[Fwd: siis change]

[Alexander Motin]

James R. Van Artsdalen wrote:
> mav committed a change to SIIS so I tried it but still get the device
> hangs as before.  I should have sent that report here instead of to mav.

This change just fixes possible problem inside CAM, but it does nothing
to hardware.

> ch1 below connects to a port multiplier and ada3 is one of four disks
> behind ch1.
> 
> Does disk ada3 ever get reset, or the link between the port multiplier
> behind ch1 and ada3 ever get reinitialized?  I'm wondering if the port
> multiplier is the key.  I don't see any code to reset ada3 or at least
> stop/start its PHY link.

It is still not implemented. I am going to start working on it now.

> It takes about an hour for "zpool scrub" to hang.
> 
> -------- Original Message --------
> Subject: 	siis change
> Date: 	Thu, 08 Oct 2009 18:06:01 -0500
> From: 	James R. Van Artsdalen
> To: 	Alexander Motin
> 
> I see you dropped in a change to SIIS for timeout errors so I decided to
> give it a try.  It still hangs for me.
> 
> FreeBSD pygmy.housenet.jrv 9.0-CURRENT FreeBSD 9.0-CURRENT #1 r197866:
> Thu Oct  8 16:32:18 CDT 2009    
> root at pygmy.housenet.jrv:/usr/obj/usr/src/sys/GENERIC  amd64
> 
> I did a "zpool scrub" which was generally running at about 100 MB/s
> across six 2 TB disks in two port multiplier enclosures.
> 
> Here is that complete /var/log/messages.
> 
> Oct  8 17:47:54 pygmy kernel: siisch1: Timeout on slot 3
> Oct  8 17:47:54 pygmy kernel: siisch1: siis_timeout is 00000000 ss
> 00028308 rs 00028308 es 00000000 sts 80032000 serr 00000000
> Oct  8 17:47:54 pygmy kernel: siisch1: ready wait time=0ms
> Oct  8 17:47:54 pygmy kernel: siisch1: ready wait time=1ms
> Oct  8 17:47:54 pygmy kernel: (ada3:siisch1:0:2:0): Command timed out
> Oct  8 17:47:54 pygmy kernel: (ada3:siisch1:0:2:0): Retrying Command
> Oct  8 17:47:54 pygmy kernel: (ada3:siisch1:0:2:0): Request Requeued
> Oct  8 17:47:54 pygmy kernel: (ada3:siisch1:0:2:0): Retrying Command
> Oct  8 17:47:54 pygmy kernel: (ada3:siisch1:0:2:0): Request Requeued
> Oct  8 17:47:54 pygmy kernel: (ada3:siisch1:0:2:0): Retrying Command
> Oct  8 17:47:54 pygmy kernel: (ada3:siisch1:0:2:0): Request Requeued
> Oct  8 17:47:54 pygmy kernel: (ada3:siisch1:0:2:0): Retrying Command
> Oct  8 17:47:54 pygmy kernel: (ada3:siisch1:0:2:0): Request Requeued
> Oct  8 17:47:54 pygmy kernel: (ada3:siisch1:0:2:0): Retrying Command
> Oct  8 17:48:24 pygmy kernel: siisch1: Timeout on slot 29
> Oct  8 17:48:24 pygmy kernel: siisch1: siis_timeout is 00040000 ss
> 60000007 rs 60000007 es 00000000 sts 801d2000 serr 00000000
> Oct  8 17:48:24 pygmy kernel: siisch1: ready wait time=1ms
> Oct  8 17:48:24 pygmy kernel: siisch1: ready wait time=0ms
> Oct  8 17:48:24 pygmy kernel: (ada3:siisch1:0:2:0): Command timed out
> Oct  8 17:48:24 pygmy kernel: (ada3:siisch1:0:2:0): Retrying Command
> Oct  8 17:48:24 pygmy kernel: (ada3:siisch1:0:2:0): Request Requeued
> Oct  8 17:48:24 pygmy kernel: (ada3:siisch1:0:2:0): Retrying Command
> Oct  8 17:48:24 pygmy kernel: (ada3:siisch1:0:2:0): Request Requeued
> Oct  8 17:48:24 pygmy kernel: (ada3:siisch1:0:2:0): Retrying Command
> Oct  8 17:48:24 pygmy kernel: (ada3:siisch1:0:2:0): Request Requeued
> Oct  8 17:48:24 pygmy kernel: (ada3:siisch1:0:2:0): Retrying Command
> Oct  8 17:48:24 pygmy kernel: (ada3:siisch1:0:2:0): Request Requeued
> Oct  8 17:48:24 pygmy kernel: (ada3:siisch1:0:2:0): Retrying Command


-- 
Alexander Motin