Hi, I have disabled some options in kernel config file and rebuilt in an effort to reduce scheduler latency in my real time (preempt_rt patched) kernel. Disabled kprobes in general setup too. After this, I am not able to enable uprobe. I was facing no issue earlier, with default kernel config file with preempt_rt patch in tracing functions using uprobe. objdump file excerpt: ------------------------------- 0000000000408e8c <func>: 408e8c: 55 push %rbp xxxxx xxxxx 40dd1d: e8 23 79 ff ff callq 405645 <timeElapsed> xxxxx terminal commands : ------------------------------- root@brt:/home/brt/xxxxxxxx/out# echo 'p:func_entry test:0x40dd1d' > /sys/kernel/debug/tracing/uprobe_events root@brt:/home/brt/xxxxxxxx/out# cat /sys/kernel/debug/tracing/events/enable 0 root@brt:/home/brt/xxxxxxxx/out# echo 1 > /sys/kernel/debug/tracing/events/uprobes/enable root@brt:/home/brt/xxxxxxxx/out# cat /sys/kernel/debug/tracing/events/uprobes/enable 0 Relevant config options: ------------------------------- CONFIG_UPROBES=y CONFIG_UPROBE_EVENT=y CONFIG_PROBE_EVENTS=y # CONFIG_KPROBES is not set Does uprobe has any other dependency or config option that needs to be setup? Even if there is any issue in uprobe string or text, the tracing/events/uprobes/enable value should be able to be set once the uprobe is added to the file. Thank you, Bhargav -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
