On Fri, 2023-09-22 at 10:41 +0200, Johannes Berg wrote: > > > > Yes, but when does the fork actually happen? > > > > Looking further at this, now I'm confused as to why it doesn't happen > _all_ the time. > > I think this has pretty much always been wrong, just now we actually > notice it? > > Basically, when we create a new thread (really just mm I think), we say > the first thing that has to run there is fork_handler(), which > initialises things the first time around. This calls force_flush_all() > > But of course it's called from __schedule(), which has > preemption/interrupts disabled. So you can't do mmap_read_lock()? > > But I'm confused as to why it doesn't seem happen all the time? >
Haha, no, I'm an idiot - should've checked earlier. __might_resched() has a ratelimit on this print ... :) johannes _______________________________________________ linux-um mailing list linux-um@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-um
