linux-kernel - Re: [PATCH v8] bio: limit bio max size

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Date:   Thu, 22 Apr 2021 08:51:24 +0900
From:   Changheun Lee <nanich.lee@...sung.com>
To:     bvanassche@....org
Cc:     Johannes.Thumshirn@....com, asml.silence@...il.com,
        axboe@...nel.dk, damien.lemoal@....com, gregkh@...uxfoundation.org,
        hch@...radead.org, jisoo2146.oh@...sung.com,
        junho89.kim@...sung.com, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, ming.lei@...hat.com,
        mj0123.lee@...sung.com, nanich.lee@...sung.com, osandov@...com,
        patchwork-bot@...nel.org, seunghwan.hyun@...sung.com,
        sookwan7.kim@...sung.com, tj@...nel.org, tom.leiming@...il.com,
        woosung2.lee@...sung.com, yt0928.kim@...sung.com
Subject: Re: [PATCH v8] bio: limit bio max size

> On 4/21/21 2:47 AM, Changheun Lee wrote:
> > bio size can grow up to 4GB when muli-page bvec is enabled.
> > but sometimes it would lead to inefficient behaviors.
> > in case of large chunk direct I/O, - 32MB chunk read in user space -
> 
> This patch looks good to me, hence:
> 
> Reviewed-by: Bart Van Assche <bvanassche@....org>
> 
> Do you plan to submit a dm-crypt patch that limits the bio size when 
> using dm-crypt to the bio size of the underling device?
> 
> Thanks,
> 
> Bart.

Yes, I'm preparing a dm-crypt patch. I'll upstream after applying of this.
Thank you for your review, and advice. :)

Thanks,

Changheun Lee.