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Diffstat (limited to 'Documentation/ABI/testing/procfs-diskstats')
| -rw-r--r-- | Documentation/ABI/testing/procfs-diskstats | 51 |
1 files changed, 36 insertions, 15 deletions
diff --git a/Documentation/ABI/testing/procfs-diskstats b/Documentation/ABI/testing/procfs-diskstats index f91a973a37fe..6a719cf2075c 100644 --- a/Documentation/ABI/testing/procfs-diskstats +++ b/Documentation/ABI/testing/procfs-diskstats @@ -5,18 +5,39 @@ Description: The /proc/diskstats file displays the I/O statistics of block devices. Each line contains the following 14 fields: - 1 - major number - 2 - minor mumber - 3 - device name - 4 - reads completed successfully - 5 - reads merged - 6 - sectors read - 7 - time spent reading (ms) - 8 - writes completed - 9 - writes merged - 10 - sectors written - 11 - time spent writing (ms) - 12 - I/Os currently in progress - 13 - time spent doing I/Os (ms) - 14 - weighted time spent doing I/Os (ms) - For more details refer to Documentation/iostats.txt + + == =================================== + 1 major number + 2 minor number + 3 device name + 4 reads completed successfully + 5 reads merged + 6 sectors read + 7 time spent reading (ms) + 8 writes completed + 9 writes merged + 10 sectors written + 11 time spent writing (ms) + 12 I/Os currently in progress + 13 time spent doing I/Os (ms) + 14 weighted time spent doing I/Os (ms) + == =================================== + + Kernel 4.18+ appends four more fields for discard + tracking putting the total at 18: + + == =================================== + 15 discards completed successfully + 16 discards merged + 17 sectors discarded + 18 time spent discarding + == =================================== + + Kernel 5.5+ appends two more fields for flush requests: + + == ===================================== + 19 flush requests completed successfully + 20 time spent flushing + == ===================================== + + For more details refer to Documentation/admin-guide/iostats.rst |