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From:   youling 257 <youling257@gmail.com>
Date:   Sat, 2 Nov 2019 13:41:08 +0800
Message-ID: <CAOzgRdaBukdDtCuYQe3wvAgtXmRrbtXcj6yD4bJvqO2xQmO+tA@mail.gmail.com>
Subject: Re: x86/boot: add ramoops.mem_size=1048576 boot parameter cause can't boot
To:     Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linux-efi@vger.kernel.org
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On my v891w, i add "memmap=3D1M!2047M ramoops.mem_size=3D1048576
ramoops.ecc=3D1 ramoops.mem_address=3D0x7ff00000
ramoops.console_size=3D16384 ramoops.ftrace_size=3D16384
ramoops.pmsg_size=3D16384 ramoops.record_size=3D32768" boot parameter,
[ 0.483935] printk: console [pstore-1] enabled
[ 0.484034] pstore: Registered ramoops as persistent store backend
[ 0.484121] ramoops: using 0x100000@0x7ff00000, ecc: 16

But on my ezpad 6 m4, i add "memmap=3D1M!4095M ramoops.mem_size=3D1048576
ramoops.ecc=3D1 ramoops.mem_address=3D0xfff00000
ramoops.console_size=3D16384 ramoops.ftrace_size=3D16384
ramoops.pmsg_size=3D16384 ramoops.record_size=3D32768" boot parameter, it
can't boot, stop at "boot command list", no anyting happen, no dmesg.
I test boot parameter one by one, just add ramoops.mem_size=3D1048576,
will cause can't boot.

youling 257 <youling257@gmail.com> =E4=BA=8E2019=E5=B9=B411=E6=9C=882=E6=97=
=A5=E5=91=A8=E5=85=AD =E4=B8=8A=E5=8D=8810:26=E5=86=99=E9=81=93=EF=BC=9A
>
> Ram map
>
> [ 0.000000] BIOS-provided physical RAM map:
> [ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000008efff] usable
> [ 0.000000] BIOS-e820: [mem 0x000000000008f000-0x000000000008ffff] ACPI N=
VS
> [ 0.000000] BIOS-e820: [mem 0x0000000000090000-0x000000000009ffff] usable
> [ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x000000001effffff] usable
> [ 0.000000] BIOS-e820: [mem 0x000000001f000000-0x00000000201fffff] reserv=
ed
> [ 0.000000] BIOS-e820: [mem 0x0000000020200000-0x00000000b6de7fff] usable
> [ 0.000000] BIOS-e820: [mem 0x00000000b6de8000-0x00000000b6e08fff] reserv=
ed
> [ 0.000000] BIOS-e820: [mem 0x00000000b6e09000-0x00000000ba608fff] usable
> [ 0.000000] BIOS-e820: [mem 0x00000000ba609000-0x00000000ba698fff] type 2=
0
> [ 0.000000] BIOS-e820: [mem 0x00000000ba699000-0x00000000baf18fff] reserv=
ed
> [ 0.000000] BIOS-e820: [mem 0x00000000baf19000-0x00000000bb018fff] ACPI N=
VS
> [ 0.000000] BIOS-e820: [mem 0x00000000bb019000-0x00000000bb058fff] ACPI d=
ata
> [ 0.000000] BIOS-e820: [mem 0x00000000bb059000-0x00000000bbffffff] usable
> [ 0.000000] BIOS-e820: [mem 0x00000000e0000000-0x00000000e3ffffff] reserv=
ed
> [ 0.000000] BIOS-e820: [mem 0x00000000fea00000-0x00000000feafffff] reserv=
ed
> [ 0.000000] BIOS-e820: [mem 0x00000000fec00000-0x00000000fec00fff] reserv=
ed
> [ 0.000000] BIOS-e820: [mem 0x00000000fed01000-0x00000000fed01fff] reserv=
ed
> [ 0.000000] BIOS-e820: [mem 0x00000000fed03000-0x00000000fed03fff] reserv=
ed
> [ 0.000000] BIOS-e820: [mem 0x00000000fed06000-0x00000000fed06fff] reserv=
ed
> [ 0.000000] BIOS-e820: [mem 0x00000000fed08000-0x00000000fed09fff] reserv=
ed
> [ 0.000000] BIOS-e820: [mem 0x00000000fed1c000-0x00000000fed1cfff] reserv=
ed
> [ 0.000000] BIOS-e820: [mem 0x00000000fed80000-0x00000000fedbffff] reserv=
ed
> [ 0.000000] BIOS-e820: [mem 0x00000000fee00000-0x00000000fee00fff] reserv=
ed
> [ 0.000000] BIOS-e820: [mem 0x00000000ffc00000-0x00000000ffffffff] reserv=
ed
> [ 0.000000] BIOS-e820: [mem 0x0000000100000000-0x000000013fffffff] usable
> [ 0.000000] NX (Execute Disable) protection: active
> [ 0.000000] efi: EFI v2.40 by INSYDE Corp.
> [ 0.000000] efi: ACPI 2.0=3D0xbb058014 SMBIOS=3D0xba6a9000 ESRT=3D0xba6ac=
918
> [ 0.000000] SMBIOS 2.8 present.
> [ 0.000000] DMI: jumper EZpad/EZpad, BIOS Jumper8.S106x.A00C.1066 12/22/2=
015
> [ 0.000000] tsc: Detected 1440.000 MHz processor
> [ 0.000298] e820: update [mem 0x00000000-0x00000fff] usable =3D=3D> reser=
ved
> [ 0.000302] e820: remove [mem 0x000a0000-0x000fffff] usable
>
> youling 257 <youling257@gmail.com> =E4=BA=8E2019=E5=B9=B411=E6=9C=882=E6=
=97=A5=E5=91=A8=E5=85=AD =E4=B8=8A=E5=8D=8810:23=E5=86=99=E9=81=93=EF=BC=9A
> >
> > only add ramoops.mem_size=3D1048576 boot parameter cause can't boot on
> > my device, stop at booting command list, no anyting happen, no dmesg.
> >
> >