Re: in_compat_syscall() returns from kernel thread for X86_32.

From: Al Viro
Date: Wed Oct 17 2018 - 22:51:14 EST

On Wed, Oct 17, 2018 at 07:37:42PM -0700, Andy Lutomirski wrote:

> I could get on board with:
> ({WARN_ON_ONCE(current->flags & PF_KTHREAD); true})
> The point of these accessors is to be used *in a syscall*.
> What on Earth is Lustre doing that makes it have this problem?

Plays with timestamps from a kernel thread, perhaps?
See the old .su joke about adenoidectomy with rectal access
for possible reasons for doing it that way...