From: Michal Hocko <mhocko@kernel.org>
To: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Vlastimil Babka <vbabka@suse.cz>,
linux-mm@kvack.org, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] mm, sparse: fix typo in online_mem_sections
Date: Tue, 5 Sep 2017 09:28:36 +0200 [thread overview]
Message-ID: <20170905072836.i4dxrukevojty4ub@dhcp22.suse.cz> (raw)
In-Reply-To: <4d648f70-325d-3f60-8620-94c232b380d8@linux.vnet.ibm.com>
On Tue 05-09-17 12:32:28, Anshuman Khandual wrote:
> On 09/04/2017 04:52 PM, Michal Hocko wrote:
> > From: Michal Hocko <mhocko@suse.com>
> >
> > online_mem_sections accidentally marks online only the first section in
> > the given range. This is a typo which hasn't been noticed because I
> > haven't tested large 2GB blocks previously. All users of
>
> Section sizes are normally less than 2GB. Could you please elaborate
> why this never got noticed before ?
Section size is 128MB which is the default block size as well. So we
have one section per block. But if the amount of memory is very large
(64GB - see probe_memory_block_size) then we have a 2GB memory blocks
so multiple sections per block.
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2017-09-05 7:28 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-04 11:22 [PATCH] mm, sparse: fix typo in online_mem_sections Michal Hocko
2017-09-05 7:02 ` Anshuman Khandual
2017-09-05 7:28 ` Michal Hocko [this message]
2017-09-05 7:37 ` Michal Hocko
2017-09-05 8:44 ` Anshuman Khandual
2017-09-06 8:18 ` Vlastimil Babka
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