On 10/18/2016 09:26 AM, AKASHI Takahiro wrote: > Ruslan, > > On Mon, Oct 17, 2016 at 06:41:01PM +0300, Ruslan Bilovol wrote: >> Hi, >> >> On 09/07/2016 07:29 AM, AKASHI Takahiro wrote: >>> v26-specific note: After a comment from Rob[0], an idea of adding >>> "linux,usable-memory-range" was dropped. Instead, an existing >>> "reserved-memory" node will be used to limit usable memory ranges >>> on crash dump kernel. >>> This works not only on UEFI/ACPI systems but also on DT-only systems, >>> but if he really insists on using DT-specific "usable-memory" property, >>> I will post additional patches for kexec-tools. Those would be >>> redundant, though. >>> Even in that case, the kernel will not have to be changed. >>> >>> This patch series adds kdump support on arm64. >>> There are some prerequisite patches [1],[2]. >>> >>> To load a crash-dump kernel to the systems, a series of patches to >>> kexec-tools, which have not yet been merged upstream, are needed. >>> Please always use my latest kdump patches, v3 [3]. >>> >>> To examine vmcore (/proc/vmcore) on a crash-dump kernel, you can use >>> - crash utility (coming v7.1.6 or later) [4] >>> (Necessary patches have already been queued in the master.) >>> >>> >>> [0] http://lists.infradead.org/pipermail/linux-arm-kernel/2016-August/452582.html >>> [1] "arm64: mark reserved memblock regions explicitly in iomem" >>> http://lists.infradead.org/pipermail/linux-arm-kernel/2016-August/450433.html >>> [2] "efi: arm64: treat regions with WT/WC set but WB cleared as memory" >>> http://lists.infradead.org/pipermail/linux-arm-kernel/2016-August/451491.html >>> [3] T.B.D. >>> [4] https://github.com/crash-utility/crash.git >> Are you going to rebase your patch series onto v4.9-rc1 tag soon? I see > Yes, definitely as soon as possible! (actually I've done it.) > But before submitting a new version, I need to convince Rob (Herring) > that he would accept my old approach (v25) regarding specifying usable > memory for crash dump kernel: > http://lists.infradead.org/pipermail/linux-arm-kernel/2016-September/459379.html It looks like the patches got stuck on review. Could you please share that rebased version of kernel and kexec-tools (maybe even on Linaro private git repo), I'd like to try it on our HW while review is in progress. Thanks, Ruslan
