Date: Wed, 25 May 2005 08:08:41 -0700 From: John Pettitt <jpp@cloudview.com> To: freebsd-usb@freebsd.org Subject: i386/79169 as USB issue? Message-ID: <429494F9.80900@cloudview.com>
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Bug i386/79169 is beginning to look like a USB issue - http://www.freebsd.org/cgi/query-pr.cgi?pr=i386/79169 I rebuild the kernel with PREEMPTION defined and presto the bug no longer triggers. I'm guessing someplace there is a condition where the USB driver sleeps with a lock and the second USB disk causes a fatal embrace because the IRQ thread can't run without preemption. Reproduce the bug with a striped USB disk set and a loop running dbench 25 - it should fail in less than two hours if it's going to.
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