Date: Mon, 9 Feb 2009 11:44:03 -0500 From: John Baldwin <jhb@freebsd.org> To: freebsd-current@freebsd.org Cc: Bruce Cran <bruce@cran.org.uk>, Hans Petter Selasky <hselasky@c2i.net> Subject: Re: "Fatal trap" when unloading usb2_controller_ehci Message-ID: <200902091144.03748.jhb@freebsd.org> In-Reply-To: <200902081026.22618.hselasky@c2i.net> References: <20090208001656.48a1a14d@gluon> <200902081026.22618.hselasky@c2i.net>
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On Sunday 08 February 2009 4:26:20 am Hans Petter Selasky wrote: > Hi, > > I don't think this is a USB problem. I rather think it has something to do > with the IRQ handler. On my box the EHCI IRQ is shared with the IRQ of the > graphics adapter, and when I unload the EHCI driver under X11 a couple of > times X11 freezes. This does not happen on the console. Perhaps try reverting Jeff's per-CPU IDT changes to see if it is related to that? It seems that the IDT handler was torn down, but that an APIC IRQ wasn't masked or some such. > --HPS > > On Sunday 08 February 2009, Bruce Cran wrote: > > Unloading usb2_controller_ehci is crashing FreeBSD on -CURRENT > > from a few days ago, resulting in a "Fatal trap" that isn't immediately > > fatal but ends up knocking out the rest of the system. > > > > Shortly after issuing a kldunload, the kernel drops into DDB with: > > > > Fatal trap 30: reserved (unknown) fault while in kernel mode > > cpuid = 0; apic id = 00 > > instruction pointer = 0x8 : 0xffffffff804bc646 > > stack pointer = 0x10: 0xfffffffe40023b70 > > frame pointer = 0x10: 0xfffffffe40023b80 > > code segment = base 0x0, limit 0xfffff, type 0x1b > > processor eflags = interrupt enabled, IOPL = 0 > > current process = 11 (idle : cpu0) > > [thread pid 11 tid 100004] > > Stopped at acpi_cpu_c1+0x6 : leave > > > > A backtrace just shows that the idle task was running at the time of > > the trap. Attempting to continue results in a load of "calcru: runtime > > went backwards" messages followed by the ATA driver dying with: > > > > WARNING - SETFEATURES SET TRANSFER MODE taskqueue timeout - completing > > request directly > > > > Then follows similar messages about SET_MULTI, ENABLE RCACHE, > > ENABLE_WCACHE and WRITE_DMA48 etc. > > > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" > -- John Baldwin
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