linux-kernel - Re: [PATCH] scsi: ufs: ufsfbo: Introduce File Based Optimization feature

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Message-ID: <9bd8c0f6-f7d2-e5ae-fbe9-d9a9a569adaa@acm.org>
Date:   Wed, 24 Aug 2022 09:40:10 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Bean Huo <huobean@...il.com>,
        Jiaming Li <lijiamingsofine@...il.com>, avri.altman@....com,
        alim.akhtar@...sung.com, jejb@...ux.ibm.com
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        lijiaming3 <lijiaming3@...omi.com>
Subject: Re: [PATCH] scsi: ufs: ufsfbo: Introduce File Based Optimization
 feature

On 8/24/22 07:16, Bean Huo wrote:
> Is this a UFS extended standard or vendor specific feature?

Hi Bean,

This feature has been standardized by JEDEC. My feedback to the sponsors 
of this feature a few months ago was that FBO will become obsolete once 
all UFS devices support Zoned storage for UFS. The FBO standard defines 
an interface for telling UFS devices about the relationship between LBAs 
and files. This allows UFS devices to defragment files. UFS devices 
won't need that information for zoned LUNs since for zoned LUNs the host 
software will be responsible for ensuring that files occupy a contiguous 
range of LBAs.

Thanks,

Bart.