From: dyoung@redhat.com (Dave Young)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 18/19] arm64: kdump: update a kernel doc
Date: Wed, 20 Jan 2016 15:00:44 +0800 [thread overview]
Message-ID: <20160120070044.GF2999@dhcp-128-65.nay.redhat.com> (raw)
In-Reply-To: <20160120063856.GA3725@dhcp-128-65.nay.redhat.com>
> > So I'm not still sure about what are advantages of a property under /chosen
> > over "memmap=" kernel parameter.
> > Both are simple and can have the same effect with minimizing changes to dtb.
> > (But if, in the latter case, we have to provide *all* the memory-related information
> > through "memmap=" parameters, it would be much complicated.)
>
> Maybe I did not say it clearly, I prefer kexec syscall/tool to modifiy dtb
> or uefi-memmap so that we do not need any extra kernel cmdline.
>
> For x86 we would like to drop the memmap= usage in kexec-tools but we can not
> do that for a compatibility problem about calgary iommu. So that currently
> kexec-tools supports both recreating E820 maps and passing memmap=.
>
> We should think it carefully because it will be hard to remove once we support it.
> IMO handling it in code is better than using an external interface.
>
Also seems semantic of memmap=exactmap is different than current use in the implementation
exactmap means we need pass each range seperately including reserved, acpi and other types
We can not reuse ranges in uefi memmap for other than usable memory.
It will also have the cmdline array size issue.
Thanks
Dave
next prev parent reply other threads:[~2016-01-20 7:00 UTC|newest]
Thread overview: 87+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-15 19:18 [PATCH 00/19] arm64 kexec kernel patches v13 Geoff Levand
2016-01-15 19:18 ` [PATCH 02/19] arm64: kernel: Include _AC definition in page.h Geoff Levand
2016-01-18 10:05 ` Mark Rutland
2016-01-15 19:18 ` [PATCH 08/19] Revert "arm64: mm: remove unused cpu_set_idmap_tcr_t0sz function" Geoff Levand
2016-01-15 19:18 ` [PATCH 01/19] arm64: Fold proc-macros.S into assembler.h Geoff Levand
2016-01-15 19:18 ` [PATCH 07/19] arm64: Add back cpu_reset routines Geoff Levand
2016-01-15 19:18 ` [PATCH 04/19] arm64: Cleanup SCTLR flags Geoff Levand
2016-01-15 20:07 ` Mark Rutland
2016-01-18 10:12 ` Marc Zyngier
2016-01-19 11:59 ` Dave Martin
2016-01-25 15:09 ` James Morse
2016-01-15 19:18 ` [PATCH 06/19] arm64: Add new hcall HVC_CALL_FUNC Geoff Levand
2016-01-15 19:18 ` [PATCH 03/19] arm64: Add new asm macro copy_page Geoff Levand
2016-01-20 14:01 ` James Morse
2016-01-15 19:18 ` [PATCH 09/19] Revert "arm64: remove dead code" Geoff Levand
2016-01-15 19:55 ` Mark Rutland
2016-01-20 21:18 ` Geoff Levand
2016-01-15 19:18 ` [PATCH 05/19] arm64: Convert hcalls to use HVC immediate value Geoff Levand
2016-01-15 19:18 ` [PATCH 11/19] arm64/kexec: Add core kexec support Geoff Levand
2016-01-15 19:18 ` [PATCH 18/19] arm64: kdump: update a kernel doc Geoff Levand
2016-01-15 20:16 ` Mark Rutland
2016-01-18 10:26 ` AKASHI Takahiro
2016-01-18 11:29 ` Mark Rutland
2016-01-19 5:31 ` AKASHI Takahiro
2016-01-19 12:10 ` Mark Rutland
2016-01-20 4:34 ` AKASHI Takahiro
2016-01-19 1:43 ` Dave Young
2016-01-19 1:50 ` Dave Young
2016-01-19 5:35 ` AKASHI Takahiro
2016-01-19 12:28 ` Dave Young
2016-01-19 12:51 ` Mark Rutland
2016-01-19 13:45 ` Dave Young
2016-01-19 14:01 ` Mark Rutland
2016-01-20 2:49 ` Dave Young
2016-01-20 6:07 ` AKASHI Takahiro
2016-01-20 6:38 ` Dave Young
2016-01-20 7:00 ` Dave Young [this message]
2016-01-20 8:01 ` AKASHI Takahiro
2016-01-20 8:26 ` Dave Young
2016-01-20 11:54 ` Mark Rutland
2016-01-21 2:57 ` Dave Young
2016-01-21 3:03 ` Dave Young
2016-01-20 11:49 ` Mark Rutland
2016-01-21 6:53 ` AKASHI Takahiro
2016-01-21 12:02 ` Mark Rutland
2016-01-22 6:23 ` AKASHI Takahiro
2016-01-22 11:13 ` Mark Rutland
2016-02-02 5:18 ` AKASHI Takahiro
2016-01-25 3:19 ` Dave Young
2016-01-25 4:23 ` Dave Young
2016-01-20 11:28 ` Mark Rutland
2016-01-21 2:54 ` Dave Young
2016-01-20 5:25 ` AKASHI Takahiro
2016-01-20 12:02 ` Mark Rutland
2016-01-20 12:36 ` Mark Rutland
2016-01-20 14:59 ` Ard Biesheuvel
2016-01-20 15:04 ` Mark Rutland
2016-01-21 5:43 ` AKASHI Takahiro
2016-01-21 13:02 ` Mark Rutland
2016-01-19 12:17 ` Mark Rutland
2016-01-19 13:52 ` Dave Young
2016-01-19 14:05 ` Mark Rutland
2016-01-20 2:54 ` Dave Young
2016-01-15 19:18 ` [PATCH 17/19] arm64: kdump: enable kdump in the arm64 defconfig Geoff Levand
2016-01-15 19:18 ` [PATCH 12/19] arm64/kexec: Enable kexec " Geoff Levand
2016-01-15 19:18 ` [PATCH 15/19] arm64: kdump: implement machine_crash_shutdown() Geoff Levand
2016-01-15 19:18 ` [PATCH 14/19] arm64: kdump: reserve memory for crash dump kernel Geoff Levand
2016-01-15 19:18 ` [PATCH 10/19] arm64: kvm: allows kvm cpu hotplug Geoff Levand
2016-01-26 17:42 ` James Morse
2016-01-27 7:37 ` AKASHI Takahiro
2016-01-15 19:18 ` [PATCH 19/19] arm64: kdump: relax BUG_ON() if more than one cpus are still active Geoff Levand
2016-01-15 19:18 ` [PATCH 16/19] arm64: kdump: add kdump support Geoff Levand
2016-01-21 14:17 ` James Morse
2016-01-22 4:50 ` AKASHI Takahiro
2016-01-15 19:18 ` [PATCH 13/19] arm64/kexec: Add pr_debug output Geoff Levand
2016-01-19 12:32 ` [PATCH 00/19] arm64 kexec kernel patches v13 Dave Young
2016-01-20 0:15 ` Geoff Levand
2016-01-20 2:56 ` Dave Young
2016-01-20 21:15 ` Geoff Levand
2016-01-21 12:11 ` Mark Rutland
[not found] ` <c7575f853ccc491bb0212e025aab1cc9@NASANEXM01H.na.qualcomm.com>
2016-03-01 17:54 ` Azriel Samson
2016-03-02 1:17 ` Geoff Levand
2016-03-02 1:38 ` Will Deacon
2016-03-02 2:28 ` AKASHI Takahiro
2016-03-02 8:07 ` Marc Zyngier
2016-03-02 12:33 ` Pratyush Anand
2016-03-02 16:51 ` Azriel Samson
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