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Subject[PATCH v3 6/8] docs: sysfs-block: document virt_boundary_mask
Date
From: Eric Biggers <ebiggers@google.com>

/sys/block/<disk>/queue/virt_boundary_mask is completely undocumented.
Document it.

Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
---
Documentation/ABI/stable/sysfs-block | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/Documentation/ABI/stable/sysfs-block b/Documentation/ABI/stable/sysfs-block
index 288626e8cb532..8dd3e84a8aade 100644
--- a/Documentation/ABI/stable/sysfs-block
+++ b/Documentation/ABI/stable/sysfs-block
@@ -544,6 +544,18 @@ Description:
CONFIG_BLK_DEV_THROTTLING_LOW is enabled.


+What: /sys/block/<disk>/queue/virt_boundary_mask
+Date: April 2021
+Contact: linux-block@vger.kernel.org
+Description:
+ [RO] This file shows the I/O segment memory alignment mask for
+ the block device. I/O requests to this device will be split
+ between segments wherever either the memory address of the end
+ of the previous segment or the memory address of the beginning
+ of the current segment is not aligned to virt_boundary_mask + 1
+ bytes.
+
+
What: /sys/block/<disk>/queue/wbt_lat_usec
Date: November 2016
Contact: linux-block@vger.kernel.org
--
2.34.1
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