Messages in this thread Patch in this message | | | Subject | [PATCH 2/2] fuse: Replace page without copying in fuse_writepage_in_flight() | From | Kirill Tkhai <> | Date | Mon, 26 Nov 2018 12:46:20 +0300 |
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It looks like we can optimize old_req page replacement and avoid copying by simple updating the request's page.
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> --- 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 c6650c68b31a..83b54b082c86 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -1778,7 +1778,7 @@ static bool fuse_writepage_in_flight(struct fuse_req *new_req, if (old_req->num_pages == 1 && old_req != first_req) { struct backing_dev_info *bdi = inode_to_bdi(page->mapping->host); - copy_highpage(old_req->pages[0], page); + swap(old_req->pages[0], page); spin_unlock(&fc->lock); dec_wb_stat(&bdi->wb, WB_WRITEBACK);
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