Date: Mon, 15 Jan 2001 11:47:16 -0800 (PST) From: John Baldwin <jhb@FreeBSD.org> To: Garance A Drosihn <drosih@rpi.edu> Cc: current@FreeBSD.org, Jordan Hubbard <jkh@winston.osd.bsdi.com> Subject: RE: Anybody else seeing a broken /dev/lpt with SMP on -current? Message-ID: <XFMail.010115114716.jhb@FreeBSD.org> In-Reply-To: <p05001902b686ad0d2404@[128.113.24.47]>
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On 14-Jan-01 Garance A Drosihn wrote: > At 6:55 PM -0800 1/12/01, John Baldwin wrote: >>On 13-Jan-01 Jordan Hubbard wrote: >> > If anybody wants a fuller traceback then I'll compile up a kernel >> > with debugging symbols, but it's going to be pretty sparse anyway >> > since it basically only shows the trap() from the page fault and >> > the subsequent panic. >> >>All the other traces show the kernel having returned to an address >>that is beyond the end of the kernel (which causes the page fault) >>meaning that the stack is fubar'd, so the trace isn't meaningful >>anyways. :( Knowing how and why the lpd interrupt handler trashes >>the stack is the useful info, and with the stack already trashed, >>I don't know of an easy way to figure that out. > > Do you really mean the "lpd interrupt handler", or do you mean > the "lpt interrupt handler"? Does this problem only happen when > lpd is sending data thru /dev/lpt? lpt interrupt handler, yes. -- John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.baldwin.cx/~john/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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