Processes get stuck in layerfs in NetBSD 6.99.28 i386

2013-12-06 Thread Aleksej Saushev
Hello, After updating to current I have problem that some processes get stuck on layerfs wchan. suggested that it may be have been fixed recently, but after updating kernel to the source as of around 2013-12-06 05:00:05 MSK I still have the problem: $ ps -axo pid,wchan,command | awk '$2 == "la

Re: posix message queues and multiple receivers

2013-12-06 Thread David Holland
On Sat, Dec 07, 2013 at 12:02:02AM +, David Laight wrote: > I believe that the disk driver on the server selected the disk transfers > using the 'elevator' algorithm. Since the writes were for more or less > sequential sectors, as soon as they got out of sequence one of the write > requests

Re: posix message queues and multiple receivers

2013-12-06 Thread Johnny Billquist
On 2013-12-07 01:02, David Laight wrote: On Fri, Dec 06, 2013 at 06:08:23PM +0100, Johnny Billquist wrote: i see slowness from multiple clients when i run nfsd with just one thread. i've never seen the problem dsl has seen with a netbsd nfs server (only other problems! :-) I agree. I think i

Re: posix message queues and multiple receivers

2013-12-06 Thread David Laight
On Fri, Dec 06, 2013 at 06:08:23PM +0100, Johnny Billquist wrote: > > > >i see slowness from multiple clients when i run nfsd with just > >one thread. i've never seen the problem dsl has seen with a > >netbsd nfs server (only other problems! :-) > > I agree. I think it's nonsense. The idea that d

Re: posix message queues and multiple receivers

2013-12-06 Thread Johnny Billquist
On 2013-12-05 13:14, matthew green wrote: Run a single nfsd and it all works much better. On that basis should the NetBSD default be changed from -n 4? i definitely would object to such a change. i see slowness from multiple clients when i run nfsd with just one thread. i've never seen the