On Sat, Oct 9, 2021 at 3:25 PM Nick Kossifidis <mick@xxxxxxxxxxxx> wrote: > > Στις 2021-10-06 14:10, Alexandre Ghiti έγραψε: > > > > So I followed the instructions here: > > https://documentation.suse.com/fr-fr/sles/12-SP3/html/SLES-all/cha-tuning-kexec.html#cha-tuning-kexec-basic-usage, > > below the output on an Unmatched board using a vmlinux stored on a sd > > card: > > > > ubuntu@ubuntu:~$ sudo sbin/kexec -l vmlinux --append="$(cat > > /proc/cmdline)" --initrd=/boot/initrd.img > > Warning: No cmdline provided, using append string as cmdline > > Warning: No dtb provided, using /sys/firmware/fdt > > [ 1813.472671] INFO: task kworker/1:0:988 blocked for more than 120 > > seconds. > > [ 1813.478751] Not tainted 5.15.0-rc1+ #15 > > [ 1813.483110] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" > > disables this message. > > Could not find a free area of memory of 0x3000 bytes... > > locate_hole failed > > > > I used the Ubuntu kernel, so this is pretty large: > > -rwxrwxr-x 1 ubuntu ubuntu 277M Oct 5 15:47 vmlinux > > -rw-r--r-- 1 root root 98M Sep 21 03:25 /boot/initrd.img > > > > ACK, I haven't tested initrd much TBH, I usually don't use an initrd, > and when I do it's a small busybox-based rootfs. > > > Then if I don't load the initrd (I sometimes have the same warning as > > above) I can at least kexec the new kernel but it fails to boot: > > > > ubuntu@ubuntu:~$ sudo ./sbin/kexec -e > > Warning: No cmdline or append string provided > > Warning: No dtb provided, using /sys/firmware/fdt > > [...] > > [ 0.000000] SBI v0.2 HSM extension detected > > [ 0.000000] CPU with hartid=0 is not available > > [ 0.000000] ------------[ cut here ]------------ > > [ 0.000000] kernel BUG at arch/riscv/kernel/smpboot.c:107! > > [ 0.000000] Kernel BUG [#1] > > [ 0.000000] Modules linked in: > > [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 5.15.0-rc1+ #15 > > [ 0.000000] Hardware name: SiFive HiFive Unmatched A00 (DT) > > [ 0.000000] epc : setup_smp+0xcc/0x142 > > [ 0.000000] ra : setup_smp+0xc4/0x142 > > [ 0.000000] epc : ffffffff80a04080 ra : ffffffff80a04078 sp : > > ffffffff81803ec0 > > [ 0.000000] gp : ffffffff81a23220 tp : ffffffff81810500 t0 : > > ffffffff81a3551f > > [ 0.000000] t1 : ffffffffffffffff t2 : 0000000000000000 s0 : > > ffffffff81803f00 > > [ 0.000000] s1 : 0000000000000000 a0 : 0000000000000000 a1 : > > 0000000000000000 > > [ 0.000000] a2 : 0000000000000000 a3 : 0000000000000001 a4 : > > 0000000000000000 > > [ 0.000000] a5 : ffffffff80c64500 a6 : 0000000000000004 a7 : > > 000000000000ff00 > > [ 0.000000] s2 : 0000000000000005 s3 : 0000000000000000 s4 : > > ffffffff8118f9a8 > > [ 0.000000] s5 : 0000000000000007 s6 : ffffffff80c0b790 s7 : > > 0000000080000200 > > [ 0.000000] s8 : 0000000000000fff s9 : 0000000081000200 s10: > > 0000000000000018 > > [ 0.000000] s11: 000000000000000b t3 : 0000000000ff0000 t4 : > > ffffffffffffffff > > [ 0.000000] t5 : ffffffff80c0b7a0 t6 : ffffffff81803bd8 > > [ 0.000000] status: 0000000200000100 badaddr: 0000000000000000 > > cause: 0000000000000003 > > [ 0.000000] [<ffffffff80a04080>] setup_smp+0xcc/0x142 > > [ 0.000000] [<ffffffff80a03d88>] setup_arch+0x56a/0x590 > > [ 0.000000] [<ffffffff80a00aa2>] start_kernel+0xaa/0xa5c > > [ 0.000000] random: get_random_bytes called from > > oops_exit+0x44/0x70 with crng_init=0 > > [ 0.000000] ---[ end trace 0000000000000000 ]--- > > [ 0.000000] Kernel panic - not syncing: Attempted to kill the idle > > task! > > [ 0.000000] ---[ end Kernel panic - not syncing: Attempted to kill > > the idle task! ]--- > > > > This reliably fails here. > > > > This looks weird, I'll check it out (we have an unmatched here so I'll > try to get my hands on it sometime next week). > > Did you try kdump ? Do you get the same error ? kdump works fine, it fails to find the rootfs but I think my setup is faulty here. I took a quick look at kexec_relocate.S, and the use of va_pa_offset is also wrong here, we should use va_kernel_pa_offset as it is used to modify a text address But fixing that did not work either. Alex > > BTW this is what I use for testing most of the time: > > For kexec: > kexec -l /mnt/shared/vmlinux --reuse-cmdline > kexec -e > > For kdump: > kexec -p /mnt/shared/vmlinux > echo c > /proc/sysrq-trigger > > Thanks a lot for your time ! > > Regards, > Nick _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
