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filemap: Convert do_async_mmap_readahead to take a folio

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Call page_cache_async_ra() directly instead of indirecting through
page_cache_async_readahead().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
This commit is contained in:
Matthew Wilcox (Oracle) 2021-07-29 14:57:01 -04:00
parent 0387df1d1f
commit 79598cedad
1 changed files with 8 additions and 7 deletions
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15
mm/filemap.c
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@ -3001,25 +3001,25 @@ static struct file *do_sync_mmap_readahead(struct vm_fault *vmf)
* was pinned if we have to drop the mmap_lock in order to do IO.
*/
static struct file *do_async_mmap_readahead(struct vm_fault *vmf,
struct page *page)
struct folio *folio)
{
struct file *file = vmf->vma->vm_file;
struct file_ra_state *ra = &file->f_ra;
struct address_space *mapping = file->f_mapping;
DEFINE_READAHEAD(ractl, file, ra, file->f_mapping, vmf->pgoff);
struct file *fpin = NULL;
unsigned int mmap_miss;
pgoff_t offset = vmf->pgoff;
/* If we don't want any read-ahead, don't bother */
if (vmf->vma->vm_flags & VM_RAND_READ || !ra->ra_pages)
return fpin;
mmap_miss = READ_ONCE(ra->mmap_miss);
if (mmap_miss)
WRITE_ONCE(ra->mmap_miss, --mmap_miss);
if (PageReadahead(page)) {
if (folio_test_readahead(folio)) {
fpin = maybe_unlock_mmap_for_io(vmf, fpin);
page_cache_async_readahead(mapping, ra, file,
page, offset, ra->ra_pages);
page_cache_async_ra(&ractl, folio, ra->ra_pages);
}
return fpin;
}
@ -3069,12 +3069,13 @@ vm_fault_t filemap_fault(struct vm_fault *vmf)
*/
page = find_get_page(mapping, offset);
if (likely(page)) {
struct folio *folio = page_folio(page);
/*
* We found the page, so try async readahead before waiting for
* the lock.
*/
if (!(vmf->flags & FAULT_FLAG_TRIED))
fpin = do_async_mmap_readahead(vmf, page);
fpin = do_async_mmap_readahead(vmf, folio);
if (unlikely(!PageUptodate(page))) {
filemap_invalidate_lock_shared(mapping);
mapping_locked = true;