Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2025-01-08 15:04:45 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

mm/hugetlb: convert hugetlbfs_pagecache_present() to folios

Browse Source 
Refactor hugetlbfs_pagecache_present() to avoid getting and dropping a
refcount on a page.  Use RCU and page_cache_next_miss() instead.

Link: https://lkml.kernel.org/r/20230125170537.96973-3-sidhartha.kumar@oracle.com
Suggested-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: kernel test robot <lkp@intel.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Sidhartha Kumar 2023-01-25 09:05:31 -08:00 committed by Andrew Morton
parent ea4c353df3
commit 91a2fb956a
1 changed files with 7 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
mm/hugetlb.c
View File

@ -5651,17 +5651,15 @@ static vm_fault_t hugetlb_wp(struct mm_struct *mm, struct vm_area_struct *vma,
static bool hugetlbfs_pagecache_present(struct hstate *h,
struct vm_area_struct *vma, unsigned long address)
{
struct address_space *mapping;
pgoff_t idx;
struct page *page;
struct address_space *mapping = vma->vm_file->f_mapping;
pgoff_t idx = vma_hugecache_offset(h, vma, address);
bool present;
mapping = vma->vm_file->f_mapping;
idx = vma_hugecache_offset(h, vma, address);
rcu_read_lock();
present = page_cache_next_miss(mapping, idx, 1) != idx;
rcu_read_unlock();
page = find_get_page(mapping, idx);
if (page)
put_page(page);
return page != NULL;
return present;
}
int hugetlb_add_to_page_cache(struct page *page, struct address_space *mapping,