From: Borislav Petkov <bp@alien8.de>
To: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, Mel Gorman <mgorman@suse.de>,
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 4/9] migrate: add hugepage migration code to move_pages()
Date: Sat, 28 Sep 2013 19:26:02 +0200 [thread overview]
Message-ID: <20130928172602.GA6191@pd.tnic> (raw)
In-Reply-To: <1376025702-14818-5-git-send-email-n-horiguchi@ah.jp.nec.com>
On Fri, Aug 09, 2013 at 01:21:37AM -0400, Naoya Horiguchi wrote:
> This patch extends move_pages() to handle vma with VM_HUGETLB set.
> We will be able to migrate hugepage with move_pages(2) after
> applying the enablement patch which comes later in this series.
>
> We avoid getting refcount on tail pages of hugepage, because unlike thp,
> hugepage is not split and we need not care about races with splitting.
>
> And migration of larger (1GB for x86_64) hugepage are not enabled.
>
> ChangeLog v4:
> - use get_page instead of get_page_foll
> - add comment in follow_page_mask
>
> ChangeLog v3:
> - revert introducing migrate_movable_pages
> - follow_page_mask(FOLL_GET) returns NULL for tail pages
> - use isolate_huge_page
>
> ChangeLog v2:
> - updated description and renamed patch title
>
> Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
> Acked-by: Andi Kleen <ak@linux.intel.com>
> Reviewed-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
> ---
> mm/memory.c | 17 +++++++++++++++--
> mm/migrate.c | 13 +++++++++++--
> 2 files changed, 26 insertions(+), 4 deletions(-)
...
> diff --git v3.11-rc3.orig/mm/migrate.c v3.11-rc3/mm/migrate.c
> index 3ec47d3..d313737 100644
> --- v3.11-rc3.orig/mm/migrate.c
> +++ v3.11-rc3/mm/migrate.c
> @@ -1092,7 +1092,11 @@ static struct page *new_page_node(struct page *p, unsigned long private,
>
> *result = &pm->status;
>
> - return alloc_pages_exact_node(pm->node,
> + if (PageHuge(p))
> + return alloc_huge_page_node(page_hstate(compound_head(p)),
> + pm->node);
> + else
> + return alloc_pages_exact_node(pm->node,
> GFP_HIGHUSER_MOVABLE | GFP_THISNODE, 0);
> }
>
> @@ -1152,6 +1156,11 @@ static int do_move_page_to_node_array(struct mm_struct *mm,
> !migrate_all)
> goto put_and_set;
>
> + if (PageHuge(page)) {
> + isolate_huge_page(page, &pagelist);
> + goto put_and_set;
> + }
This gives
In file included from mm/migrate.c:35:0:
mm/migrate.c: In function ‘do_move_page_to_node_array’:
include/linux/hugetlb.h:140:33: warning: statement with no effect [-Wunused-value]
#define isolate_huge_page(p, l) false
^
mm/migrate.c:1170:4: note: in expansion of macro ‘isolate_huge_page’
isolate_huge_page(page, &pagelist);
on a
# CONFIG_HUGETLBFS is not set
.config.
Thanks.
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
--
next prev parent reply other threads:[~2013-09-28 17:26 UTC|newest]
Thread overview: 36+ 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 ` [PATCH 1/9] migrate: make core migration code aware of hugepage Naoya Horiguchi
2013-09-10 13:51 ` Mel Gorman
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 ` [PATCH 3/9] migrate: add hugepage migration code to migrate_pages() Naoya Horiguchi
2013-08-14 23:41 ` Andrew Morton
2013-08-15 1:15 ` Naoya Horiguchi
2013-09-10 14:33 ` Mel Gorman
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
2013-09-28 17:26 ` Borislav Petkov [this message]
2013-09-30 15:01 ` Naoya Horiguchi
2013-09-30 16:04 ` Borislav Petkov
2013-09-30 16:08 ` Naoya Horiguchi
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 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 23:01 ` David Rientjes
2013-08-09 5:21 ` [PATCH 5/9] mbind: add hugepage migration code to mbind() Naoya Horiguchi
2013-09-10 14:41 ` Mel Gorman
2013-09-10 21:53 ` Naoya Horiguchi
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 ` [PATCH 7/9] memory-hotplug: enable memory hotplug to handle hugepage Naoya Horiguchi
2013-08-09 5:21 ` [PATCH 8/9] migrate: check movability of hugepage in unmap_and_move_huge_page() Naoya Horiguchi
2013-08-11 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
2013-08-11 17:43 ` Aneesh Kumar K.V
2013-08-12 18:10 ` Naoya Horiguchi
2013-09-10 14:48 ` Mel Gorman
2013-08-14 23:40 ` [PATCH v5 0/9] extend hugepage migration Andrew Morton
2013-08-15 6:23 ` Naoya Horiguchi
2013-08-15 19:39 ` Andrew Morton
2013-08-15 19:48 ` Naoya Horiguchi
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20130928172602.GA6191@pd.tnic \
--to=bp@alien8.de \
--cc=akpm@linux-foundation.org \
--cc=andi@firstfloor.org \
--cc=aneesh.kumar@linux.vnet.ibm.com \
--cc=dhillf@gmail.com \
--cc=hughd@google.com \
--cc=kosaki.motohiro@jp.fujitsu.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=liwanp@linux.vnet.ibm.com \
--cc=mgorman@suse.de \
--cc=mhocko@suse.cz \
--cc=n-horiguchi@ah.jp.nec.com \
--cc=nao.horiguchi@gmail.com \
--cc=riel@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).