Le Wed, Apr 07, 2021 at 07:13:04AM -0700, Bruce Mitchell a écrit : > 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. Hello Thanks but I have already read those documentation. I search to know why the kernel cannot find 8M of memory ouf of 128. Regards _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
