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Re: isp(4) annoying problems on PWS500au

Subject: Re: isp(4) annoying problems on PWS500au
From: Erik Fair
Date: Mon, 24 Nov 2008 21:02:02 UTC
Newsgroups: fa.netbsd.ports.alpha


The real problem with this error message is that the kernel is braying about a temporary error that it recovers from. I've been seeing this on a DigitalServer 3305 (nee AlphaServer 800 5/500; a 500 MHz 21164a system, originally with 500MB RAM, now with 2GB RAM) running NetBSD 3.1 for some years now - my primary NFS server. It first showed up when I created an FFS on a striped CCD with 64k blocks, and reducing to 32k blocks didn't help.

My read of the code involved is that the isp(4) driver is making a few too many requests of the bus_space or bus_dma code when I/O piles up (forgot which - I looked a very long time ago), and doesn't back off. I see these every day with CVS updates.

        Erik <fair@xxxxxxxxxx>


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