From: Davidlohr Bueso <davidlohr@hp.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Luiz Capitulino <lcapitulino@redhat.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
mtosatti@redhat.com, mgorman@suse.de, aarcange@redhat.com,
andi@firstfloor.org, riel@redhat.com
Subject: Re: [PATCH 0/4] hugetlb: add hugepagesnid= command-line option
Date: Mon, 10 Feb 2014 19:58:13 -0800 [thread overview]
Message-ID: <1392091093.2501.7.camel@buesod1.americas.hpqcorp.net> (raw)
In-Reply-To: <20140210151354.68fe414f81335d4ce0e4c550@linux-foundation.org>
On Mon, 2014-02-10 at 15:13 -0800, Andrew Morton wrote:
> On Mon, 10 Feb 2014 12:27:44 -0500 Luiz Capitulino <lcapitulino@redhat.com> wrote:
>
> > HugeTLB command-line option hugepages= allows the user to specify how many
> > huge pages should be allocated at boot. On NUMA systems, this argument
> > automatically distributes huge pages allocation among nodes, which can
> > be undesirable.
>
> Grumble. "can be undesirable" is the entire reason for the entire
> patchset. We need far, far more detail than can be conveyed in three
> words, please!
One (not so real-world) scenario that comes right to mind which can
benefit for such a feature is the ability to study socket/node scaling
for hugepage aware applications. Yes, we do have numactl to bind
programs to resources, but I don't mind having a way of finer graining
hugetlb allocations, specially if it doesn't hurt anything.
Thanks,
Davidlohr
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next prev parent reply other threads:[~2014-02-11 3:58 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-10 17:27 Luiz Capitulino
2014-02-10 17:27 ` [PATCH 1/4] memblock: memblock_virt_alloc_internal(): alloc from specified node only Luiz Capitulino
2014-02-10 23:27 ` Andrew Morton
2014-02-11 9:20 ` Mel Gorman
2014-02-10 17:27 ` [PATCH 2/4] memblock: add memblock_virt_alloc_nid_nopanic() Luiz Capitulino
2014-02-10 17:27 ` [PATCH 3/4] hugetlb: add hugepagesnid= command-line option Luiz Capitulino
2014-02-10 23:27 ` Andrew Morton
2014-02-11 15:26 ` Luiz Capitulino
2014-02-12 3:44 ` Yasuaki Ishimatsu
2014-02-12 19:39 ` Luiz Capitulino
2014-02-10 17:27 ` [PATCH 4/4] hugetlb: hugepagesnid=: add 1G huge page support Luiz Capitulino
2014-02-10 23:30 ` Andrew Morton
2014-02-11 15:27 ` Luiz Capitulino
2014-02-10 17:55 ` [PATCH 0/4] hugetlb: add hugepagesnid= command-line option Luiz Capitulino
2014-02-10 23:13 ` Andrew Morton
2014-02-11 3:58 ` Davidlohr Bueso [this message]
2014-02-11 15:10 ` Luiz Capitulino
2014-02-11 2:54 ` David Rientjes
2014-02-11 9:25 ` Mel Gorman
2014-02-11 15:26 ` Marcelo Tosatti
2014-02-11 17:10 ` Mel Gorman
2014-02-11 20:15 ` Marcelo Tosatti
2014-02-12 10:39 ` Mel Gorman
2014-02-11 15:36 ` Luiz Capitulino
2014-02-12 3:59 ` David Rientjes
2014-02-12 20:09 ` Luiz Capitulino
2014-02-11 21:17 ` Andi Kleen
2014-02-11 21:31 ` Luiz Capitulino
2014-02-12 2:37 ` Andi Kleen
2014-02-12 4:01 ` David Rientjes
2014-02-12 19:33 ` Luiz Capitulino
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