linux-kernel - Re: [PATCH v3] block, scsi: sd_zbc: Respect bio vector limits for report zones buffer

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Message-ID: <8d605e7b-e4f7-48eb-ad06-0e8a87b620b5@kernel.org>
Date: Fri, 9 May 2025 08:08:12 +0900
From: Damien Le Moal <dlemoal@...nel.org>
To: Steve Siwinski <stevensiwinski@...il.com>
Cc: James.Bottomley@...senpartnership.com, axboe@...nel.dk, bgrove@...o.com,
 hch@...radead.org, linux-block@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
 martin.petersen@...cle.com, ssiwinski@...o.com, tdoedline@...o.com,
 stable@...r.kernel.org
Subject: Re: [PATCH v3] block, scsi: sd_zbc: Respect bio vector limits for
 report zones buffer

On 5/9/25 5:01 AM, Steve Siwinski wrote:
> The report zones buffer size is currently limited by the HBA's
> maximum segment count to ensure the buffer can be mapped. However,
> the block layer further limits the number of iovec entries to
> 1024 when allocating a bio.
> 
> To avoid allocation of buffers too large to be mapped, further
> restrict the maximum buffer size to BIO_MAX_INLINE_VECS.
> 
> Replace the UIO_MAXIOV symbolic name with the more contextually
> appropriate BIO_MAX_INLINE_VECS.
> 
> Fixes: b091ac616846 ("sd_zbc: Fix report zones buffer allocation")
> Cc: stable@...r.kernel.org
> Signed-off-by: Steve Siwinski <ssiwinski@...o.com>

Looks good to me.

Reviewed-by: Damien Le Moal <dlemoal@...nel.org>

-- 
Damien Le Moal
Western Digital Research