From: Tony Luck <[email protected]> New file in the "info" directory helps diagnose what went wrong when using the /sys/fs/resctrl file system
Signed-off-by: Tony Luck <[email protected]> --- Documentation/x86/intel_rdt_ui.txt | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/Documentation/x86/intel_rdt_ui.txt b/Documentation/x86/intel_rdt_ui.txt index 4d8848e4e224..6851854cf69d 100644 --- a/Documentation/x86/intel_rdt_ui.txt +++ b/Documentation/x86/intel_rdt_ui.txt @@ -87,6 +87,17 @@ with the following files: bytes) at which a previously used LLC_occupancy counter can be considered for re-use. +Finally, in the top level of the "info" directory there is a file +named "last_cmd_status". This is reset with every "command" issued +via the file system (making new directories or writing to any of the +control files). If the command was successful, it will read as "ok". +If the command failed, it will provide more information that can be +conveyed in the error returns from file operations. E.g. + + # echo L3:0=f7 > schemata + bash: echo: write error: Invalid argument + # cat info/last_cmd_status + mask f7 has non-consecutive 1-bits Resource alloc and monitor groups --------------------------------- -- 2.11.0
