Re: [PATCH 4.14 023/159] mm/sparsemem: Allocate mem_section at runtime for CONFIG_SPARSEMEM_EXTREME=y

[Kirill A. Shutemov]

On Wed, Jan 10, 2018 at 03:08:04AM +0000, Dave Young wrote:
> On Tue, Jan 09, 2018 at 12:05:52PM +0300, Kirill A. Shutemov wrote:
> > On Tue, Jan 09, 2018 at 03:24:40PM +0800, Dave Young wrote:
> > > On 01/09/18 at 01:41pm, Baoquan He wrote:
> > > > On 01/09/18 at 09:09am, Dave Young wrote:
> > > > 
> > > > > As for the macro name, VMCOREINFO_SYMBOL_ARRAY sounds better.
> > 
> > Yep, that's better.
> > 
> > > > I still think using vmcoreinfo_append_str is better. Unless we replace
> > > > all array variables with the newly added macro.
> > > > 
> > > > vmcoreinfo_append_str("SYMBOL(mem_section)=%lx\n",
> > > >                                 (unsigned long)mem_section);
> > > 
> > > I have no strong opinion, either change all array uses or just introduce
> > > the macro and start to use it from now on if we have similar array
> > > symbols.
> > 
> > Do you need some action on my side or will you folks take care about this?
> 
> I think Baoquan was suggesting to update all array users in current
> code, if you can check every VMCOREINFO_SYMBOL and update all the arrays
> he will be happy. But if can not do it easily I'm fine with a
> VMCOREINFO_SYMBOL_ARRAY changes only now, we kdump people can do it
> later as well. 

It seems it's the only array we have there. swapper_pg_dir is a potential
candidate, but it's 'unsigned long' on arm.

Below it patch with corrected macro name.

Please, consider applying.