linux-kernel - [v1 0/2] enable sector size > PAGE

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Message-ID: <20251210014136.2549405-1-sw.prabhu6@gmail.com>
Date: Wed, 10 Dec 2025 01:41:34 +0000
From: sw.prabhu6@...il.com
To: James.Bottomley@...senPartnership.com,
	martin.petersen@...cle.com,
	linux-scsi@...r.kernel.org
Cc: bvanassche@....org,
	linux-kernel@...r.kernel.org,
	mcgrof@...nel.org,
	kernel@...kajraghav.com,
	dlemoal@...nel.org,
	Swarna Prabhu <sw.prabhu6@...il.com>
Subject: [v1 0/2] enable sector size > PAGE_SIZE for scsi

From: Swarna Prabhu <sw.prabhu6@...il.com>

Hi All,

This is non RFC v1 series sent based on the feedback received on RFC
v2 [1] and RFC v1 [2]. This patchset enables sector sizes > PAGE_SIZE for
sd driver and scsi_debug driver since block layer can support block
size > PAGE_SIZE. There was one issue with write_same16 and write_same10
command, which is fixed as a part of the series.

Motivation:
 - While enabling LBS on ZoneFS, zonefs-tools tests were being skipped
   for conventional zones when tested on nvme block device emulated using
   QEMU. Hence there was a need to enable scsi with higher sector sizes
   to run zonefs tests for conventional zones as well.

Changes since RFC v2:
 - Replaced open coded check for enabling sdebug_sector_size > PAGE_SIZE
   with blk_validate_block_size() in scsi_debug.
 - Replaced open coded check for enabling sector_size > PAGE_SIZE
   with blk_validate_block_size() in sd driver.
 - Replaced 'struct request *rq' argument in  'sd_set_special_bvec()' to
   'struct scsi_cmnd *cmnd' and used that to get SCSI device pointer
   'struct scsi_device *sdp'.
 - Slightly modified the commit title for scsi sd driver fix patch.
 - Added "Cc: stable@...r.kernel.org" tag to scsi sd driver fix patch.

Changes since RFC v1:
 - Re organized the patch series into one patch for scsi_debug driver
   and one patch for sd driver.
 - Updated commit title and description to accommodate the above
   re organization on commit titled - scsi: sd: fix write_same(16/10)
   to enable sector size > PAGE_SIZE.
 - Updated commit title and description to reflect the re organization
   on commit titled - scsi: scsi_debug: enable sdebug_sector_size
   > PAGE_SIZE.

Thanks to Bart for feedback on the RFC v1 and v2 series.

Testing:
 -Test suite: xfs and generic from fstest + QEMU emulated block
    device(scsi and nvme)
  - fstest Config for patched xfs 16k block size [xfs_reflink_16k_scsi]
    TEST_DEV=/dev/sda
    SCRATCH_DEV_POOL="/dev/sdb"
    MKFS_OPTIONS='-f -m reflink=1,rmapbt=1, -i sparse=1, -b size=16384,
    -s size=16384'
  - Generic test results
    Baseline: 6.18.0-rc7 kernel + nvme 16k logical block size
    Patched: 6.18 kernel + scsi 16k logical block size
    5 failures seen on generic tests and the same seen on baseline
    No regressions introduced by the patch.
  - XFS tests results
    Baseline: 6.18.0-rc7 kernel + nvme16k logical block size
    Patched: 6.18 kernel + sci 16k logical block size
    30 failures seen on patched and baseline
    No regressions introduced by the patch
  - Blktests results
    scis and block layer tests with 16k and 32k logical block size.
    config used:
    TEST_DEVS=(/dev/sda)
    EXCLUDE=(block/010 block/011) # these didn't run on baseline(nvme 16k)
    All tests passed.

Link to RFC v2: https://lore.kernel.org/all/20251203230546.1275683-2-sw.prabhu6@gmail.com/ [1]
Link to RFC v1: https://lore.kernel.org/all/20251202021522.188419-1-sw.prabhu6@gmail.com/ [2]

Swarna Prabhu (2):
  scsi: sd: fix write_same(16/10) to enable sector size > PAGE_SIZE
  scsi: scsi_debug: enable sdebug_sector_size > PAGE_SIZE

 drivers/scsi/scsi_debug.c |  8 +-------
 drivers/scsi/sd.c         | 27 +++++++++++++++++----------
 2 files changed, 18 insertions(+), 17 deletions(-)

-- 
2.51.0