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

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On Sun 07-01-18 13:44:02, Mike Galbraith wrote:
> On Sun, 2018-01-07 at 11:18 +0100, Michal Hocko wrote:
> > On Sun 07-01-18 10:11:15, Greg KH wrote:
> > > On Sun, Jan 07, 2018 at 06:14:22AM +0100, Mike Galbraith wrote:
> > > > On Fri, 2017-12-22 at 09:45 +0100, Greg Kroah-Hartman wrote:
> > > > > 4.14-stable review patch.  If anyone has any objections, please let me know.
> > > > 
> > > > FYI, this broke kdump, or rather the makedumpfile part thereof.
> > > >  Forward looking wreckage is par for the kdump course, but...
> > > 
> > > Is it also broken in Linus's tree with this patch?  Or is there an
> > > add-on patch that I should apply to 4.14 to resolve this issue there?
> > 
> > This one http://lkml.kernel.org/r/1513932498-20350-1-git-send-email-bhe@xxxxxxxxxx
> > I guess.
> 
> That won't unbreak kdump, else master wouldn't be broken.  I don't care
> deeply, or know if anyone else does, I'm just reporting it because I
> met it and chased it down.

OK, I didn't notice that d8cfbbfa0f7 ("mm/sparse.c: wrong allocation
for mem_section") made it in after rc6. I am still wondering why
83e3c48729 ("mm/sparsemem: Allocate mem_section at runtime for
CONFIG_SPARSEMEM_EXTREME=y") made it into the stable tree in the first
place.
-- 
Michal Hocko
SUSE Labs

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