Date: Tue, 21 May 1996 15:20:42 +1000 From: Stephen Hocking <sysseh@devetir.qld.gov.au> To: "John S. Dyson" <toor@dyson.iquest.net> Cc: current@freebsd.org Subject: Re: Possible problem with new VM code? Message-ID: <199605210520.FAA21386@netfl15a.devetir.qld.gov.au> In-Reply-To: Your message of "Mon, 20 May 1996 18:53:01 EST." <199605202353.SAA01994@dyson.iquest.net>
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I actually managed to provoke a crash with DDB at the ready while the system was under heavy load! This is on different hardware (486/66, 16Mb with IDE, the old one was 486/66, 8Mb, 1542B + barracuda) & without the suggested alteration of splvm to be the same as splhigh) Mind you, it took two make worlds & running the quake binary to do it. The backtrace is as follows (note I've compiled the kernel with -O2 -m486) - panic: vm_page_activate: already active _vm_page_activate(f02291d0,660000,7fffffff,f01cfc80,208000) at _vm_page_activate+0x34 _vm_pageout_scan((f0bc1b0,9d7,7fffffff,1,80000000) at _vm_pageout_scan+0x1b3 _vm_pageout(f09090cf,f01794a9,f01bce4,efbfffac,f0106d31) at _vm_pageout+0x202 _kproc_start(f01bc1b0,204f00, 208000,0,1) at _kproc_start+0x35 main(with usual args) I'll try the suggested alteration of VM SPL levels. Stephen -- The views expressed above are not those of the Worker's Compensation Board of Queensland, Australia.
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