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Date: Thu, 12 Apr 2018 09:49:59 +0800
From: Xishi Qiu <qiuxishi@huawei.com>
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To: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
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CC: yeyunfeng <yeyunfeng@huawei.com>, Wenan Mao <maowenan@huawei.com>,
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Subject: [RFC] should BIOS change the efi type when we set CONFIG_X86_RESERVE_LOW
 ?
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Hi, I find CONFIG_X86_RESERVE_LOW=64 in my system, so trim_low_memory_range()
will reserve low 64kb memory. But efi_free_boot_services() will free it to
buddy system again later because BIOS set the type to EFI_BOOT_SERVICES_CODE.

Here is the log:
...
efi: mem03: type=3, attr=0xf, range=[0x000000000000e000-0x0000000000010000) (0MB
...