[PATCHv2 2/2] [fs] proc/vmcore: check the dummy place holder for offline cpu to avoid warning

[Pratyush Anand]

On Monday 19 December 2016 08:10 AM, Dave Young wrote:
> Hi, Pingfan
>
> On 12/19/16 at 10:08am, Pingfan Liu wrote:
>> > kexec-tools always allocates program headers for present cpus. But
>> > when crashing, offline cpus have dummy headers. We do not copy these
>> > dummy notes into ELF file, also have no need of warning on them.
> I still think it is not worth such a fix, if you feel a lot of warnings
> in case large cpu numbers, I think you can change the pr_warn to
> pr_warn_once, we do not care the null cpu notes if it has nothing bad
> to the vmcore.
>

I agree. Warning is more like information here. May be, we can count the 
number of times real_sz was 0, and then can print an info at the end in 
stead of warning, like..."N number of CPUs would have been offline, 
PT_NOTE entries was absent for them."

~Pratyush