Date: Tue, 16 May 1995 14:32:26 PDT From: Bill Fenner <fenner@parc.xerox.com> To: current@FreeBSD.org Subject: "savecore" causes panic Message-ID: <95May16.143232pdt.49859@crevenia.parc.xerox.com>
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I have an old '486 with 32 megs of memory and a new AHA1542FC, running SNAP-950412. I panicked and dumped core and wanted to check out the core dump. There are two devices on the SCSI bus: aha0 is a 154xCF-2.01-VE.0: enabling mailbox and residuals aha0: reading board settings, dma=5 int=11 (bus speed defaulted) aha0 at 0x330-0x333 irq 11 drq 5 on isa (aha0:0:0): "QUANTUM P105S 910-10-94x A.3" is a type 0 fixed SCSI 1 sd0(aha0:0:0): Direct-Access 100MB (205075 512 byte sectors) (aha0:1:0): "CDC 94171-9 0045" is a type 0 fixed SCSI 1 sd1(aha0:1:0): Direct-Access 312MB (640584 512 byte sectors) Swap (aka dump) was on sd0b, I was trying to savecore to /home/fenner, which is on sd1f. The first time I tried, I got a few messages like May 16 13:51:08 baobab /kernel: aha0: DMA beyond end Of ISA May 16 13:51:09 baobab /kernel: sd1: oops not queued May 16 13:51:09 baobab /kernel: biodone: buffer already done May 16 13:51:10 baobab /kernel: aha0: DMA beyond end Of ISA May 16 13:51:11 baobab /kernel: sd1: oops not queued May 16 13:51:11 baobab /kernel: biodone: buffer already done and presumably panicked, although since I have ddb configured and was running X, I couldn't tell. The second time, I ran fron the console, and didn't get any of the DMA errors, but did get: panic: vm_bounce_page_free: invalid bounce buffer (manually copied traceback follows) _vm_bounce_page_free(37f000,1) at _vm_bounce_page_free+0x50 _vm_bounce_free(f26d0b50) at _vm_bounce_free+0xa0 _biodone(f26d0b50,f0a22000,f08b0980,1,f0a22000) at _biodone+0x7f _scsi_done() _aha_done() _ahaintr() I would offer to provide a core file, but that might be difficult =) Any suggestions? (Hopefully it won't swap before I get this core file off of there.. mebbe I should just debug with the core file in swap space...) Note that I can "dd if=/dev/sd0b of=/home/fenner/corefile" just fine, but savecore very quickly causes this panic. Bill
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