From 87caf97cf54b5082e56af241b88a2b8a30d17ef3 Mon Sep 17 00:00:00 2001 From: Hannes Reinecke Date: Tue, 18 Oct 2016 15:40:30 +0900 Subject: blk-sysfs: Add 'chunk_sectors' to sysfs attributes The queue limits already have a 'chunk_sectors' setting, so we should be presenting it via sysfs. Signed-off-by: Hannes Reinecke [Damien: Updated Documentation/ABI/testing/sysfs-block] Signed-off-by: Damien Le Moal Reviewed-by: Christoph Hellwig Reviewed-by: Martin K. Petersen Reviewed-by: Shaun Tancheff Tested-by: Shaun Tancheff Signed-off-by: Jens Axboe --- Documentation/ABI/testing/sysfs-block | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'Documentation/ABI') diff --git a/Documentation/ABI/testing/sysfs-block b/Documentation/ABI/testing/sysfs-block index 75a5055a722b..ee2d5cd26bfe 100644 --- a/Documentation/ABI/testing/sysfs-block +++ b/Documentation/ABI/testing/sysfs-block @@ -251,3 +251,16 @@ Description: since drive-managed zoned block devices do not support zone commands, they will be treated as regular block devices and zoned will report "none". + +What: /sys/block//queue/chunk_sectors +Date: September 2016 +Contact: Hannes Reinecke +Description: + chunk_sectors has different meaning depending on the type + of the disk. For a RAID device (dm-raid), chunk_sectors + indicates the size in 512B sectors of the RAID volume + stripe segment. For a zoned block device, either + host-aware or host-managed, chunk_sectors indicates the + size of 512B sectors of the zones of the device, with + the eventual exception of the last zone of the device + which may be smaller. -- cgit v1.2.3