On 4/7/2021 05:54, Corentin Labbe wrote:
Hello I try to do kexec on a cortina/gemini SoC. On a "normal" boot, kexec fail to find memory so I added crashkernel=8M to cmdline. (kernel size is ~6M). But now, kernel fail to reserve memory: Load Kern image from 0x30020000 to 0x800000 size 7340032 Booting Linux on physical CPU 0x0 Linux version 5.12.0-rc5-next-20210401+ (compile@Red) (armv7a-unknown-linux-gnueabihf-gcc (Gentoo 9.3.0-r2 p4) 9.3.0, GNU ld (Gentoo 2.34 p6) 2.34.0) #98 PREEMPT Wed Apr 7 14:14:08 CEST 2021 CPU: FA526 [66015261] revision 1 (ARMv4), cr=0000397f CPU: VIVT data cache, VIVT instruction cache OF: fdt: Machine model: Edimax NS-2502 Memory policy: Data cache writeback Zone ranges: Normal [mem 0x0000000000000000-0x0000000007ffffff] HighMem empty Movable zone start for each node Early memory node ranges node 0: [mem 0x0000000000000000-0x0000000007ffffff] Initmem setup node 0 [mem 0x0000000000000000-0x0000000007ffffff] crashkernel reservation failed - No suitable area found. Built 1 zonelists, mobility grouping on. Total pages: 32512 Kernel command line: console=ttyS0,19200n8 ip=dhcp crashkernel=8M Dentry cache hash table entries: 16384 (order: 4, 65536 bytes, linear) Inode-cache hash table entries: 8192 (order: 3, 32768 bytes, linear) mem auto-init: stack:off, heap alloc:off, heap free:off Memory: 119476K/131072K available (5034K kernel code, 579K rwdata, 1372K rodata, 3020K init, 210K bss, 11596K reserved, 0K cma-reserved, 0K highmem) SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 What can I do ? Thanks Regards _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
Hello Corentin, I see much larger crashkernel=xxM being shown here https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/admin-guide/kdump/kdump.rst and from many of my other searches. Here is an interesting article on kdump for ARM-32 https://kaiwantech.wordpress.com/2017/07/13/setting-up-kdump-and-crash-for-arm-32-an-ongoing-saga/ Here is the kernel command line reference https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/admin-guide/kernel-parameters.txt?h=v5.11#n732 I feel your frustrations too. -- Bruce _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
