diff mbox series

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

Message ID 20211201084524.25660-6-ebiggers@kernel.org (mailing list archive)
State New, archived
Headers show
Series docs: consolidate sysfs-block into Documentation/ABI/ | expand

Commit Message

Eric Biggers Dec. 1, 2021, 8:45 a.m. UTC 
From: Eric Biggers <ebiggers@google.com>

/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 mbox series

Patch

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