From a2ebba824106dabe79937a9f29a875f837e1b6d4 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@redhat.com>
Date: Wed, 16 Jan 2019 10:27:59 +0100
Subject: [PATCH] fuse: decrement NR_WRITEBACK_TEMP on the right page
Git-commit: a2ebba824106dabe79937a9f29a875f837e1b6d4
Patch-mainline: v5.0-rc6
References: bsc#1051510
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")
Cc: <stable@vger.kernel.org> # v3.13
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
fs/fuse/file.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index ffaffe18352a..a59c16bd90ac 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1782,7 +1782,7 @@ static bool fuse_writepage_in_flight(struct fuse_req *new_req,
spin_unlock(&fc->lock);
dec_wb_stat(&bdi->wb, WB_WRITEBACK);
- dec_node_page_state(page, NR_WRITEBACK_TEMP);
+ dec_node_page_state(new_req->pages[0], NR_WRITEBACK_TEMP);
wb_writeout_inc(&bdi->wb);
fuse_writepage_free(fc, new_req);
fuse_request_free(new_req);
--
2.16.4