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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: Jens Axboe <axboe@kernel.dk>
rM2-mainline
Jens Axboe 2021-03-26 08:57:10 -06:00
parent 90b8749022
commit 10442994ba
1 changed files with 9 additions and 1 deletions
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10
kernel/signal.c
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@ -2771,6 +2771,14 @@ relock:
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 @@ relock:
/* NOTREACHED */
}
spin_unlock_irq(&sighand->siglock);
out:
ksig->sig = signr;
if (!(ksig->ka.sa.sa_flags & SA_EXPOSE_TAGBITS))