From 8c56e03d2e08d83776c89e4b6563ca8cfdf7da54 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@redhat.com>
Date: Fri, 22 Oct 2021 17:03:02 +0200
Subject: [PATCH] fuse: don't bump attr_version in cached write
The attribute version in fuse_inode should be updated whenever the
attributes might have changed on the server. In case of cached writes this
is not the case, so updating the attr_version is unnecessary and could
possibly affect performance.
Open code the remaining part of fuse_write_update_size().
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
---
fs/fuse/file.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 06967d8e27428..c09ab835821a2 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -2309,15 +2309,18 @@ static int fuse_write_end(struct file *file, struct address_space *mapping,
if (!copied)
goto unlock;
+ pos += copied;
if (!PageUptodate(page)) {
/* Zero any unwritten bytes at the end of the page */
- size_t endoff = (pos + copied) & ~PAGE_MASK;
+ size_t endoff = pos & ~PAGE_MASK;
if (endoff)
zero_user_segment(page, endoff, PAGE_SIZE);
SetPageUptodate(page);
}
- fuse_write_update_size(inode, pos + copied);
+ if (pos > inode->i_size)
+ i_size_write(inode, pos);
+
set_page_dirty(page);
unlock: