linux-ext4 - Re: [PATCH] ext4: start to support iopoll method

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Message-ID: <c535d8f5-e746-30dc-f3e8-aeed04fcb5b8@linux.alibaba.com>
Date:   Mon, 2 Mar 2020 17:17:09 +0800
From:   Xiaoguang Wang <xiaoguang.wang@...ux.alibaba.com>
To:     linux-ext4@...r.kernel.org
Cc:     tytso@....edu, jack@...e.cz,
        joseph qi <joseph.qi@...ux.alibaba.com>
Subject: Re: [PATCH] ext4: start to support iopoll method

hi,

Ted, could you please consider applying this patch? Iouring polling
tests in ext4 needs this patch, Jan Kara has nicely reviewed this patch, thanks.

Regards,
Xiaoguang Wang

> Since commit "b1b4705d54ab ext4: introduce direct I/O read using
> iomap infrastructure", we can easily make ext4 support iopoll
> method, just use iomap_dio_iopoll().
> 
> Signed-off-by: Xiaoguang Wang <xiaoguang.wang@...ux.alibaba.com>
> ---
>   fs/ext4/file.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/fs/ext4/file.c b/fs/ext4/file.c
> index 5f225881176b..0d624250a62b 100644
> --- a/fs/ext4/file.c
> +++ b/fs/ext4/file.c
> @@ -872,6 +872,7 @@ const struct file_operations ext4_file_operations = {
>   	.llseek		= ext4_llseek,
>   	.read_iter	= ext4_file_read_iter,
>   	.write_iter	= ext4_file_write_iter,
> +	.iopoll		= iomap_dio_iopoll,
>   	.unlocked_ioctl = ext4_ioctl,
>   #ifdef CONFIG_COMPAT
>   	.compat_ioctl	= ext4_compat_ioctl,
>