On 07/02/18 21:03, Kim Phillips wrote:
Commit 1c8859848dbb ("coresight replicator: Cleanup programmable replicator naming") changed the Kconfig symbol name from QCOM_REPLICATOR, which, whilst not in the single arm64 defconfig, was being set in my juno build script, which left the new symbol unset, causing the following unexpected grief:# ./perf record -vvv -C 0 -e cs_etm/@20070000.etr/ --per-thread true ..<snip>.. sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 5 mmap size 528384B AUX area mmap length 4194304 perf event ring buffer mmapped per cpu failed to mmap AUX area failed to mmap with 12 (Cannot allocate memory) Make it default y to help not surprise unsuspecting users.
I think the best way to address this issue is to set the proper errno when we fail to build a path, say -ENODEV, that could give us a better clue on what is going wrong. Have you checked the dmesg to see if it complains about "build path" failure ? Cheers Suzuki
