> From: Alexey Suslikov
> Date: Sat, 5 Sep 2015 08:49:17 + (UTC)
>
> Mark Kettenis xs4all.nl> writes:
>
> > RCS file: /cvs/src/sys/kern/subr_pool.c,v
>
>
>
> > kd.kd_waitok = ISSET(flags, PR_WAITOK);
>
>
>
> > + /*
> > +* XXX Until we can call msleep(9) without holding the
Mark Kettenis xs4all.nl> writes:
> RCS file: /cvs/src/sys/kern/subr_pool.c,v
> kd.kd_waitok = ISSET(flags, PR_WAITOK);
> + /*
> + * XXX Until we can call msleep(9) without holding the kernel
> + * lock.
> + */
> + if (ISSET(flags, PR_WAITOK))
It there a reason
At this stage we can actually avoid grabbing the lock in the default
pool backend allocator, as long as the PR_WAITOK flag isn't set. This
is safe because:
* The pmemrange allocator can be called without holding the kernel
lock.
* On pmap_direct architectures, we simply use the direct map to a
