Merge tag 'cxl-for-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl

[linux-2.6-microblaze.git] / Documentation / ABI / testing / sysfs-block

diff --git a/Documentation/ABI/testing/sysfs-block b/Documentation/ABI/testing/sysfs-block
index 2322eb7..a0ed873 100644 (file)
--- a/Documentation/ABI/testing/sysfs-block
+++ b/Documentation/ABI/testing/sysfs-block
@@ -4,26 +4,42 @@ Contact:      Jerome Marchand <jmarchan@redhat.com>
 Description:
                The /sys/block/<disk>/stat files displays the I/O
                statistics of disk <disk>. They contain 11 fields:
-                1 - reads completed successfully
-                2 - reads merged
-                3 - sectors read
-                4 - time spent reading (ms)
-                5 - writes completed
-                6 - writes merged
-                7 - sectors written
-                8 - time spent writing (ms)
-                9 - I/Os currently in progress
-               10 - time spent doing I/Os (ms)
-               11 - weighted time spent doing I/Os (ms)
-               12 - discards completed
-               13 - discards merged
-               14 - sectors discarded
-               15 - time spent discarding (ms)
-               16 - flush requests completed
-               17 - time spent flushing (ms)
+
+               ==  ==============================================
+                1  reads completed successfully
+                2  reads merged
+                3  sectors read
+                4  time spent reading (ms)
+                5  writes completed
+                6  writes merged
+                7  sectors written
+                8  time spent writing (ms)
+                9  I/Os currently in progress
+               10  time spent doing I/Os (ms)
+               11  weighted time spent doing I/Os (ms)
+               12  discards completed
+               13  discards merged
+               14  sectors discarded
+               15  time spent discarding (ms)
+               16  flush requests completed
+               17  time spent flushing (ms)
+               ==  ==============================================
+
                For more details refer Documentation/admin-guide/iostats.rst
 
 
+What:          /sys/block/<disk>/diskseq
+Date:          February 2021
+Contact:       Matteo Croce <mcroce@microsoft.com>
+Description:
+               The /sys/block/<disk>/diskseq files reports the disk
+               sequence number, which is a monotonically increasing
+               number assigned to every drive.
+               Some devices, like the loop device, refresh such number
+               every time the backing file is changed.
+               The value type is 64 bit unsigned.
+
+
 What:          /sys/block/<disk>/<part>/stat
 Date:          February 2008
 Contact:       Jerome Marchand <jmarchan@redhat.com>