@@ -1050,7 +1050,8 @@ static int fuse_bdi_init(struct fuse_conn *fc, struct super_block *sb)
return err;
/* fuse does it's own writeback accounting */
- sb->s_bdi->capabilities = BDI_CAP_NO_ACCT_WB | BDI_CAP_STRICTLIMIT;
+ sb->s_bdi->capabilities &= ~BDI_CAP_WRITEBACK_ACCT;
+ sb->s_bdi->capabilities |= BDI_CAP_STRICTLIMIT;
/*
* For a single fuse filesystem use max 1% of dirty +
@@ -120,17 +120,17 @@ int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned int max_ratio);
*
* BDI_CAP_NO_ACCT_DIRTY: Dirty pages shouldn't contribute to accounting
* BDI_CAP_NO_WRITEBACK: Don't write pages back
- * BDI_CAP_NO_ACCT_WB: Don't automatically account writeback pages
+ * BDI_CAP_WRITEBACK_ACCT: Automatically account writeback pages
* BDI_CAP_STRICTLIMIT: Keep number of dirty pages below bdi threshold.
*/
#define BDI_CAP_NO_ACCT_DIRTY 0x00000001
#define BDI_CAP_NO_WRITEBACK 0x00000002
-#define BDI_CAP_NO_ACCT_WB 0x00000004
+#define BDI_CAP_WRITEBACK_ACCT 0x00000004
#define BDI_CAP_STRICTLIMIT 0x00000010
#define BDI_CAP_CGROUP_WRITEBACK 0x00000020
#define BDI_CAP_NO_ACCT_AND_WRITEBACK \
- (BDI_CAP_NO_WRITEBACK | BDI_CAP_NO_ACCT_DIRTY | BDI_CAP_NO_ACCT_WB)
+ (BDI_CAP_NO_WRITEBACK | BDI_CAP_NO_ACCT_DIRTY)
extern struct backing_dev_info noop_backing_dev_info;
@@ -179,13 +179,6 @@ static inline bool bdi_cap_account_dirty(struct backing_dev_info *bdi)
return !(bdi->capabilities & BDI_CAP_NO_ACCT_DIRTY);
}
-static inline bool bdi_cap_account_writeback(struct backing_dev_info *bdi)
-{
- /* Paranoia: BDI_CAP_NO_WRITEBACK implies BDI_CAP_NO_ACCT_WB */
- return !(bdi->capabilities & (BDI_CAP_NO_ACCT_WB |
- BDI_CAP_NO_WRITEBACK));
-}
-
static inline bool mapping_cap_writeback_dirty(struct address_space *mapping)
{
return bdi_cap_writeback_dirty(inode_to_bdi(mapping->host));
@@ -744,6 +744,7 @@ struct backing_dev_info *bdi_alloc(int node_id)
kfree(bdi);
return NULL;
}
+ bdi->capabilities = BDI_CAP_WRITEBACK_ACCT;
bdi->ra_pages = VM_READAHEAD_PAGES;
return bdi;
}
@@ -2740,7 +2740,7 @@ int test_clear_page_writeback(struct page *page)
if (ret) {
__xa_clear_mark(&mapping->i_pages, page_index(page),
PAGECACHE_TAG_WRITEBACK);
- if (bdi_cap_account_writeback(bdi)) {
+ if (bdi->capabilities & BDI_CAP_WRITEBACK_ACCT) {
struct bdi_writeback *wb = inode_to_wb(inode);
dec_wb_stat(wb, WB_WRITEBACK);
@@ -2793,7 +2793,7 @@ int __test_set_page_writeback(struct page *page, bool keep_write)
PAGECACHE_TAG_WRITEBACK);
xas_set_mark(&xas, PAGECACHE_TAG_WRITEBACK);
- if (bdi_cap_account_writeback(bdi))
+ if (bdi->capabilities & BDI_CAP_WRITEBACK_ACCT)
inc_wb_stat(inode_to_wb(inode), WB_WRITEBACK);
/*
Replace BDI_CAP_NO_ACCT_WB with a positive BDI_CAP_WRITEBACK_ACCT to make the checks more obvious. Also remove the pointless bdi_cap_account_writeback wrapper that just obsfucates the check. Signed-off-by: Christoph Hellwig <hch@lst.de> --- fs/fuse/inode.c | 3 ++- include/linux/backing-dev.h | 13 +++---------- mm/backing-dev.c | 1 + mm/page-writeback.c | 4 ++-- 4 files changed, 8 insertions(+), 13 deletions(-)