From: Christoph Hellwig <hch@lst.de>
To: Keith Busch <kbusch@meta.com>
Cc: axboe@kernel.dk, hch@lst.de, martin.petersen@oracle.com,
linux-block@vger.kernel.org, linux-nvme@lists.infradead.org,
linux-scsi@vger.kernel.org, sagi@grimberg.me,
Keith Busch <kbusch@kernel.org>
Subject: Re: [PATCHv5 4/9] blk-integrity: consider entire bio list for merging
Date: Sat, 14 Sep 2024 09:30:12 +0200 [thread overview]
Message-ID: <20240914073011.GA30261@lst.de> (raw)
In-Reply-To: <20240913182854.2445457-5-kbusch@meta.com>
On Fri, Sep 13, 2024 at 11:28:49AM -0700, Keith Busch wrote:
> From: Keith Busch <kbusch@kernel.org>
>
> If a bio is merged to a request, the entire bio list is merged, so don't
> temporarily detach it from its list when counting segments. In most
> cases, bi_next will already be NULL, so detaching is usually a no-op.
> But if the bio does have a list, the current code is miscounting the
> segments for the resulting merge.
As I explained in detail last round this is still wrong. There is
no bio list here ever.
next prev parent reply other threads:[~2024-09-14 7:30 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-13 18:28 [PATCHv5 0/9] block integrity merging and counting Keith Busch
2024-09-13 18:28 ` [PATCHv5 1/9] blk-mq: unconditional nr_integrity_segments Keith Busch
2024-09-13 18:28 ` [PATCHv5 2/9] blk-mq: set the nr_integrity_segments from bio Keith Busch
2024-09-13 18:28 ` [PATCHv5 3/9] blk-integrity: properly account for segments Keith Busch
2024-09-13 18:28 ` [PATCHv5 4/9] blk-integrity: consider entire bio list for merging Keith Busch
2024-09-14 7:30 ` Christoph Hellwig [this message]
2024-09-14 16:51 ` Keith Busch
2024-09-16 6:44 ` Christoph Hellwig
2024-09-16 8:40 ` Keith Busch
2024-09-13 18:28 ` [PATCHv5 5/9] block: provide a request helper for user integrity segments Keith Busch
2024-09-13 18:28 ` [PATCHv5 6/9] scsi: use request to get " Keith Busch
2024-09-13 18:28 ` [PATCHv5 7/9] nvme-rdma: " Keith Busch
2024-09-13 18:28 ` [PATCHv5 8/9] block: unexport blk_rq_count_integrity_sg Keith Busch
2024-09-13 18:28 ` [PATCHv5 9/9] blk-integrity: improved sg segment mapping Keith Busch
2024-09-13 18:37 ` [PATCHv5 0/9] block integrity merging and counting Jens Axboe
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