Re: [Crash-utility] [PATCH] Fix warning: multiple active tasks have called die

> The current stack pointer is 9d7d3768 and the stack area is > [9d7d3768 - 9d7d4000]: > > crash> bt -t | grep die > [ 9d7d38b8] die at 100f26 > [ 9d7d3988] die at 100f26 > [ 9d7d3a40] die at 100ee6 > [ 9d7d3a90] die at 100f26 > > crash> rd 9d7d38b8 > 9d7d38b8: 0000000000100f26 .......& > crash> rd 9d7d3988 > 9d7d3988: 0000000000100f26 .......& > crash> rd 9d7d3a40 > 9d7d3a40: 0000000000100ee6 ........ > crash> rd 9d7d3a90 > 9d7d3a90: 0000000000100f26 .......& Given that the kernel cannot return from die() if panic_on_oops is set, and given the s390's PAGE_OFFSET of 0, I wonder if those values of 100f26 and 100ee6 possibly just fall into die()'s address range by "dumb luck", but have other uses/meanings? If you disassemble the die() function, you could at least verify whether they are return addresses or not.

> #0 [9d7d37a8] __machine_kexec at 11d4fa > #1 [9d7d37f0] smp_switch_to_ipl_cpu at 116ebe > #2 [9d7d3860] machine_kexec at 11d49c > #3 [9d7d3890] crash_kexec at 19ab26 > #4 [9d7d3960] panic at 5af192 > #5 [9d7d3a08] die at 100f26 > #6 [9d7d3a70] do_no_context at 11e910 > #7 [9d7d3aa8] do_protection_exception at 5b551a > #8 [9d7d3bc0] pgm_exit at 5b34b8 > PSW: 0404100180000000 0000000000402d04 (sysrq_handle_crash+16) > GPRS: 0000000000010000 00000000009c8c74 0000000000000001 0000000000000000 > 00000000005af34e 00000000009c90e4 000000000091d3b0 0000000000a67960 > 070000000016b628 0000000000000001 0000000000959530 0000000000000063 > 00000000009596d0 0000000000606c60 000000000040309c 000000009d7d3d08 > #0 [9d7d3d70] process_one_work at 166abe > #1 [9d7d3dd8] worker_thread at 1672da > #2 [9d7d3e50] kthread at 1705b6 > #3 [9d7d3eb8] kernel_thread_starter at 5b2e3a