3.16.66-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Miklos Szeredi <mszeredi@xxxxxxxxxx>
commit a2ebba824106dabe79937a9f29a875f837e1b6d4 upstream.
NR_WRITEBACK_TEMP is accounted on the temporary page in the request, not
the page cache page.
Fixes: 8b284dc47291 ("fuse: writepages: handle same page rewrites")
Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxxxxx>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
fs/fuse/file.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1846,7 +1846,7 @@ static bool fuse_writepage_in_flight(str
spin_unlock(&fc->lock);
dec_bdi_stat(bdi, BDI_WRITEBACK);
- dec_zone_page_state(page, NR_WRITEBACK_TEMP);
+ dec_zone_page_state(new_req->pages[0], NR_WRITEBACK_TEMP);
bdi_writeout_inc(bdi);
fuse_writepage_free(fc, new_req);
fuse_request_free(new_req);
