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fs: hugetlbfs: set vma policy only when needed for allocating folio 

Calling hugetlb_set_vma_policy() later avoids setting the vma policy
and then dropping it on a page cache hit.

Link: https://lkml.kernel.org/r/20230502235622.3652586-1-ackerleytng@google.com
Signed-off-by: Ackerley Tng <ackerleytng@google.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Erdem Aktas <erdemaktas@google.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Vishal Annapurve <vannapurve@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Ackerley Tng 2023-05-02 23:56:22 +00:00 committed by Andrew Morton
parent 88537aac0b
commit adef080382
1 changed files with 1 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
fs/hugetlbfs/inode.c
View File

@ -834,9 +834,6 @@ static long hugetlbfs_fallocate(struct file *file, int mode, loff_t offset,
break;
}
/* Set numa allocation policy based on index */
hugetlb_set_vma_policy(&pseudo_vma, inode, index);
/* addr is the offset within the file (zero based) */
addr = index * hpage_size;
@ -850,7 +847,6 @@ static long hugetlbfs_fallocate(struct file *file, int mode, loff_t offset,
rcu_read_unlock();
if (present) {
mutex_unlock(&hugetlb_fault_mutex_table[hash]);
hugetlb_drop_vma_policy(&pseudo_vma);
continue;
}
@ -862,6 +858,7 @@ static long hugetlbfs_fallocate(struct file *file, int mode, loff_t offset,
* folios in these areas, we need to consume the reserves
* to keep reservation accounting consistent.
*/
hugetlb_set_vma_policy(&pseudo_vma, inode, index);
folio = alloc_hugetlb_folio(&pseudo_vma, addr, 0);
hugetlb_drop_vma_policy(&pseudo_vma);
if (IS_ERR(folio)) {