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From: Oscar Salvador <osalvador@techadventures.net>
To: Pavel Tatashin <pasha.tatashin@oracle.com>
Cc: Steven Sistare <steven.sistare@oracle.com>,
	Daniel Jordan <daniel.m.jordan@oracle.com>,
	LKML <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	kirill.shutemov@linux.intel.com, Michal Hocko <mhocko@suse.com>,
	Linux Memory Management List <linux-mm@kvack.org>,
	dan.j.williams@intel.com, jack@suse.cz, jglisse@redhat.com,
	Souptick Joarder <jrdr.linux@gmail.com>,
	bhe@redhat.com, gregkh@linuxfoundation.org,
	Vlastimil Babka <vbabka@suse.cz>,
	Wei Yang <richard.weiyang@gmail.com>,
	dave.hansen@intel.com, rientjes@google.com, mingo@kernel.org,
	abdhalee@linux.vnet.ibm.com, mpe@ellerman.id.au
Subject: Re: [PATCH v2 2/3] mm: calculate deferred pages after skipping mirrored memory
Date: Fri, 27 Jul 2018 17:07:30 +0200	[thread overview]
Message-ID: <20180727150730.GA14428@techadventures.net> (raw)
In-Reply-To: <CAGM2reZnrwy1Y8MFRgyDLG8VZ6Hf+v-PAmZvUG4H65zunmjWZw@mail.gmail.com>

On Fri, Jul 27, 2018 at 10:53:24AM -0400, Pavel Tatashin wrote:
>                          unsigned long *nr_initialised)
> > > +static bool __meminit
> > > +defer_init(int nid, unsigned long pfn, unsigned long end_pfn)
> >
> > Hi Pavel,
> >
> > maybe I do not understand properly the __init/__meminit macros, but should not
> > "defer_init" be __init instead of __meminit?
> > I think that functions marked as __meminit are not freed up, right?
> 
> Not exactly. As I understand: __meminit is the same as __init when
> CONFIG_MEMORY_HOTPLUG=n. But, when memory hotplug is configured,
> __meminit is not freed, because code that adds memory is shared
> between boot and hotplug. In this case defer_init() is called only
> during boot, and could be __init, but it is called from
> memmap_init_zone() which is __meminit and thus section mismatch would
> happen.

Oh yes, I did not think about memmap_init_zone(), you are right.
Then, nothing to argue about ;-).

Thanks
-- 
Oscar Salvador
SUSE L3

  reply	other threads:[~2018-07-27 15:07 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-26 19:35 [PATCH v2 0/3] memmap_init_zone improvements Pavel Tatashin
2018-07-26 19:35 ` [PATCH v2 1/3] mm: make memmap_init a proper function Pavel Tatashin
2018-07-26 19:35 ` [PATCH v2 2/3] mm: calculate deferred pages after skipping mirrored memory Pavel Tatashin
2018-07-27 11:56   ` Oscar Salvador
2018-07-27 14:53     ` Pavel Tatashin
2018-07-27 15:07       ` Oscar Salvador [this message]
2018-07-26 19:35 ` [PATCH v2 3/3] mm: move mirrored memory specific code outside of memmap_init_zone Pavel Tatashin

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