linux-kernel - Re: [PATCH v2 12/14] block: add helper function for iteration of bip's bvec

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Message-ID: <20230512135410.GF32242@lst.de>
Date:   Fri, 12 May 2023 15:54:10 +0200
From:   "hch@....de" <hch@....de>
To:     Jinyoung CHOI <j-young.choi@...sung.com>
Cc:     "axboe@...nel.dk" <axboe@...nel.dk>,
        "kbusch@...nel.org" <kbusch@...nel.org>, "hch@....de" <hch@....de>,
        "sagi@...mberg.me" <sagi@...mberg.me>,
        "jejb@...ux.ibm.com" <jejb@...ux.ibm.com>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "johannes.thumshirn@....com" <johannes.thumshirn@....com>,
        "kch@...dia.com" <kch@...dia.com>,
        "willy@...radead.org" <willy@...radead.org>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 12/14] block: add helper function for iteration of
 bip's bvec

On Wed, May 10, 2023 at 05:59:41PM +0900, Jinyoung CHOI wrote:
> bip_for_each_vec() performs the iteration in a page unit.
> 
> Since a bio_vec of bip is composed of multi-page in the block, a macro
> that can be carried out in multi-page units has been added.

The naming here is a bit confused.  The rest of the block layers uses
_segment for the per-page iterators and _vec for the one that doesn't
break up.  I'd suggest we follow this naming scheme here.  And also
skip the extra for_each_mp_bvec level, just like we don't have that
intermediate level for bio_for_each_vec