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![]() Add version checks to print_delayacct() to handle differences in struct taskstats across kernel versions. Field availability depends on taskstats version (t->version), corresponding to TASKSTATS_VERSION in kernel headers (see include/uapi/linux/taskstats.h). Version feature mapping: - version >= 11 - supports COMPACT statistics - version >= 13 - supports WPCOPY statistics - version >= 14 - supports IRQ statistics - version >= 16 - supports *_max and *_min delay statistics This ensures the tool works correctly with both older and newer kernel versions by conditionally printing fields based on the reported version. eg.1 bash# grep -r "#define TASKSTATS_VERSION" /usr/include/linux/taskstats.h "#define TASKSTATS_VERSION 10" bash# ./getdelays -d -p 1 CPU count real total virtual total delay total delay average 7481 3786181709 3807098291 36393725 0.005ms IO count delay total delay average 369 1116046035 3.025ms SWAP count delay total delay average 0 0 0.000ms RECLAIM count delay total delay average 0 0 0.000ms THRASHING count delay total delay average 0 0 0.000ms eg.2 bash# grep -r "#define TASKSTATS_VERSION" /usr/include/linux/taskstats.h "#define TASKSTATS_VERSION 14" bash# ./getdelays -d -p 1 CPU count real total virtual total delay total delay average 68862 163474790046 174584722267 19962496806 0.290ms IO count delay total delay average 0 0 0.000ms SWAP count delay total delay average 0 0 0.000ms RECLAIM count delay total delay average 0 0 0.000ms THRASHING count delay total delay average 0 0 0.000ms COMPACT count delay total delay average 0 0 0.000ms WPCOPY count delay total delay average 0 0 0.000ms IRQ count delay total delay average 0 0 0.000ms Link: https://lkml.kernel.org/r/20250731225326549CttJ7g9NfjTlaqBwl015T@zte.com.cn Signed-off-by: Fan Yu <fan.yu9@zte.com.cn> Cc: Fan Yu <fan.yu9@zte.com.cn> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Wang Yaxin <wang.yaxin@zte.com.cn> Cc: xu xin <xu.xin16@zte.com.cn> Cc: Yang Yang <yang.yang29@zte.com.cn> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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.. | ||
.gitignore | ||
delaytop.c | ||
getdelays.c | ||
Makefile | ||
procacct.c |