Jens Axboe 917257daa0 io_uring: only test SQPOLL cpu after we've verified it
We currently call cpu_possible() even if we don't use the CPU. Move the
test under the SQ_AFF branch, which is the only place where we'll use
the value. Do the cpu_possible() test AFTER we've limited it to a max
of NR_CPUS. This avoids triggering the following warning:

WARNING: CPU: 1 PID: 7600 at include/linux/cpumask.h:121 cpu_max_bits_warn

if CONFIG_DEBUG_PER_CPU_MAPS is enabled.

While in there, also move the SQ thread idle period assignment inside
SETUP_SQPOLL, as we don't use it otherwise either.

Reported-by: syzbot+cd714a07c6de2bc34293@syzkaller.appspotmail.com
Fixes: 6c271ce2f1d5 ("io_uring: add submission polling")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-04-13 19:08:22 -06:00
..
2019-03-17 09:10:56 -07:00
2019-03-28 08:54:20 -07:00
2019-04-11 14:19:02 -07:00
2019-03-09 10:54:24 -08:00
\n
2019-03-07 09:01:33 -08:00
2019-03-15 13:42:53 -07:00
2019-03-12 14:46:26 -07:00
2018-11-30 14:56:14 -08:00
2018-08-17 16:20:28 -07:00
2018-09-29 22:47:48 -04:00
2018-10-29 14:29:58 -07:00
2019-03-01 17:24:48 -08:00
2019-03-07 18:32:01 -08:00
2019-03-08 14:48:40 -08:00
2019-03-18 10:44:48 -06:00
2019-01-30 17:44:07 -05:00
2019-02-07 16:38:35 +01:00