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From: Max Gurtovoy <mgurtovoy@nvidia.com>
To: <linux-block@vger.kernel.org>, <axboe@kernel.dk>
Cc: <martin.petersen@oracle.com>, Max Gurtovoy <mgurtovoy@nvidia.com>
Subject: [PATCH 1/1] block: add sysfs entry for virt boundary mask
Date: Mon, 5 Apr 2021 13:20:12 +0000	[thread overview]
Message-ID: <20210405132012.12504-1-mgurtovoy@nvidia.com> (raw)

This entry will expose the bio vector alignment mask for a specific
block device.

Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
---
 block/blk-sysfs.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 0f4f0c8a7825..86a545e6d82d 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -264,6 +264,11 @@ static ssize_t queue_max_hw_sectors_show(struct request_queue *q, char *page)
 	return queue_var_show(max_hw_sectors_kb, (page));
 }
 
+static ssize_t queue_virt_boundary_mask_show(struct request_queue *q, char *page)
+{
+	return queue_var_show(q->limits.virt_boundary_mask, (page));
+}
+
 #define QUEUE_SYSFS_BIT_FNS(name, flag, neg)				\
 static ssize_t								\
 queue_##name##_show(struct request_queue *q, char *page)		\
@@ -610,6 +615,7 @@ QUEUE_RO_ENTRY(queue_fua, "fua");
 QUEUE_RO_ENTRY(queue_dax, "dax");
 QUEUE_RW_ENTRY(queue_io_timeout, "io_timeout");
 QUEUE_RW_ENTRY(queue_wb_lat, "wbt_lat_usec");
+QUEUE_RO_ENTRY(queue_virt_boundary_mask, "virt_boundary_mask");
 
 #ifdef CONFIG_BLK_DEV_THROTTLING_LOW
 QUEUE_RW_ENTRY(blk_throtl_sample_time, "throttle_sample_time");
@@ -670,6 +676,7 @@ static struct attribute *queue_attrs[] = {
 #ifdef CONFIG_BLK_DEV_THROTTLING_LOW
 	&blk_throtl_sample_time_entry.attr,
 #endif
+	&queue_virt_boundary_mask_entry.attr,
 	NULL,
 };
 
-- 
2.25.4


             reply	other threads:[~2021-04-05 13:20 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-05 13:20 Max Gurtovoy [this message]
2021-04-05 17:40 ` [PATCH 1/1] block: add sysfs entry for virt boundary mask Chaitanya Kulkarni
2021-04-06  1:46 ` Ming Lei
2021-04-06  1:53 ` Martin K. Petersen
2021-04-06  8:16   ` Max Gurtovoy
2021-04-06 15:23 ` Jens Axboe

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