Re: lfs_lock

[coypu%SDF.ORG@localhost]

On Thu, Jul 14, 2016 at 08:51:45PM +0000, Michael van Elst wrote:
> dholland-tech%netbsd.org@localhost (David Holland) writes:
> 
> >Is there any reason lfs is using a global (rather than per-volume)
> >lock? ad@ seems to have introduced it but as usual there's little in
> >the way of reasoning or explanation.
> 
> After changing lfs to use the new locking primitives it was utterly
> broken. So don't try to interpret much into the global lock. It's
> just a slightly more local version of the big kernel lock.
> 

Hmm, some users of KERNEL_LOCK still remain.
I think using both may be causing problems.
KERNEL_LOCK forces lfs_lock, but not all KERNEL_LOCK users check for
lfs_lock.

The one that does (lfs_cluster_aiodone), does it within KERNEL_LOCK,
not outside.