All of lore.kernel.org
 help / color / mirror / Atom feed
From: Xishi Qiu <qiuxishi@huawei.com>
To: Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	"H. Peter Anvin" <hpa@zytor.com>
Cc: yeyunfeng <yeyunfeng@huawei.com>, Wenan Mao <maowenan@huawei.com>,
	Linux MM <linux-mm@kvack.org>,
	LKML <linux-kernel@vger.kernel.org>
Subject: [RFC] should BIOS change the efi type when we set CONFIG_X86_RESERVE_LOW ?
Date: Thu, 12 Apr 2018 09:49:59 +0800	[thread overview]
Message-ID: <5ACEBB47.3060300@huawei.com> (raw)

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
...

             reply	other threads:[~2018-04-12  1:50 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-12  1:49 Xishi Qiu [this message]
2018-04-23 10:17 ` [RFC] should BIOS change the efi type when we set CONFIG_X86_RESERVE_LOW ? Xishi Qiu

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=5ACEBB47.3060300@huawei.com \
    --to=qiuxishi@huawei.com \
    --cc=ard.biesheuvel@linaro.org \
    --cc=hpa@zytor.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=maowenan@huawei.com \
    --cc=mingo@redhat.com \
    --cc=tglx@linutronix.de \
    --cc=yeyunfeng@huawei.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.