Commit 10442994 authored by Jens Axboe's avatar Jens Axboe
Browse files

kernel: don't call do_exit() for PF_IO_WORKER threads 



Right now we're never calling get_signal() from PF_IO_WORKER threads, but
in preparation for doing so, don't handle a fatal signal for them. The
workers have state they need to cleanup when exiting, so just return
instead of calling do_exit() on their behalf. The threads themselves will
detect a fatal signal and do proper shutdown.

Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 90b87490

kernel/signal.c

+9 −1
Original line number Diff line number Diff line
@@ -2771,6 +2771,14 @@ bool get_signal(struct ksignal *ksig) 
			do_coredump(&ksig->info);

		}



		/*

		 * PF_IO_WORKER threads will catch and exit on fatal signals

		 * themselves. They have cleanup that must be performed, so

		 * we cannot call do_exit() on their behalf.

		 */

		if (current->flags & PF_IO_WORKER)

			goto out;



		/*

		 * Death signals, no core dump.

		 */
@@ -2778,7 +2786,7 @@ bool get_signal(struct ksignal *ksig) 
		/* NOTREACHED */

	}

	spin_unlock_irq(&sighand->siglock);



out:

	ksig->sig = signr;



	if (!(ksig->ka.sa.sa_flags & SA_EXPOSE_TAGBITS))