Hi, On 2/13/2019 8:10 PM, Pintu Agarwal wrote:
OK thanks for your suggestions. sdm845-perf_defconfig did not work for me. The target did not boot.
Perf defconfig works fine. You need to enable serial console with below config added to perf defconfig. CONFIG_SERIAL_MSM_GENI_CONSOLE=y
However, disabling CONFIG_PANIC_ON_SCHED_BUG works, and I got a root shell at least.
But this seems to be a work around. I still get a back trace in kernel logs from many different places. So, it looks like there is some code in qualcomm specific drivers that is calling a sleeping method from invalid context. How to find that... If this fix is already available in latest version, please let me know.
Seems like interrupts are disabled when down_write_killable() is called. It's not the drivers that is calling the sleeping method which can be seen from the log. [ 22.140224] [<ffffff88b8ce65a8>] ___might_sleep+0x140/0x188 [ 22.145862] [<ffffff88b8ce6648>] __might_sleep+0x58/0x90 <--- [ 22.151249] [<ffffff88b9d43f84>] down_write_killable+0x2c/0x80 <--- [ 22.157155] [<ffffff88b8e53cd8>] setup_arg_pages+0xb8/0x208 <--- [ 22.162792] [<ffffff88b8eb7534>] load_elf_binary+0x434/0x1298 [ 22.168600] [<ffffff88b8e55674>] search_binary_handler+0xac/0x1f0 [ 22.174763] [<ffffff88b8e560ec>] do_execveat_common.isra.15+0x504/0x6c8 [ 22.181452] [<ffffff88b8e562f4>] do_execve+0x44/0x58 [ 22.186481] [<ffffff88b8c84030>] run_init_process+0x38/0x48 <--- [ 22.192122] [<ffffff88b9d3db1c>] kernel_init+0x8c/0x108 [ 22.197411] [<ffffff88b8c83f00>] ret_from_fork+0x10/0x50 > > This at least proves that there is no issue in core ipipe patches, and > I can proceed. I doubt the *IPIPE patches*. You said you removed the configs, but all code are not under IPIPE configs and as I see there are lots of changes to interrupt code in general with ipipe. So to actually confirm whether the issue is with qcom drivers or ipipe, please *remove ipipe patches (not just configs)* and boot. Also paste the full dmesg logs for these 2 cases(with and without ipipe). Thanks, Sai -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
