[PATCH 5/7] docs: sysfs-block: document virt_boundary_mask

Eric Biggers
2021-12-01T08:47:13Z

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

Signed-off-by: Eric Biggers <ebiggers@google.com>
---
Documentation/ABI/testing/sysfs-block | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-block b/Documentation/ABI/testing/sysfs-block
index 5d8b187e1ec54..8cc795476244c 100644
--- a/Documentation/ABI/testing/sysfs-block
+++ b/Documentation/ABI/testing/sysfs-block
@@ -536,6 +536,17 @@ 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 alignment mask for the
+ block device. I/O requests to this device will be split between
+ segments wherever either the end of the previous segment or 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