Date: Wed, 26 Jun 1996 09:22:01 +0200 (SAT) From: John Hay <jhay@mikom.csir.co.za> To: davidg@Root.COM Cc: dyson@freebsd.org, stable@freebsd.org Subject: Re: Another try at the vm_pageout.c -stable diff Message-ID: <199606260722.JAA03525@zibbi.mikom.csir.co.za> In-Reply-To: <199606260337.UAA00265@root.com> from David Greenman at "Jun 25, 96 08:37:52 pm"
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> Here is yet another diff. This is the product of a discussion I just had > with John about the nature of some of the performance problems people have > complained about. > This makes a slight change to the policy for bringing pages off of the > active queue and should make the statistics gather *much* more effective > in some cases. Please try it out and get back to us. Thanks! > > -DG > > David Greenman > Core-team/Principal Architect, The FreeBSD Project > > (This includes John's other changes, so apply this to a fresh -stable copy of > vm_pageout.c) > I'm not sure how relevant this still is. I see that there was a few commits during the night (well night for me here in SA). David I have tried your patch, but the kernel dies with "panic: unwire: page not in pmap" as soon as the machine starts to swap. It did not say anything more. I also tried the patch that John Dyson sent, but it also died. I have written down the essentials, but I did not get a coredump. | Fatal trap 12 page fault while in kernel mode | fva = 0x7be05bb0 | Supervisor write | ip = 0x8:0xf0186fa7 | The process running was top | nm kernel | sort produces: | f0186bd4 T _vm_map_lookup_done | f0186c00 T _vm_map_simplify | f0186d00 F vm_meter.o | f0186d00 T _vmmeter | f0186d60 T _loadav | f0186dd0 T _vm_sysctl | f0186eb0 T _vmtotal | f0187060 F vm_mmap.o | f0187068 T _sbrk | f0187074 T _sstk I am now running with just the "#if 0" changed to "#if 1" in vm_pageout.c and will see how it go. We are already swapping 40MB and it still looks good. John -- John Hay -- John.Hay@mikom.csir.co.za
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