From: Yangtao Li <frank.li@vivo.com>
Date: Wed, 31 May 2023 12:59:18 +0000 (+0800)
Subject: f2fs: flag as supporting buffered async reads
X-Git-Tag: v6.5-rc1~43^2~25
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=38b57833de1d9716bf8134c6fefcc35d23d5b136;p=thirdparty%2Fkernel%2Flinux.git

f2fs: flag as supporting buffered async reads

The f2fs uses generic_file_buffered_read(), which supports buffered async
reads since commit 1a0a7853b901 ("mm: support async buffered reads in
generic_file_buffered_read()").

Let's enable it to match other file-systems. The read performance has been
greatly improved under io_uring:

    167M/s -> 234M/s, Increase ratio by 40%

Test w/:
    ./fio --name=onessd --filename=/data/test/local/io_uring_test
    --size=256M --rw=randread --bs=4k --direct=0 --overwrite=0
    --numjobs=1 --iodepth=1 --time_based=0 --runtime=10
    --ioengine=io_uring --registerfiles --fixedbufs
    --gtod_reduce=1 --group_reporting --sqthread_poll=1

Signed-off-by: Lu Hongfei <luhongfei@vivo.com>
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 015ed274dc312..23c68ee946e58 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -546,7 +546,7 @@ static int f2fs_file_open(struct inode *inode, struct file *filp)
 	if (err)
 		return err;
 
-	filp->f_mode |= FMODE_NOWAIT;
+	filp->f_mode |= FMODE_NOWAIT | FMODE_BUF_RASYNC;
 
 	return dquot_file_open(inode, filp);
 }