From: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: Xishi Qiu <qiuxishi@huawei.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
nao.horiguchi@gmail.com, Yinghai Lu <yinghai@kernel.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
mingo@elte.hu, Xiexiuqi <xiexiuqi@huawei.com>,
Hanjun Guo <guohanjun@huawei.com>,
"Luck, Tony" <tony.luck@intel.com>, Linux MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [RFC PATCH 10/12] mm: add the buddy system interface
Date: Wed, 10 Jun 2015 12:06:17 +0900 [thread overview]
Message-ID: <5577A9A9.7010108@jp.fujitsu.com> (raw)
In-Reply-To: <5576BA2B.6060907@huawei.com>
On 2015/06/09 19:04, Xishi Qiu wrote:
> On 2015/6/9 15:12, Kamezawa Hiroyuki wrote:
>
>> On 2015/06/04 22:04, Xishi Qiu wrote:
>>> Add the buddy system interface for address range mirroring feature.
>>> Allocate mirrored pages in MIGRATE_MIRROR list. If there is no mirrored pages
>>> left, use other types pages.
>>>
>>> Signed-off-by: Xishi Qiu <qiuxishi@huawei.com>
>>> ---
>>> mm/page_alloc.c | 40 +++++++++++++++++++++++++++++++++++++++-
>>> 1 file changed, 39 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
>>> index d4d2066..0fb55288 100644
>>> --- a/mm/page_alloc.c
>>> +++ b/mm/page_alloc.c
>>> @@ -599,6 +599,26 @@ static inline bool is_mirror_pfn(unsigned long pfn)
>>>
>>> return false;
>>> }
>>> +
>>> +static inline bool change_to_mirror(gfp_t gfp_flags, int high_zoneidx)
>>> +{
>>> + /*
>>> + * Do not alloc mirrored memory below 4G, because 0-4G is
>>> + * all mirrored by default, and the list is always empty.
>>> + */
>>> + if (high_zoneidx < ZONE_NORMAL)
>>> + return false;
>>> +
>>> + /* Alloc mirrored memory for only kernel */
>>> + if (gfp_flags & __GFP_MIRROR)
>>> + return true;
>>
>> GFP_KERNEL itself should imply mirror, I think.
>>
>
> Hi Kame,
>
> How about like this: #define GFP_KERNEL (__GFP_WAIT | __GFP_IO | __GFP_FS | __GFP_MIRROR) ?
>
Hm.... it cannot cover GFP_ATOMIC at el.
I guess, mirrored memory should be allocated if !__GFP_HIGHMEM or !__GFP_MOVABLE
thanks,
-Kame
Thanks,
-Kame
next prev parent reply other threads:[~2015-06-10 3:06 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-04 12:54 [RFC PATCH 00/12] mm: mirrored memory support for page buddy allocations Xishi Qiu
2015-06-04 12:56 ` [RFC PATCH 01/12] mm: add a new config to manage the code Xishi Qiu
2015-06-08 11:52 ` Leon Romanovsky
2015-06-08 15:14 ` Luck, Tony
2015-06-08 16:36 ` Leon Romanovsky
2015-06-09 6:44 ` Kamezawa Hiroyuki
2015-06-09 10:10 ` Xishi Qiu
2015-06-10 3:07 ` Kamezawa Hiroyuki
2015-06-04 12:57 ` [RFC PATCH 02/12] mm: introduce mirror_info Xishi Qiu
2015-06-04 16:57 ` Luck, Tony
2015-06-05 1:53 ` Xishi Qiu
2015-06-09 6:48 ` Kamezawa Hiroyuki
2015-06-04 12:58 ` [RFC PATCH 03/12] mm: introduce MIGRATE_MIRROR to manage the mirrored, pages Xishi Qiu
2015-06-09 6:54 ` Kamezawa Hiroyuki
2015-06-04 12:59 ` [RFC PATCH 04/12] mm: add mirrored pages to buddy system Xishi Qiu
2015-06-04 13:00 ` [RFC PATCH 05/12] mm: introduce a new zone_stat_item NR_FREE_MIRROR_PAGES Xishi Qiu
2015-06-04 13:01 ` [RFC PATCH 06/12] mm: add free mirrored pages info Xishi Qiu
2015-06-04 13:02 ` [RFC PATCH 07/12] mm: introduce __GFP_MIRROR to allocate mirrored pages Xishi Qiu
2015-06-09 7:01 ` Kamezawa Hiroyuki
2015-06-04 13:02 ` [RFC PATCH 08/12] mm: use mirrorable to switch allocate mirrored memory Xishi Qiu
2015-06-04 17:01 ` Luck, Tony
2015-06-04 18:41 ` Dave Hansen
2015-06-05 3:13 ` Xishi Qiu
2015-06-09 7:06 ` Kamezawa Hiroyuki
2015-06-09 10:09 ` Xishi Qiu
2015-06-10 3:09 ` Kamezawa Hiroyuki
2015-06-12 8:05 ` Naoya Horiguchi
2015-06-04 13:03 ` [RFC PATCH 09/12] mm: enable allocate mirrored memory at boot time Xishi Qiu
2015-06-04 13:04 ` [RFC PATCH 10/12] mm: add the buddy system interface Xishi Qiu
2015-06-04 17:09 ` Luck, Tony
2015-06-05 3:14 ` Xishi Qiu
2015-06-09 7:12 ` Kamezawa Hiroyuki
2015-06-09 10:04 ` Xishi Qiu
2015-06-10 3:06 ` Kamezawa Hiroyuki [this message]
2015-06-10 20:40 ` Luck, Tony
2015-06-15 8:47 ` Kamezawa Hiroyuki
2015-06-15 17:20 ` Luck, Tony
2015-06-16 0:31 ` Kamezawa Hiroyuki
2015-06-25 9:44 ` Xishi Qiu
2015-06-25 23:54 ` Kamezawa Hiroyuki
2015-06-26 1:43 ` Xishi Qiu
2015-06-26 8:34 ` Kamezawa Hiroyuki
2015-06-26 10:38 ` Xishi Qiu
2015-06-26 18:42 ` Luck, Tony
2015-06-04 13:04 ` [RFC PATCH 11/12] mm: add the PCP interface Xishi Qiu
2015-06-04 18:44 ` Dave Hansen
2015-06-04 13:05 ` [RFC PATCH 12/12] mm: let slab/slub/slob use mirrored memory Xishi Qiu
2015-06-04 17:14 ` Luck, Tony
2015-06-12 8:42 ` [RFC PATCH 00/12] mm: mirrored memory support for page buddy allocations Naoya Horiguchi
2015-06-12 9:09 ` Xishi Qiu
2015-06-12 19:03 ` Luck, Tony
2015-06-15 0:25 ` Naoya Horiguchi
2015-06-16 7:53 ` Vlastimil Babka
2015-06-16 8:17 ` Xishi Qiu
2015-06-16 9:46 ` Vlastimil Babka
2015-06-18 1:23 ` Xishi Qiu
2015-06-18 5:58 ` Vlastimil Babka
2015-06-18 9:37 ` Xishi Qiu
2015-06-18 9:55 ` Vlastimil Babka
2015-06-18 20:33 ` Luck, Tony
2015-06-19 1:36 ` Xishi Qiu
2015-06-19 18:42 ` Luck, Tony
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