[Crash-utility] [PATCH v2 0/2] Get diskio statistics from the hw queues in blk-mq

Currently, crash doesn't support to display disk I/O statistics for blk-mq devices. The patchset will implement it by parsing the bitmap, it includes two patches: [1] [PATCH 1/2] Support for "dev -d|-D" options by parsing bitmap in blk-mq layer [2] [PATCH 2/2] Fix for "dev -d|-D" options to correctly display disk I/O statistics on linux v5.18-rc1 Related kernel commits: [1] commit <9a14d6ce4135> ("block: remove debugfs blk_mq_ctx dispatched/merged/completed attributes") [2] commit <4e5cc99e1e48> ("blk-mq: manage hctx map via xarray") The patchset is tested on v5.17.0-rc8 and the latest kernel 5.18.0-rc4. Note: The patchset depends on the implementation of sbitmap.c, so need to apply another patchset: "[PATCH 0/4] Fix for "sbitmapq" command" before testing it, otherwise it won't work. Link: https://www.mail-archive.com/crash-utility@redhat.com/msg09177.html Lianbo Jiang (2): Support for "dev -d|-D" options by parsing bitmap in blk-mq layer Fix for "dev -d|-D" options to correctly display disk I/O statistics on linux v5.18-rc1 defs.h | 13 +++ dev.c | 316 +++++++++++++++++++++++++++++++++++++++++++++++------- symbols.c | 26 +++++ 3 files changed, 316 insertions(+), 39 deletions(-) -- 2.20.1