Re: [PATCH] f2fs: assign REQ_RAHEAD to bio for ->readpages

[Chao Yu <yuchao0@huawei.com>]

On 2018/6/22 3:32, Jaegeuk Kim wrote:
> As Jens reported, we'd better assign REQ_RAHEAD to bio by the fact that
> ->readpages is called only from read-ahead.
> 
> In Documentation/filesystems/vfs.txt,
> 
> readpages: called by the VM to read pages associated with the address_space
>   	object. This is essentially just a vector version of
>   	readpage.  Instead of just one page, several pages are
>   	requested.
> 	readpages is only used for read-ahead, so read errors are
>   	ignored.  If anything goes wrong, feel free to give up.
> 
> Signed-off-by: Jens Axboe <axboe@kernel.dk>
> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

Reviewed-by: Chao Yu <yuchao0@huawei.com>

Thanks,