Hi Alexandre, Nick: On Wed, Oct 6, 2021 at 11:15 AM Alexandre Ghiti <alexandre.ghiti@xxxxxxxxxxxxx> wrote: > > Hi Nick, > > On Tue, Oct 5, 2021 at 4:07 PM Alexandre Ghiti > <alexandre.ghiti@xxxxxxxxxxxxx> wrote: > > > > On Tue, Oct 5, 2021 at 2:15 PM Nick Kossifidis <mick@xxxxxxxxxxxx> wrote: > > > > > > Hello all, > > > > > > I've uploaded my kexec-tools patches for riscv on github for > > > testing/review before sending them upstream. > > > https://github.com/riscv-collab/kexec-tools/tree/riscv > > > > > > Both kexec and kdump were tested on latest rv64 qemu, using for-next > > > branch with this patch applied: > > > https://patchwork.kernel.org/project/linux-riscv/patch/20211002122026.1451269-1-mick@xxxxxxxxxxxx/ > > > > > > > I'll test that asap and review your patch too. > > > > Thanks for your time Nick! > > > > Alex > > > > 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="$(cat > /proc/cmdline)" --initrd=/boot/initrd.img > Warning: No cmdline provided, using append string as cmdline > Warning: No dtb provided, using /sys/firmware/fdt > [ 1813.472671] INFO: task kworker/1:0:988 blocked for more than 120 seconds. > [ 1813.478751] Not tainted 5.15.0-rc1+ #15 > [ 1813.483110] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" > disables this message. > Could not find a free area of memory of 0x3000 bytes... > locate_hole failed I've finally spent some time debugging this, and found the fix: --- a/kexec/arch/riscv/kexec-riscv.c +++ b/kexec/arch/riscv/kexec-riscv.c @@ -120,7 +120,7 @@ int load_extra_segments(struct kexec_info *info, uint64_t kernel_base, initrd_base + initrd_size); dbgprintf("Base addr for initrd image: 0x%lX\n", initrd_base); - min_usable = initrd_base; + max_usable = initrd_base; } the initrd image has been put at end of memory space( from high address down to low address), for example, my case here: the crash memory: 0x90000000 - 0xA0000000 and the initrd base: 0x9F78F000 so, the max_usable address need to update > > I used the Ubuntu kernel, so this is pretty large: > -rwxrwxr-x 1 ubuntu ubuntu 277M Oct 5 15:47 vmlinux > -rw-r--r-- 1 root root 98M Sep 21 03:25 /boot/initrd.img > > Then if I don't load the initrd (I sometimes have the same warning as > above) I can at least kexec the new kernel but it fails to boot: > > ubuntu@ubuntu:~$ 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. > > > > Regards, > > > Nick > > > > > > _______________________________________________ > > > linux-riscv mailing list > > > linux-riscv@xxxxxxxxxxxxxxxxxxx > > > http://lists.infradead.org/mailman/listinfo/linux-riscv > > _______________________________________________ > linux-riscv mailing list > linux-riscv@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/linux-riscv _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
