h>
|
|
#include <linux/kmemleak.h>
|
|
|
|
void get_page_bootmem(unsigned long info, struct page *page, unsigned long type)
|
|
{
|
|
page->index = type;
|
|
SetPagePrivate(page);
|
|
set_page_private(page, info);
|
|
page_ref_inc(page);
|
|
}
|
|
|
|
void put_page_bootmem(struct page *page)
|
|
{
|
|
unsigned long type = page->index;
|
|
|
|
BUG_ON(type < MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE ||
|
|
type > MEMORY_HOTPLUG_MAX_BOOTMEM_TYPE);
|
|
|
|
if (page_ref_dec_return(page) == 1) {
|
|
page->index = 0;
|
|
ClearPagePrivate(page);
|
|
set_page_private(page, 0);
|
|
INIT_LIST_HEAD(&page->lru);
|
|
kmemleak_free_part_phys(PFN_PHYS(page_to_pfn(page)), PAGE_SIZE);
|
|
free_reserved_page(page);
|
|
}
|
|
}
|
|
|
|
#ifndef CONFIG_SPARSEMEM_VMEMMAP
|
|
static void __init register_page_bootmem_info_section(unsigned long start_pfn)
|
|
{
|
|
unsigned long mapsize, section_nr, i;
|
|
struct mem_section *ms;
|
|
struct page *page, *memmap;
|
|
struct mem_section_usage *usage;
|
|
|
|
section_nr = pfn_to_section_nr(start_pfn);
|
|
ms = __nr_to_section(section_nr);
|
|
|
|
/* Get section's memmap address */
|
|
memmap = sparse_decode_mem_map(ms->section_mem_map, section_nr);
|
|
|
|
/*
|
|
* Get page for the memmap's phys address
|
|
* XXX: need more consideration for sparse_vmemmap...
|
|
*/
|
|
page = virt_to_page(memmap);
|
|
mapsize = sizeof(struct page) * PAGES_PER_SECTION;
|
|
mapsize = PAGE_ALIGN(mapsize) >> PAGE_SHIFT;
|
|
|
|
/* remember memmap's page */
|
|
for (i = 0; i < mapsize; i++, page++)
|
|
get_page_bootmem(section_nr, page, SECTION_INFO);
|
|
|
|
usage = ms->usage;
|
|
page = virt_to_page(usage);
|
|
|
|
mapsize = PAGE_ALIGN(mem_section_usage_size()) >> PAGE_SHIFT;
|
|
|
|
for (i = 0; i < mapsize; i++, page++)
|
|
get_page_bootmem(section_nr, page, MIX_SECTION_INFO);
|
|
|
|
}
|
|
#else /* CONFIG_SPARSEMEM_VMEMMAP */
|
|
static void __init register_page_bootmem_info_section(unsigned long start_pfn)
|
|
{
|
|
unsigned long mapsize, section_nr, i;
|
|
struct mem_section *ms;
|
|
struct page *page, *memmap;
|
|
struct mem_section_usage *usage;
|
|
|
|
section_nr = pfn_to_section_nr(start_pfn);
|
|
ms = __nr_to_section(section_nr);
|
|
|
|
memmap = sparse_decode_mem_map(ms->section_mem_map, section_nr);
|
|
|
|
register_page_bootmem_memmap(section_nr, memmap, PAGES_PER_SECTION);
|
|
|
|
usage = ms->usage;
|
|
page = virt_to_page(usage);
|
|
|
|
mapsize = PAGE_ALIGN(mem_section_usage_size()) >> PAGE_SHIFT;
|
|
|
|
for (i = 0; i < mapsize; i++, page++)
|
|
get_page_bootmem(section_nr, page, MIX_SECTION_INFO);
|
|
}
|
|
#endif /* !CONFIG_SPARSEMEM_VMEMMAP */
|
|
|
|
void __init register_page_bootmem_info_node(struct pglist_data *pgdat)
|
|
{
|
|
unsigned long i, pfn, end_pfn, nr_pages;
|
|
int node = pgdat->node_id;
|
|
struct page *page;
|
|
|
|
nr_pages = PAGE_ALIGN(sizeof(struct pglist_data)) >> PAGE_SHIFT;
|
|
page = virt_to_page(pgdat);
|
|
|
|
for (i = 0; i < nr_pages; i++, page++)
|
|
get_page_bootmem(node, page, NODE_INFO);
|
|
|
|
pfn = pgdat->node_start_pfn;
|
|
end_pfn = pgdat_end_pfn(pgdat);
|
|
|
|
/* register section info */
|
|
for (; pfn < end_pfn; pfn += PAGES_PER_SECTION) {
|
|
/*
|
|
* Some platforms can assign the same pfn to multiple nodes - on
|
|
* node0 as well as nodeN. To avoid registering a pfn against
|
|
* multiple nodes we check that this pfn does not already
|
|
* reside in some other nodes.
|
|
*/
|
|
if (pfn_valid(pfn) && (early_pfn_to_nid(pfn) == node))
|
|
register_page_bootmem_info_section(pfn);
|
|
}
|
|
}
|