linux-kernel - Re: [PATCH v4] scsi: support packing multi-segment in UNMAP command

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Message-ID: <2205b7c0-53d5-a485-72e3-12810d8c0a42@acm.org>
Date:   Thu, 16 Jun 2022 20:50:53 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Chao Yu <chao@...nel.org>, jejb@...ux.ibm.com,
        martin.petersen@...cle.com
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        hch@...radead.org
Subject: Re: [PATCH v4] scsi: support packing multi-segment in UNMAP command

On 6/15/22 18:36, Chao Yu wrote:
> As SCSI SBC4 specification section 5.30.2 describes that it can
> support unmapping one or more LBA range in single UNMAP command.
> 
> However, previously we only pack one LBA range in UNMAP command
> by default no matter device gives the block limits that says it
> can support unmapping multiple LBA ranges with a single UNMAP
> command.
> 
> This patch sets max_discard_segments config according to block
> limits of device, and supports unmapping multiple LBA ranges with
> a single UNMAP command.

Reviewed-by: Bart Van Assche <bvanassche@....org>