From: Christoph Hellwig <hch@lst.de>
To: Keith Busch <kbusch@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>,
Christoph Hellwig <hch@infradead.org>,
Keith Busch <kbusch@meta.com>,
linux-block@vger.kernel.org, linux-nvme@lists.infradead.org,
axboe@kernel.dk, iommu@lists.linux.dev
Subject: Re: [PATCHv3 1/2] block: accumulate segment page gaps per bio
Date: Tue, 26 Aug 2025 15:57:34 +0200 [thread overview]
Message-ID: <20250826135734.GA4532@lst.de> (raw)
In-Reply-To: <aK27AhpcQOWADLO8@kbusch-mbp>
On Tue, Aug 26, 2025 at 07:47:46AM -0600, Keith Busch wrote:
> Currently, the virtual boundary is always compared to bv_offset, which
> is a page offset. If the virtual boundary is larger than a page, then we
> need something like "page_to_phys(bv.bv_page) + bv.bv_offset" every
> place we need to check against the virt boundary.
bv_offset is only guaranteed to be a page offset if your use
bio_for_each_segment(_all) or the low-level helpers implementing
it and not bio_for_each_bvec(_all) where it can be much larger
than PAGE_SIZE.
next prev parent reply other threads:[~2025-08-26 14:26 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-21 20:44 [PATCHv3 0/2] block+nvme: reducing virtual boundary mask reliance Keith Busch
2025-08-21 20:44 ` [PATCHv3 1/2] block: accumulate segment page gaps per bio Keith Busch
2025-08-25 13:46 ` Christoph Hellwig
2025-08-25 14:10 ` Keith Busch
2025-08-26 13:03 ` Christoph Hellwig
2025-08-26 13:47 ` Keith Busch
2025-08-26 13:57 ` Christoph Hellwig [this message]
2025-08-26 22:33 ` Keith Busch
2025-08-27 7:37 ` Christoph Hellwig
2025-08-30 1:47 ` Keith Busch
2025-09-02 5:36 ` Christoph Hellwig
2025-08-21 20:44 ` [PATCHv3 2/2] nvme: remove virtual boundary for sgl capable devices Keith Busch
2025-08-25 13:49 ` Christoph Hellwig
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