[lkml]   [2019]   [Dec]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v3] kernel/exit: do panic earlier to get coredump if global init task exit
On Thu, Dec 19, 2019 at 02:29:53PM +0800, wrote:
> From: chenqiwu <>
> When global init task get a chance to be killed, panic will happen in
> later calling steps by do_exit()->exit_notify()->forget_original_parent()
> ->find_child_reaper() if all init threads have exited.
> However, it's hard to extract the coredump of init task from a kernel
> crashdump, since exit_mm() has released its mm before panic. In order
> to get the backtrace of init task in userspace, it's better to do panic
> earlier at the beginning of exitting route.
> It's worth noting that we must take case of a multi-threaded init exitting
> issue. We need the test for is_global_init() && group_dead to ensure that
> it is all threads exiting and not just the current thread.
> Signed-off-by: chenqiwu <>

Acked-by: Christian Brauner <>

 \ /
  Last update: 2019-12-19 11:42    [W:0.072 / U:1.264 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site