Re: [PATCH] f2fs: enable nowait async buffered writes

From: Chao Yu
Date: Tue Jun 06 2023 - 02:44:01 EST


On 2023/5/31 22:40, Yangtao Li wrote:
This adds the async buffered write support to f2fs,
the following is the relevant test data.

Yangtao,

Could you please provide detailed test command?

Thanks,


iodepth | 1 | 2 | 4 | 8 | 16 |
before(M/s) | 1012 | 1133 | 894 | 981 | 866 |
after(M/s) | 1488 | 1896 | 2081 | 2188 | 2207 |

Signed-off-by: Lu Hongfei <luhongfei@xxxxxxxx>
Signed-off-by: Yangtao Li <frank.li@xxxxxxxx>
---
fs/f2fs/file.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 23c68ee946e5..4faf2c04e325 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 | FMODE_BUF_RASYNC;
+ filp->f_mode |= FMODE_NOWAIT | FMODE_BUF_RASYNC | FMODE_BUF_WASYNC;
return dquot_file_open(inode, filp);
}
@@ -4515,9 +4515,6 @@ static ssize_t f2fs_buffered_write_iter(struct kiocb *iocb,
struct inode *inode = file_inode(file);
ssize_t ret;
- if (iocb->ki_flags & IOCB_NOWAIT)
- return -EOPNOTSUPP;
-
current->backing_dev_info = inode_to_bdi(inode);
ret = generic_perform_write(iocb, from);
current->backing_dev_info = NULL;