From: Andi Kleen <andi@firstfloor.org>
To: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Mel Gorman <mgorman@suse.de>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, Hugh Dickins <hughd@google.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Andi Kleen <andi@firstfloor.org>, Hillf Danton <dhillf@gmail.com>,
Michal Hocko <mhocko@suse.cz>, Rik van Riel <riel@redhat.com>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
Wanpeng Li <liwanp@linux.vnet.ibm.com>,
linux-kernel@vger.kernel.org,
Naoya Horiguchi <nao.horiguchi@gmail.com>
Subject: Re: [PATCH 5/9] mbind: add hugepage migration code to mbind()
Date: Wed, 11 Sep 2013 00:47:04 +0200 [thread overview]
Message-ID: <20130910224704.GD18242@two.firstfloor.org> (raw)
In-Reply-To: <1378850009-y4wd5ph0-mutt-n-horiguchi@ah.jp.nec.com>
> > It makes me wonder how actually useful generic hugetlbfs page migration
> > will be in practice. Are there really usecases where the system
> > administrator is willing to create unused hugepage pools on each node
> > just to enable migration?
>
> Maybe most users don't want it.
I'm sure some power users will be willing to do that.
Of course for a lot of others THP is enough.
-Andi
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WARNING: multiple messages have this Message-ID (diff)
From: Andi Kleen <andi@firstfloor.org>
To: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Mel Gorman <mgorman@suse.de>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, Hugh Dickins <hughd@google.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Andi Kleen <andi@firstfloor.org>, Hillf Danton <dhillf@gmail.com>,
Michal Hocko <mhocko@suse.cz>, Rik van Riel <riel@redhat.com>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
Wanpeng Li <liwanp@linux.vnet.ibm.com>,
linux-kernel@vger.kernel.org,
Naoya Horiguchi <nao.horiguchi@gmail.com>
Subject: Re: [PATCH 5/9] mbind: add hugepage migration code to mbind()
Date: Wed, 11 Sep 2013 00:47:04 +0200 [thread overview]
Message-ID: <20130910224704.GD18242@two.firstfloor.org> (raw)
In-Reply-To: <1378850009-y4wd5ph0-mutt-n-horiguchi@ah.jp.nec.com>
> > It makes me wonder how actually useful generic hugetlbfs page migration
> > will be in practice. Are there really usecases where the system
> > administrator is willing to create unused hugepage pools on each node
> > just to enable migration?
>
> Maybe most users don't want it.
I'm sure some power users will be willing to do that.
Of course for a lot of others THP is enough.
-Andi
next prev parent reply other threads:[~2013-09-10 22:47 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-09 5:21 [PATCH v5 0/9] extend hugepage migration Naoya Horiguchi
2013-08-09 5:21 ` Naoya Horiguchi
2013-08-09 5:21 ` [PATCH 1/9] migrate: make core migration code aware of hugepage Naoya Horiguchi
2013-08-09 5:21 ` Naoya Horiguchi
2013-09-10 13:51 ` Mel Gorman
2013-09-10 13:51 ` Mel Gorman
2013-09-10 19:18 ` Naoya Horiguchi
2013-09-10 19:18 ` Naoya Horiguchi
2013-08-09 5:21 ` [PATCH 2/9] soft-offline: use migrate_pages() instead of migrate_huge_page() Naoya Horiguchi
2013-08-09 5:21 ` Naoya Horiguchi
2013-08-09 5:21 ` [PATCH 3/9] migrate: add hugepage migration code to migrate_pages() Naoya Horiguchi
2013-08-09 5:21 ` Naoya Horiguchi
2013-08-14 23:41 ` Andrew Morton
2013-08-14 23:41 ` Andrew Morton
2013-08-15 1:15 ` Naoya Horiguchi
2013-08-15 1:15 ` Naoya Horiguchi
2013-09-10 14:33 ` Mel Gorman
2013-09-10 14:33 ` Mel Gorman
2013-09-10 19:45 ` Naoya Horiguchi
2013-09-10 19:45 ` Naoya Horiguchi
2013-08-09 5:21 ` [PATCH 4/9] migrate: add hugepage migration code to move_pages() Naoya Horiguchi
2013-08-09 5:21 ` Naoya Horiguchi
2013-09-28 17:26 ` Borislav Petkov
2013-09-28 17:26 ` Borislav Petkov
2013-09-30 15:01 ` Naoya Horiguchi
2013-09-30 15:01 ` Naoya Horiguchi
2013-09-30 16:04 ` Borislav Petkov
2013-09-30 16:04 ` Borislav Petkov
2013-09-30 16:08 ` Naoya Horiguchi
2013-09-30 16:08 ` Naoya Horiguchi
2013-11-12 11:56 ` Borislav Petkov
2013-11-12 11:56 ` Borislav Petkov
2013-11-14 15:47 ` [PATCH] mm/migrate.c: take returned value of isolate_huge_page()(Re: [PATCH 4/9] migrate: add hugepage migration code to move_pages()) Naoya Horiguchi
2013-11-14 15:47 ` Naoya Horiguchi
2013-11-14 23:11 ` David Rientjes
2013-11-14 23:11 ` David Rientjes
2013-11-15 15:03 ` [PATCH] mm/migrate.c: take returned value ofisolate_huge_page()(Re: [PATCH 4/9] migrate: add hugepage migration code tomove_pages()) Naoya Horiguchi
2013-11-15 15:03 ` Naoya Horiguchi
2013-11-15 23:01 ` David Rientjes
2013-11-15 23:01 ` David Rientjes
2013-08-09 5:21 ` [PATCH 5/9] mbind: add hugepage migration code to mbind() Naoya Horiguchi
2013-08-09 5:21 ` Naoya Horiguchi
2013-09-10 14:41 ` Mel Gorman
2013-09-10 14:41 ` Mel Gorman
2013-09-10 21:53 ` Naoya Horiguchi
2013-09-10 21:53 ` Naoya Horiguchi
2013-09-10 22:47 ` Andi Kleen [this message]
2013-09-10 22:47 ` Andi Kleen
2013-08-09 5:21 ` [PATCH 6/9] migrate: remove VM_HUGETLB from vma flag check in vma_migratable() Naoya Horiguchi
2013-08-09 5:21 ` Naoya Horiguchi
2013-08-09 5:21 ` [PATCH 7/9] memory-hotplug: enable memory hotplug to handle hugepage Naoya Horiguchi
2013-08-09 5:21 ` Naoya Horiguchi
2013-08-09 5:21 ` [PATCH 8/9] migrate: check movability of hugepage in unmap_and_move_huge_page() Naoya Horiguchi
2013-08-09 5:21 ` Naoya Horiguchi
2013-08-11 17:51 ` Aneesh Kumar K.V
2013-08-11 17:51 ` Aneesh Kumar K.V
2013-08-09 5:21 ` [PATCH 9/9] prepare to remove /proc/sys/vm/hugepages_treat_as_movable Naoya Horiguchi
2013-08-09 5:21 ` Naoya Horiguchi
2013-08-11 17:43 ` Aneesh Kumar K.V
2013-08-11 17:43 ` Aneesh Kumar K.V
2013-08-12 18:10 ` Naoya Horiguchi
2013-08-12 18:10 ` Naoya Horiguchi
2013-09-10 14:48 ` Mel Gorman
2013-09-10 14:48 ` Mel Gorman
2013-08-14 23:40 ` [PATCH v5 0/9] extend hugepage migration Andrew Morton
2013-08-14 23:40 ` Andrew Morton
2013-08-15 6:23 ` Naoya Horiguchi
2013-08-15 6:23 ` Naoya Horiguchi
2013-08-15 19:39 ` Andrew Morton
2013-08-15 19:39 ` Andrew Morton
2013-08-15 19:48 ` Naoya Horiguchi
2013-08-15 19:48 ` Naoya Horiguchi
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