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Re: [PATCH 4/4] x86/efi: Allocate a trampoline if needed in efi_free_boot_services()

From "H. Peter Anvin" <hpa@zytor.com>
Newsgroups linux.kernel
Subject Re: [PATCH 4/4] x86/efi: Allocate a trampoline if needed in efi_free_boot_services()
Date 2016-08-01 07:10 +0200
Message-ID <s1dEd-1XU-5@gated-at.bofh.it> (permalink)
References <rZjup-84c-3@gated-at.bofh.it> <rZjup-84c-15@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On 07/26/16 15:55, Andy Lutomirski wrote:
> +		/*
> +		 * Nasty quirk: if all sub-1MB memory is used for boot
> +		 * services, we can get here without having allocated the
> +		 * real mode trampoline.  It's too late to hand boot services
> +		 * memory back to the memblock allocator, so instead
> +		 * try to reclaim a single page if needed.
> +		 *

This comment makes no sense.  Nowhere is there a dependency on a single
page, and this refers to allocation, not reclaim...

	-hpa

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Thread

[PATCH 4.8? 0/4] Allow the trampoline to use EFI boot services RAM Andy Lutomirski <luto@kernel.org> - 2016-07-27 01:00 +0200
  [PATCH 4/4] x86/efi: Allocate a trampoline if needed in efi_free_boot_services() Andy Lutomirski <luto@kernel.org> - 2016-07-27 01:00 +0200
    Re: [PATCH 4/4] x86/efi: Allocate a trampoline if needed in  efi_free_boot_services() "H. Peter Anvin" <hpa@zytor.com> - 2016-08-01 07:10 +0200
      Re: [PATCH 4/4] x86/efi: Allocate a trampoline if needed in efi_free_boot_services() Andy Lutomirski <luto@amacapital.net> - 2016-08-02 20:30 +0200
  [PATCH 3/4] x86/boot: Rework reserve_real_mode() to allow multiple tries Andy Lutomirski <luto@kernel.org> - 2016-07-27 01:00 +0200
  Re: [PATCH 4.8? 0/4] Allow the trampoline to use EFI boot services  RAM Matt Fleming <matt@codeblueprint.co.uk> - 2016-07-31 23:40 +0200
    Re: [PATCH 4.8? 0/4] Allow the trampoline to use EFI boot services  RAM Matt Fleming <matt@codeblueprint.co.uk> - 2016-08-04 11:30 +0200

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