fs/erofs/data.c | 29 ++++++++++++----------------- 1 file changed, 12 insertions(+), 17 deletions(-)
If the requested page is part of the previous multi-page folio, there
is no need to call read_mapping_folio() again.
Also, get rid of the remaining one of page->index [1] in our codebase.
[1] https://lore.kernel.org/r/Zp8fgUSIBGQ1TN0D@casper.infradead.org
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
---
(I plan to test now and take this for this cycle since this patch is
not quite complex.)
fs/erofs/data.c | 29 ++++++++++++-----------------
1 file changed, 12 insertions(+), 17 deletions(-)
diff --git a/fs/erofs/data.c b/fs/erofs/data.c
index 8be60797ea2f..4b8b2b004453 100644
--- a/fs/erofs/data.c
+++ b/fs/erofs/data.c
@@ -21,38 +21,33 @@ void erofs_put_metabuf(struct erofs_buf *buf)
if (!buf->page)
return;
erofs_unmap_metabuf(buf);
- put_page(buf->page);
+ folio_put(page_folio(buf->page));
buf->page = NULL;
}
-/*
- * Derive the block size from inode->i_blkbits to make compatible with
- * anonymous inode in fscache mode.
- */
void *erofs_bread(struct erofs_buf *buf, erofs_off_t offset,
enum erofs_kmap_type type)
{
pgoff_t index = offset >> PAGE_SHIFT;
- struct page *page = buf->page;
- struct folio *folio;
- unsigned int nofs_flag;
+ struct folio *folio = NULL;
- if (!page || page->index != index) {
+ if (buf->page) {
+ folio = page_folio(buf->page);
+ if (folio_file_page(folio, index) != buf->page)
+ erofs_unmap_metabuf(buf);
+ }
+ if (!folio || !folio_contains(folio, index)) {
erofs_put_metabuf(buf);
- nofs_flag = memalloc_nofs_save();
- folio = read_cache_folio(buf->mapping, index, NULL, NULL);
- memalloc_nofs_restore(nofs_flag);
+ folio = read_mapping_folio(buf->mapping, index, NULL);
if (IS_ERR(folio))
return folio;
-
- /* should already be PageUptodate, no need to lock page */
- page = folio_file_page(folio, index);
- buf->page = page;
}
+ buf->page = folio_file_page(folio, index);
+
if (buf->kmap_type == EROFS_NO_KMAP) {
if (type == EROFS_KMAP)
- buf->base = kmap_local_page(page);
+ buf->base = kmap_local_page(buf->page);
buf->kmap_type = type;
} else if (buf->kmap_type != type) {
DBG_BUGON(1);
--
2.43.5
On 2024/7/23 15:30, Gao Xiang wrote: > If the requested page is part of the previous multi-page folio, there > is no need to call read_mapping_folio() again. > > Also, get rid of the remaining one of page->index [1] in our codebase. > > [1] https://lore.kernel.org/r/Zp8fgUSIBGQ1TN0D@casper.infradead.org > Cc: Matthew Wilcox <willy@infradead.org> > Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com> Reviewed-by: Chao Yu <chao@kernel.org> Thanks,
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