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From: Bart Van Assche <bvanassche@acm.org>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org,
	Christoph Hellwig <hch@lst.de>,
	Adrian Hunter <adrian.hunter@intel.com>,
	Avri Altman <avri.altman@wdc.com>,
	Bart Van Assche <bvanassche@acm.org>,
	Doug Gilbert <dgilbert@interlog.com>,
	"Martin K . Petersen" <martin.petersen@oracle.com>
Subject: [PATCH v2 7/8] scsi_debug: Support configuring the maximum segment size
Date: Wed, 23 Nov 2022 12:57:39 -0800	[thread overview]
Message-ID: <20221123205740.463185-8-bvanassche@acm.org> (raw)
In-Reply-To: <20221123205740.463185-1-bvanassche@acm.org>

Add a kernel module parameter for configuring the maximum segment size.
This patch enables testing SCSI support for segments smaller than the
page size.

Cc: Doug Gilbert <dgilbert@interlog.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 drivers/scsi/scsi_debug.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index bebda917b138..ea8f762c55c3 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -770,6 +770,7 @@ static int sdebug_sector_size = DEF_SECTOR_SIZE;
 static int sdeb_tur_ms_to_ready = DEF_TUR_MS_TO_READY;
 static int sdebug_virtual_gb = DEF_VIRTUAL_GB;
 static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
+static unsigned int sdebug_max_segment_size = -1U;
 static unsigned int sdebug_lbpu = DEF_LBPU;
 static unsigned int sdebug_lbpws = DEF_LBPWS;
 static unsigned int sdebug_lbpws10 = DEF_LBPWS10;
@@ -5851,6 +5852,7 @@ module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR);
 module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR);
 module_param_named(no_rwlock, sdebug_no_rwlock, bool, S_IRUGO | S_IWUSR);
 module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO);
+module_param_named(max_segment_size, sdebug_max_segment_size, uint, S_IRUGO);
 module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO);
 module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR);
 module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO);
@@ -7815,6 +7817,7 @@ static int sdebug_driver_probe(struct device *dev)
 
 	sdebug_driver_template.can_queue = sdebug_max_queue;
 	sdebug_driver_template.cmd_per_lun = sdebug_max_queue;
+	sdebug_driver_template.max_segment_size = sdebug_max_segment_size;
 	if (!sdebug_clustering)
 		sdebug_driver_template.dma_boundary = PAGE_SIZE - 1;
 

  parent reply	other threads:[~2022-11-23 20:58 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-23 20:57 [PATCH v2 0/8] Add support for segments smaller than one page Bart Van Assche
2022-11-23 20:57 ` [PATCH v2 1/8] block: Introduce CONFIG_BLK_SUB_PAGE_SEGMENTS and QUEUE_FLAG_SUB_PAGE_SEGMENTS Bart Van Assche
2022-11-23 20:57 ` [PATCH v2 2/8] block: Support configuring limits below the page size Bart Van Assche
2022-11-23 20:57 ` [PATCH v2 3/8] block: Support submitting passthrough requests with small segments Bart Van Assche
2022-11-23 20:57 ` [PATCH v2 4/8] block: Add support for filesystem requests and " Bart Van Assche
2022-11-23 20:57 ` [PATCH v2 5/8] block: Add support for small segments in blk_rq_map_user_iov() Bart Van Assche
2022-11-23 20:57 ` [PATCH v2 6/8] scsi: core: Set the SUB_PAGE_SEGMENTS request queue flag Bart Van Assche
2022-11-23 20:57 ` Bart Van Assche [this message]
2022-11-25 17:34   ` [PATCH v2 7/8] scsi_debug: Support configuring the maximum segment size Douglas Gilbert
2022-11-30 22:30     ` Bart Van Assche
2022-11-23 20:57 ` [PATCH v2 8/8] null_blk: " Bart Van Assche
2022-11-24  1:40   ` Damien Le Moal
2022-11-30 22:29     ` Bart Van Assche
2022-12-01  0:39       ` Damien Le Moal

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