diff options
| author | Gao Xiang <hsiangkao@redhat.com> | 2020-12-08 17:58:32 +0800 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@redhat.com> | 2020-12-08 18:08:21 +0800 |
| commit | 6aaa7b0664e6886f6154070edbc24435d6e1f86b (patch) | |
| tree | e071fea60039165f7eacf8b8780979811b0f80bc /fs/erofs/zdata.h | |
| parent | a426ce9d6751cc8e709f031fa546900e4239f125 (diff) | |
| download | lwn-6aaa7b0664e6886f6154070edbc24435d6e1f86b.tar.gz lwn-6aaa7b0664e6886f6154070edbc24435d6e1f86b.zip | |
erofs: get rid of magical Z_EROFS_MAPPING_STAGING
Previously, we played around with magical page->mapping for short-lived
temporary pages since we need to identify different types of pages in
the same pcluster but both invalidated and short-lived temporary pages
can have page->mapping == NULL. It was considered as safe because that
temporary pages are all non-LRU / non-movable pages.
This patch tends to use specific page->private to identify short-lived
pages instead so it won't rely on page->mapping anymore. Details are
described in "compress.h" as well.
Link: https://lore.kernel.org/r/20201208095834.3133565-1-hsiangkao@redhat.com
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Gao Xiang <hsiangkao@redhat.com>
Diffstat (limited to 'fs/erofs/zdata.h')
| -rw-r--r-- | fs/erofs/zdata.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/erofs/zdata.h b/fs/erofs/zdata.h index 68c9b29fc0ca..b503b353d4ab 100644 --- a/fs/erofs/zdata.h +++ b/fs/erofs/zdata.h @@ -173,6 +173,7 @@ static inline void z_erofs_onlinepage_endio(struct page *page) v = atomic_dec_return(u.o); if (!(v & Z_EROFS_ONLINEPAGE_COUNT_MASK)) { + set_page_private(page, 0); ClearPagePrivate(page); if (!PageError(page)) SetPageUptodate(page); |