** Changed in: linux (Ubuntu)
Assignee: Colin Ian King (colin-king) => Krzysztof Kozlowski (krzk)
** Changed in: linux (Ubuntu)
Status: In Progress => Triaged
** Changed in: linux (Ubuntu)
Importance: High => Medium
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https://bugs.launchpad.net/bugs/1938048
Title:
5.13 RT kernel hangs on SMP shutdown
Status in linux package in Ubuntu:
Triaged
Bug description:
shutting down RT SMP 5.13 impish kernels in kvm-qemu is hanging in 1
in 20 or so reboots. gdb shows the hang is as follows:
#0 0xffffffff81044f72 in native_halt () at
/home/cking/rt-impish/impish/arch/x86/include/asm/irqflags.h:57
#1 stop_this_cpu (dummy=dummy@entry=0x0 <fixed_percpu_data>) at
/home/cking/rt-impish/impish/arch/x86/kernel/process.c:744
#2 0xffffffff8106f70c in __sysvec_reboot (regs=<optimized out>) at
/home/cking/rt-impish/impish/arch/x86/kernel/smp.c:138
#3 0xffffffff81c5f4f7 in sysvec_reboot (regs=0xffffffff82e03d78) at
/home/cking/rt-impish/impish/arch/x86/kernel/smp.c:134
#4 0xffffffff81e00e02 in asm_sysvec_reboot () at
/home/cking/rt-impish/impish/arch/x86/include/asm/idtentry.h:654
this gets stuck in:
asm volatile("hlt": : :"memory");
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