From: Marco Elver > Sent: 21 May 2021 10:48 > > On Fri, May 21, 2021 at 09:39AM +0000, David Laight wrote: > > From: Marco Elver > > > Sent: 21 May 2021 09:32 > > > > > > Since wait_event() uses TASK_UNINTERRUPTIBLE by default, waiting for an > > > allocation counts towards load. However, for KFENCE, this does not make > > > any sense, since there is no busy work we're awaiting. > > > > > > Instead, use TASK_IDLE via wait_event_idle() to not count towards load. > > > > Doesn't that let the process be interruptible by a signal. > > Which is probably not desirable. > > > > There really ought to be a way of sleeping with TASK_UNINTERRUPTIBLE > > without changing the load-average. > > That's what TASK_IDLE is: > > include/linux/sched.h:#define TASK_IDLE (TASK_UNINTERRUPTIBLE | TASK_NOLOAD) That's been added since I last tried to stop tasks updating the load-average :-) David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)
