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From: Bart Van Assche <bvanassche@acm.org>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
	Damien Le Moal <dlemoal@kernel.org>,
	Bart Van Assche <bvanassche@acm.org>
Subject: [PATCH 0/2] Enable testing small DMA segment sizes
Date: Mon, 23 Mar 2026 13:29:00 -0700	[thread overview]
Message-ID: <20260323202904.1248169-1-bvanassche@acm.org> (raw)

Hi Jens,

About one year ago support was merged for DMA segment sizes smaller than the
virtual memory page size. No blktests exist yet for the new codepaths related
to small segment size support. This patch series makes it possible to test
these code paths on a system (e.g. a VM) with 4 KiB pages.

The corresponding blktest patch is available here:
https://lore.kernel.org/linux-block/20260323200751.1238583-1-bvanassche@acm.org/

Please consider this patch series for the next merge window.

Thanks,

Bart.

Bart Van Assche (2):
  block: Reduce BLK_MIN_SEGMENT_SIZE
  null_blk: Support configuring the maximum segment size

 block/blk.h                       |  2 +-
 drivers/block/null_blk/main.c     | 13 +++++++++++++
 drivers/block/null_blk/null_blk.h |  1 +
 3 files changed, 15 insertions(+), 1 deletion(-)


             reply	other threads:[~2026-03-23 20:29 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-03-23 20:29 Bart Van Assche [this message]
2026-03-23 20:29 ` [PATCH 1/2] block: Reduce BLK_MIN_SEGMENT_SIZE Bart Van Assche
2026-03-23 20:29 ` [PATCH 2/2] null_blk: Support configuring the maximum segment size Bart Van Assche
2026-03-24 20:10   ` Damien Le Moal

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