From: zhong jiang <zhongjiang@huawei.com>
To: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: dan.j.williams@intel.com, hannes@cmpxchg.org, mhocko@suse.com,
linux-mm@kvack.org
Subject: Re: [PATCH] mm: respect pre-allocated storage mapping for memmap
Date: Tue, 17 Jan 2017 16:14:03 +0800 [thread overview]
Message-ID: <587DD24B.2000709@huawei.com> (raw)
In-Reply-To: <efc34702-7921-a91c-3002-691f083001d5@linux.vnet.ibm.com>
On 2017/1/16 22:43, Anshuman Khandual wrote:
> On 01/16/2017 07:08 PM, zhongjiang wrote:
>> From: zhong jiang <zhongjiang@huawei.com>
>>
>> At present, we skip the reservation storage by the driver for
>> the zone_dvice. but the free pages set aside for the memmap is
>> ignored. And since the free pages is only used as the memmap,
>> so we can also skip the corresponding pages.
> But these free pages used for memmap mapping should also be accounted
> inside the zone, no ?
That's confusing. because first_pfn for zone_device after reserve and free page for
memmap mapping. That is used as a actuallly pfn for zone_device.
Thanks
zhongjiang
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next prev parent reply other threads:[~2017-01-17 8:17 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-16 13:38 zhongjiang
2017-01-16 14:43 ` Anshuman Khandual
2017-01-17 8:14 ` zhong jiang [this message]
2017-01-17 10:25 ` Michal Hocko
2017-01-17 13:58 ` zhong jiang
2017-01-17 17:15 ` Dan Williams
2017-01-18 10:09 ` zhong jiang
2017-01-18 13:27 ` zhong jiang
2017-01-18 15:39 ` Dan Williams
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