From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Subject: Re: [PATCH 2/2] f2fs: add REQ_META about metadata requests for submit
 bio
Date: Mon, 22 Apr 2013 11:49:26 +0900
Message-ID: <1366598966.31792.1.camel@kjgkr>
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Cc: linux-f2fs-devel@lists.sourceforge.net,
	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	Namjae Jeon <namjae.jeon@samsung.com>,
	Amit Sahrawat <a.sahrawat@samsung.com>
To: Namjae Jeon <linkinjeon@gmail.com>
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2013-04-20 (=ED=86=A0), 01:27 +0900, Namjae Jeon:
> From: Namjae Jeon <namjae.jeon@samsung.com>
>=20
> Adding REQ_META for all the metadata requests can help in improving the
> FS performance, if the underlying device supports TAGGING.
> So, when considering the submit_bio path for all the f2fs requests. We ca=
n
> add REQ_META for all the META requests.
> As a precursor to this change we considered the commit
> 4265900e0be653f5b78baf2816857ef57cf1332f 'mmc: MMC-4.5 Data Tag Support'
>=20
> Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
> Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
> ---
>  fs/f2fs/segment.c |    3 +++
>  1 file changed, 3 insertions(+)
>=20
> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> index 1193a26..a2e5de7 100644
> --- a/fs/f2fs/segment.c
> +++ b/fs/f2fs/segment.c
> @@ -689,6 +689,9 @@ static void do_submit_bio(struct f2fs_sb_info *sbi,
>  	if (type >=3D META_FLUSH)
>  		rw =3D WRITE_FLUSH_FUA;
> =20
> +	if (type =3D=3D META)

Should be if (btype =3D=3D META).
Thanks,

> +		rw |=3D REQ_META;
> +
>  	if (sbi->bio[btype]) {
>  		struct bio_private *p =3D sbi->bio[btype]->bi_private;
>  		trace_f2fs_do_submit_bio(sbi->sb, btype, sync,

--=20
Jaegeuk Kim
Samsung

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