Re: [PATCH v2 0/2] perf maps: Improve the kcore maps merging

[Leo Yan]

Hi Ian,

On 5/15/24 22:39, Ian Rogers wrote:

[...]

> Thanks Leo, testing this change on perf-tools-next with an x86 debian
> laptop I see:
> ```
> $ perf test 24 -v
> 24: Object code reading:
> --- start ---
> test child forked, pid 3407499
> Looking at the vmlinux_path (8 entries long)
> symsrc__init: build id mismatch for vmlinux.
> symsrc__init: cannot get elf header.
> overlapping maps in [kernel.kallsyms] (disable tui for more info)
> Using /proc/kcore for kernel data
> Using /proc/kallsyms for symbols
> Parsing event 'cycles'
> Using CPUID GenuineIntel-6-8D-1
> mmap size 528384B
> Reading object code for memory address: 0xfffffffface8d64a
> File is: /proc/kcore
> On file address is: 0xfffffffface8d64a
> dso__data_read_offset failed
> ---- end(-1) ----
> 24: Object code reading                                             : FAILED!
> ```
> The test passes without the changes. Let me know if you need me to dig deeper.

I can reproduce this test failure at my side. I will look into it.

Thanks for testing!

Leo