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From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: Joonsoo Kim <iamjoonsoo.kim@lge.com>,
	Andrew Morton <akpm@linux-foundation.org>
Cc: Rik van Riel <riel@redhat.com>, Mel Gorman <mgorman@suse.de>,
	Michal Hocko <mhocko@suse.cz>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
	Hugh Dickins <hughd@google.com>,
	Davidlohr Bueso <davidlohr.bueso@hp.com>,
	David Gibson <david@gibson.dropbear.id.au>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	Joonsoo Kim <js1304@gmail.com>,
	Wanpeng Li <liwanp@linux.vnet.ibm.com>,
	Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
	Hillf Danton <dhillf@gmail.com>
Subject: Re: [PATCH v2 04/20] mm, hugetlb: remove useless check about mapping type
Date: Wed, 21 Aug 2013 15:00:24 +0530	[thread overview]
Message-ID: <87siy3gzm7.fsf@linux.vnet.ibm.com> (raw)
In-Reply-To: <1376040398-11212-5-git-send-email-iamjoonsoo.kim@lge.com>

Joonsoo Kim <iamjoonsoo.kim@lge.com> writes:

> is_vma_resv_set(vma, HPAGE_RESV_OWNER) implys that this mapping is
> for private. So we don't need to check whether this mapping is for
> shared or not.
>
> This patch is just for clean-up.
>
> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>

Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

>
> diff --git a/mm/hugetlb.c b/mm/hugetlb.c
> index ea1ae0a..c017c52 100644
> --- a/mm/hugetlb.c
> +++ b/mm/hugetlb.c
> @@ -2544,8 +2544,7 @@ retry_avoidcopy:
>  	 * at the time of fork() could consume its reserves on COW instead
>  	 * of the full address range.
>  	 */
> -	if (!(vma->vm_flags & VM_MAYSHARE) &&
> -			is_vma_resv_set(vma, HPAGE_RESV_OWNER) &&
> +	if (is_vma_resv_set(vma, HPAGE_RESV_OWNER) &&
>  			old_page != pagecache_page)
>  		outside_reserve = 1;
>
> -- 
> 1.7.9.5

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  parent reply	other threads:[~2013-08-21  9:30 UTC|newest]

Thread overview: 71+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-08-09  9:26 [PATCH v2 00/20] mm, hugetlb: remove a hugetlb_instantiation_mutex Joonsoo Kim
2013-08-09  9:26 ` [PATCH v2 01/20] mm, hugetlb: protect reserved pages when soft offlining a hugepage Joonsoo Kim
2013-08-12 13:20   ` Davidlohr Bueso
2013-08-09  9:26 ` [PATCH v2 02/20] mm, hugetlb: change variable name reservations to resv Joonsoo Kim
2013-08-12 13:21   ` Davidlohr Bueso
2013-08-09  9:26 ` [PATCH v2 03/20] mm, hugetlb: fix subpool accounting handling Joonsoo Kim
2013-08-21  9:28   ` Aneesh Kumar K.V
2013-08-22  6:50     ` Joonsoo Kim
2013-08-22  7:08       ` Aneesh Kumar K.V
2013-08-22  7:47         ` Joonsoo Kim
2013-08-26 13:01           ` Aneesh Kumar K.V
2013-08-27  7:40             ` Joonsoo Kim
2013-08-09  9:26 ` [PATCH v2 04/20] mm, hugetlb: remove useless check about mapping type Joonsoo Kim
2013-08-12 13:31   ` Davidlohr Bueso
2013-08-21  9:30   ` Aneesh Kumar K.V [this message]
2013-08-09  9:26 ` [PATCH v2 05/20] mm, hugetlb: grab a page_table_lock after page_cache_release Joonsoo Kim
2013-08-12 13:35   ` Davidlohr Bueso
2013-08-21  9:31   ` Aneesh Kumar K.V
2013-08-09  9:26 ` [PATCH v2 06/20] mm, hugetlb: return a reserved page to a reserved pool if failed Joonsoo Kim
2013-08-21  9:54   ` Aneesh Kumar K.V
2013-08-22  6:51     ` Joonsoo Kim
2013-08-09  9:26 ` [PATCH v2 07/20] mm, hugetlb: unify region structure handling Joonsoo Kim
2013-08-21  9:57   ` Aneesh Kumar K.V
2013-08-22  6:56     ` Joonsoo Kim
2013-08-21 10:22   ` Aneesh Kumar K.V
2013-08-22  6:53     ` Joonsoo Kim
2013-08-09  9:26 ` [PATCH v2 08/20] mm, hugetlb: region manipulation functions take resv_map rather list_head Joonsoo Kim
2013-08-21  9:58   ` Aneesh Kumar K.V
2013-08-09  9:26 ` [PATCH v2 09/20] mm, hugetlb: protect region tracking via newly introduced resv_map lock Joonsoo Kim
2013-08-12 22:03   ` Davidlohr Bueso
2013-08-13  7:45     ` Joonsoo Kim
2013-08-21 10:13   ` Aneesh Kumar K.V
2013-08-22  6:59     ` Joonsoo Kim
2013-08-09  9:26 ` [PATCH v2 10/20] mm, hugetlb: remove resv_map_put() Joonsoo Kim
2013-08-21 10:49   ` Aneesh Kumar K.V
2013-08-22  7:24     ` Joonsoo Kim
2013-08-09  9:26 ` [PATCH v2 11/20] mm, hugetlb: make vma_resv_map() works for all mapping type Joonsoo Kim
2013-08-21 10:37   ` Aneesh Kumar K.V
2013-08-22  7:25     ` Joonsoo Kim
2013-08-09  9:26 ` [PATCH v2 12/20] mm, hugetlb: remove vma_has_reserves() Joonsoo Kim
2013-08-22  8:44   ` Aneesh Kumar K.V
2013-08-22  9:17     ` Joonsoo Kim
2013-08-22 11:04       ` Aneesh Kumar K.V
2013-08-23  6:16         ` Joonsoo Kim
2013-08-09  9:26 ` [PATCH v2 13/20] mm, hugetlb: mm, hugetlb: unify chg and avoid_reserve to use_reserve Joonsoo Kim
2013-08-26 13:09   ` Aneesh Kumar K.V
2013-08-27  7:57     ` Joonsoo Kim
2013-08-09  9:26 ` [PATCH v2 14/20] mm, hugetlb: call vma_needs_reservation before entering alloc_huge_page() Joonsoo Kim
2013-08-26 13:36   ` Aneesh Kumar K.V
2013-08-26 13:46     ` Aneesh Kumar K.V
2013-08-27  7:58       ` Joonsoo Kim
2013-08-09  9:26 ` [PATCH v2 15/20] mm, hugetlb: remove a check for return value of alloc_huge_page() Joonsoo Kim
2013-08-26 13:38   ` Aneesh Kumar K.V
2013-08-09  9:26 ` [PATCH v2 16/20] mm, hugetlb: move down outside_reserve check Joonsoo Kim
2013-08-26 13:44   ` Aneesh Kumar K.V
2013-08-09  9:26 ` [PATCH v2 17/20] mm, hugetlb: move up anon_vma_prepare() Joonsoo Kim
2013-08-26 14:09   ` Aneesh Kumar K.V
2013-08-09  9:26 ` [PATCH v2 18/20] mm, hugetlb: clean-up error handling in hugetlb_cow() Joonsoo Kim
2013-08-26 14:12   ` Aneesh Kumar K.V
2013-08-09  9:26 ` [PATCH v2 19/20] mm, hugetlb: retry if failed to allocate and there is concurrent user Joonsoo Kim
2013-09-04  8:44   ` Joonsoo Kim
2013-09-05  1:16     ` David Gibson
2013-09-05  1:15   ` David Gibson
2013-09-05  5:43     ` Joonsoo Kim
2013-09-16 12:09       ` David Gibson
2013-09-30  7:47         ` Joonsoo Kim
2013-12-09 16:36           ` Davidlohr Bueso
2013-12-10  8:32             ` Joonsoo Kim
2013-08-09  9:26 ` [PATCH v2 20/20] mm, hugetlb: remove a hugetlb_instantiation_mutex Joonsoo Kim
2013-08-14 23:22 ` [PATCH v2 00/20] " Andrew Morton
2013-08-16 17:18   ` JoonSoo Kim

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