Date: Mon, 3 May 2004 09:42:36 +0200 From: Burkard Meyendriesch <bm@malepartus.de> To: Bruce Evans <bde@zeta.org.au> Cc: atkin901@yahoo.com Subject: Re: sio: lots of silo overflows on Asus K8V with Moxa Smartio C104H/PCI solved Message-ID: <20040503094236.6b7dc4a5.bm@malepartus.de> In-Reply-To: <20040503145149.R3992@gamplex.bde.org> References: <20040426111754.38a855c4.bm@malepartus.de> <20040426233925.Y5300@gamplex.bde.org> <20040430102504.477152ce.bm@malepartus.de> <c6u3nd$f8q$1@sea.gmane.org> <20040501102705.7a7ec726.bm@malepartus.de> <20040501212314.N20783@gamplex.bde.org> <20040502195219.21874618.bm@malepartus.de> <20040503145149.R3992@gamplex.bde.org>
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On Mon, 3 May 2004 15:00:15 +1000 (EST) Bruce Evans wrote:
> On Sun, 2 May 2004, Burkard Meyendriesch wrote:
>
> > On Sat, 1 May 2004 21:41:27 +1000 (EST) Bruce Evans wrote:
> > > ...
> > > %%%
> > > Index: sio.c
> > > =================================================================
> > > == RCS file: /home/ncvs/src/sys/dev/sio/sio.c,v
> > > retrieving revision 1.428
> > > diff -u -2 -r1.428 sio.c
> > > --- sio.c 30 Apr 2004 21:16:52 -0000 1.428
> > > +++ sio.c 1 May 2004 11:29:44 -0000
> > > @@ -1164,5 +1302,6 @@
> > > if (ret) {
> > > ret = BUS_SETUP_INTR(device_get_parent(dev), dev,
> > > - com->irqres, INTR_TYPE_TTY,
> > > + com->irqres,
> > > + INTR_TYPE_CLOCK | INTR_MPSAFE,
> > > siointr, com, &com->cookie);
> > > if (ret == 0)
> > > %%%
> ...
>
> You need to turn PUC_FASTINTR back off to test the patch.
>
I disabled "options PUC_FASTINTR" in my kernel configuration file
and made a new kernel. The actual boot message is:
May 3 09:18:59 Reineke kernel: puc0: <Moxa Technologies, Smartio C104H/PCI> port 0xa000-0xa00f,0xa400-0xa43f,0xa800-0xa87f irq 19 at device 14.0 on pci0
May 3 09:18:59 Reineke kernel: puc0: Reserved 0x40 bytes for rid 0x18 type 4 at 0xa400
May 3 09:18:59 Reineke kernel: sio4: <Moxa Technologies, Smartio C104H/PCI> on puc0
May 3 09:18:59 Reineke kernel: sio4: type 16550A
May 3 09:18:59 Reineke kernel: sio4: unable to activate interrupt in fast mode - using normal mode
Doing my sio5 Palm backup test now I again get lots of silo overflows;
the input rate is in a range from 100 to 10000 chars/s and the puc
interrupt rate behaves similar: from 12 to 1200 ints/s. After several
minutes the Palm backup software gives up due to protocol errors
(maybe as a result of massive character losses).
If your patch only becomes effective without "options PUC_FASTINTR" it
does not seem to solve the sio interrupt problem in my environment.
Burkard
--
Burkard Meyendriesch
Stevern 2
D-48301 Nottuln
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