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C programming question
by pmills-5bG9SNWDbRX3fQ9qLvQP4Q＠public.gmane.org 19 Dec '03

19 Dec '03

On Friday, December 19, 2003, at 08:18 AM, John Wildberger wrote: > Is it possible to > create a file that is located starting at such a specific address? Do you actually need it to act like a file or are you OK with just reading as if it were an array or struct address? ........................ Phillip Mills Multi-platform software development (416) 224-0714 -- The Toronto Linux Users Group. Meetings: http://tlug.ss.org TLUG requests: Linux topics, No HTML, wrap text below 80 columns How to UNSUBSCRIBE: http://tlug.ss.org/subscribe.shtml

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C programming question
by wildberger-iRg7kjdsKiH3fQ9qLvQP4Q＠public.gmane.org 19 Dec '03

19 Dec '03

On December 19, 2003 01:26 pm, Jing Su wrote: > Still not sure exactly what you're looking for, but a few hints.... > > Well, the OS separates the address space of different processes, so there > is more work involved in sharing memory across different processes. > > But, you can always point to any virtual address you want by setting a > void pointer to some address. For example, you could do: > void* foo = 0xA0000000; > and write directly to that hex address (use with caution). > > You can map files to memory using the mmap function... (do a man mmap). > > -Jing Thanks for your speedy reply. I will try to work with this. Thanks John -- The Toronto Linux Users Group. Meetings: http://tlug.ss.org TLUG requests: Linux topics, No HTML, wrap text below 80 columns How to UNSUBSCRIBE: http://tlug.ss.org/subscribe.shtml

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Hello Every One
by taavi-LbuTpDkqzNzXI80/IeQp7B2eb7JE58TQ＠public.gmane.org 19 Dec '03

19 Dec '03

On Fri, Dec 19, 2003 at 12:55:58PM -0500, Stephen Oulton wrote: > Maybe it is because the install crashed and I had to make it work with > my limited experience. I tried to install it 3 times and it crashed > during install every time. > > I even formated the drive and tried a clean install and it still crashed > on install. One might become suspicous of your hardware at this point. NetBSD was kinda jerky on my Duron due to some incompatibility between it and my HD controller. I think that it's NetBSD's fault, but what was really relevant is that it was downgrading to some PIO mode for HD access. That's a great way to make the computer very slow, and the mouse jerky. What hardware are you running? -- taa "I wish I were a glow worm/A glow worm's never glum Cos how can you be grumpy/When the sun shines out your bum?" /*eof*/ -- The Toronto Linux Users Group. Meetings: http://tlug.ss.org TLUG requests: Linux topics, No HTML, wrap text below 80 columns How to UNSUBSCRIBE: http://tlug.ss.org/subscribe.shtml

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C programming question
by jingsu-26n5VD7DAF2Tm46uYYfjYg＠public.gmane.org 19 Dec '03

19 Dec '03

Still not sure exactly what you're looking for, but a few hints.... Well, the OS separates the address space of different processes, so there is more work involved in sharing memory across different processes. But, you can always point to any virtual address you want by setting a void pointer to some address. For example, you could do: void* foo = 0xA0000000; and write directly to that hex address (use with caution). You can map files to memory using the mmap function... (do a man mmap). -Jing On Fri, 19 Dec 2003, John Wildberger wrote: > Date: Fri, 19 Dec 2003 08:18:38 -0500 > From: John Wildberger <wildberger-iRg7kjdsKiH3fQ9qLvQP4Q at public.gmane.org> > Reply-To: tlug-lxSQFCZeNF4 at public.gmane.org > To: tlug-lxSQFCZeNF4 at public.gmane.org > Subject: [TLUG]: C programming question > > To open a file for reading precludes to know the filename. I would like to > read information from specific absolute RAM addresses. Is it possible to > create a file that is located starting at such a specific address?. Any > suggestion on how to do this? > John > -- > The Toronto Linux Users Group. Meetings: http://tlug.ss.org > TLUG requests: Linux topics, No HTML, wrap text below 80 columns > How to UNSUBSCRIBE: http://tlug.ss.org/subscribe.shtml > -- The Toronto Linux Users Group. Meetings: http://tlug.ss.org TLUG requests: Linux topics, No HTML, wrap text below 80 columns How to UNSUBSCRIBE: http://tlug.ss.org/subscribe.shtml

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Hello Every One
by joehill-rieW9WUcm8FFJ04o6PK0Fg＠public.gmane.org 19 Dec '03

19 Dec '03

On 19 Dec 2003 12:55:58 -0500 Stephen Oulton <roulton623-bJEeYj9oJeDQT0dZR+AlfA at public.gmane.org> wrote: > When I ran top it told me that from 5.1 to 6.6 percent of my CPU was > being used. > > 85 programs were being used 81 were sleeping 2 were running and 2 were > zombie. > > That doesn't seem like a lot. No, doesn't sound like anything is chewing up your CPU or memory. > Maybe it is because the install crashed and I had to make it work with > my limited experience. I tried to install it 3 times and it crashed > during install every time. > > I even formated the drive and tried a clean install and it still crashed > on install. That is highly unusual. Don't get me wrong, I had my install of 9.2 hang on me once, but I just restarted the install from scratch and all was well. I'm by no means the biggest expert on here, but I see two real possibilities: The installation is corrupted somehow. Maybe one or more of the ISO's were bad? Hence the hideously bad experience on install...always check md5sums! md5sum filename.iso and compare it to what's on the Mandrake site. More likely though is some hardware issue, I'm thinkin' bad RAM. Come to think of it, you never did mention how much RAM you have in that machine (you really should have at the very least 128, but if you are running KDE or Gnome, those can really chew up memory, so 256 is what I usually recommend). I would try swapping out the RAM and see if the performance doesn't change. Also, right after you boot up, open a term and type: dmesg > dmesg.txt then open that text file in an editor and look for any errors, esp with regard to memory. -- JoeHill ++ ICQ # 280779813 Registered Linux user #282046 Homepage: www.orderinchaos.org +++++++++++++++++++++++++++ "Well, he might as well have been bombing Denmark." -- Gore Vidal, on the bombing of Afghanistan after 9/11 -- The Toronto Linux Users Group. Meetings: http://tlug.ss.org TLUG requests: Linux topics, No HTML, wrap text below 80 columns How to UNSUBSCRIBE: http://tlug.ss.org/subscribe.shtml

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Hello Every One
by roulton623-bJEeYj9oJeDQT0dZR+AlfA＠public.gmane.org 19 Dec '03

19 Dec '03

On Fri, 2003-12-19 at 05:19, JoeHill wrote:> don't think that is should run so slow. > > Austin makes some good points re the speed factor. I have 9.1 running my > webserver on a P166, and while it won't win any contests, it certainly doesn't > take 30 seconds to open an app. > > If you open a terminal and type "top", is there anything (at the top of the > list) using a lot of your CPU time or memory? When I ran top it told me that from 5.1 to 6.6 percent of my CPU was being used. 85 programs were being used 81 were sleeping 2 were running and 2 were zombie. That doesn't seem like a lot. Maybe it is because the install crashed and I had to make it work with my limited experience. I tried to install it 3 times and it crashed during install every time. I even formated the drive and tried a clean install and it still crashed on install. Thanks Stephen Oulton <roulton623-bJEeYj9oJeDQT0dZR+AlfA at public.gmane.org> -- The Toronto Linux Users Group. Meetings: http://tlug.ss.org TLUG requests: Linux topics, No HTML, wrap text below 80 columns How to UNSUBSCRIBE: http://tlug.ss.org/subscribe.shtml

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LVM, 'ext3' to 'reiserfs' conertion on '/' on software RAID5
by linux-5ZoueyuiTZhBDgjK7y7TUQ＠public.gmane.org 19 Dec '03

19 Dec '03

I have since been told to use the 'lvmcreate_initrd' command to create a new boot image that loads LVM tools before passing off to the kernel but the only way I can get to the disks (and their files) is using the Fedora install disk 1 in rescue mode where the directories that 'lvmcreate_initrd' look for off of '/' are actually mounted off 'mnt/sysimage'. I tried symlinking but it fails (I'll post below why in a sec). First, here is the kernel panic and a few lines leading up to it... -= Kernel panic... ... Creating block devices Scanning logical volumes vgscan -- reading all physical volumes (this may take a while...) raid5: switching cache buffer size, 4096 --> 1024 vgscan -- found inactive volume group "vg0" vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created vgscan -- WARNING: This program does not do a VGDA backup of your volume group Activating logical volumes vgchange -- volume group "vg0" successfully activate Mounting root filesystem VFS: Can't find ext3 filesystem on dev lvm(58,0). mount: error 22 mounting ext3 picotroot: pivot_root(/sysroot,/sysroot/initrd) failed: 2 umount /initrd/proc failed: 2 Freeing unused kernel memory: 136k freed Kernel panic: No init found. Try passing init= option to kernel. -= End kernel panic How would I pass options to the kernel (via "init="?) Here is what happens when I try to use the 'lvmcreate_initrd' tool under the rescue mode of the Fedora Install CD: -= First, 'df' before I begin... sh-2.05b# df Filesystem 1K-blocks Used Available Use% Mounted on rootfs 6120 3564 2206 62% / /dev/root.old 6120 3564 2206 62% / /tmp/cdrom 644864 644864 0 100% /mnt/source /dev/vg0/root 17919448 1916960 16002488 11% /mnt/sysimage /dev/hda1 101086 6767 89100 8% /mnt/sysimage/boot /dev/hda3 76304192 32828 72395284 1% /mnt/sysimage/single (Note that I have an IDE for '/boot' and swap) -= Okay, my simlinks are in place. Now running 'lvmcreate_initrd' sh-2.05b# lvmcreate_initrd Logical Volume Manager 1.0.3 by Heinz Mauelshagen 02/19/2002 lvmcreate_initrd -- make LVM initial ram disk /boot/initrd-lvm-2.4.22-1.2115.nptl.gz lvmcreate_initrd -- finding required shared libraries lvmcreate_initrd -- stripping shared libraries lvmcreate_initrd -- calculating initrd filesystem parameters lvmcreate_initrd -- calculating loopback file size du: invalid option -- c BusyBox v0.60.5 (2003.01.24-22:44+000) multi-call binary Usage: du [-lsxhmk] [FILE]... lvmcreate_initrd -- making loopback file (541 kB) lvmcreate_initrd -- making ram disk filesystem 9238 inodes) lvmcreate_initrd -- mounting ramdisk filesystem lvmcreate_initrd -- creating new /etc/modules.conf lvmcreate_initrd -- creating new modules.dep depmod: Can't open /lib/modules/2.4.22-1.2115.nptl/modules.dep for writing lvmcreate_initrd -- ERROR running depmod rmdir: unable to remove '/tmp/mnt.1185': Device or resource busy -= It failed... Here is 'df' again, with the loopback still mounted sh-2.05b# df Filesystem 1K-blocks Used Available Use% Mounted on rootfs 6120 3564 2206 62% / /dev/root.old 6120 3564 2206 62% / /tmp/cdrom 644864 644864 0 100% /mnt/source /dev/vg0/root 17919448 1916960 16002488 11% /mnt/sysimage /dev/hda1 101086 6767 89100 8% /mnt/sysimage/boot /dev/hda3 76304192 32828 72395284 1% /mnt/sysimage/single /dev/loop1 506 19 487 4% /tmp/mnt.1185 -= When I try to create a symlink to '/lib/modules' I am told: sh-2.05b# cd /lib sh-2.05b# ln -s /mnt/sysimage/lib/modules ln: creating symbolic link './modules' to '/mnt/sysimage/lib/modules': Read-only file system sh-2.05b# cd / sh-2.05b# ls -lah | grep lib lrwxrwxrwx 1 root root 16 Dec 19 12:05 lib -> /mnt/runtime/lib sh-2.05b# cd /mnt/runtime/ sh-2.05b# ls -lah | grep lib drwxr-xr-x 1 root root 1.6k Jan 1 1970 lib So, have I done something stupidly wrong?? Again, you help is -very- much appreciated! Madison Robert Brockway wrote: > On Fri, 19 Dec 2003, Madison Kelly wrote: > > >>Stupid question time, where would I enter that? At the grub menu? The >>kernel panic said something about passing something to init, is that where? > > > Hi Maddy. > > Could you post the panic message you are getting (assuming the suggesting > to use "linux reiserfs" doesn't work). > > Rob -- The Toronto Linux Users Group. Meetings: http://tlug.ss.org TLUG requests: Linux topics, No HTML, wrap text below 80 columns How to UNSUBSCRIBE: http://tlug.ss.org/subscribe.shtml

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hardware appraisal
by kmastin-PzQIwG9Jn9VAFePFGvp55w＠public.gmane.org 19 Dec '03

19 Dec '03

How does one valuate used hardware and servers, as well as tools and materials? My company has been bought by another company that requires a third party valuation of all the equipment and inventory that I have as a condition of certain government funding arrangements (it's an indian band in B.C.). I have also been hired to run the new company, and so am too close to provide an accurate accounting of the equipment as is. Some of the servers are very dated (p120, p150, etc.) but still perform specific and valuable tasks such as archiving backups or monitoring the network. Rather than going through the hassle of re-programming the same functions into fast and furious hardware (new aka overkill for these functions) I would rather keep the current hardware and just plug it into the new location, at a considerable cost savings to the new company. Simply amortizing the cost of the hardware will not work, as it is the specific functions that they perform or the fact that a lot of it is hard to find now which makes them worth keeping. I have sale and purchase prices on all of it, including inventory, some of which is refurbished or used. I also have some very dated inventory that I keep 'just in case' it's needed somewhere, and it has proven to be very valuable for repairs or replacements on client's systems in a number of cases (replace a EDO memory stick rather and get them back up and running NOW rather than sell them a new server and have them go through considerable downtime while I program the new hardware for it's specified function). There are also tools that have no end of life, and so I'm reluctant to value them at purchase price less amortization. The replacement value of the tools is now considerably more than it was when I bought most of them, but I feel it would be unfair to stick the appreciated price on them rather than the purchase price. Any ideas or advice on this would be greatly appreciated, as I can't go ahead with the sale until I can find a correct formula for the appraisal that can be applied by an appraiser. Thanks in advance... -- Keith Mastin -- The Toronto Linux Users Group. Meetings: http://tlug.ss.org TLUG requests: Linux topics, No HTML, wrap text below 80 columns How to UNSUBSCRIBE: http://tlug.ss.org/subscribe.shtml

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Another list
by matt-s/rLXaiAEBtBDgjK7y7TUQ＠public.gmane.org 19 Dec '03

19 Dec '03

"Teddy Mills" <teddymills-VFlxZYho3OA at public.gmane.org> writes: > Can Drew make another TLUG list? For what purpose? If you want a technical centric list where people ask questions and others answer them try the NewTLUG list: http://newtlug.linux.ca/mailman/listinfo/talk Even our infamous Thamer is a good and very helpful citizen on the list. Except now that I've said that he's going to act up :) -- matthew rice <matt-s/rLXaiAEBtBDgjK7y7TUQ at public.gmane.org> starnix inc. phone: 905-771-0017 x242 thornhill, ontario, canada http://www.starnix.com professional linux services & products -- The Toronto Linux Users Group. Meetings: http://tlug.ss.org TLUG requests: Linux topics, No HTML, wrap text below 80 columns How to UNSUBSCRIBE: http://tlug.ss.org/subscribe.shtml

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LVM, 'ext3' to 'reiserfs' conertion on '/' on software RAID5
by robert-5LEc/6Zm6xCUd8a0hrldnti2O/JbrIOy＠public.gmane.org 19 Dec '03

19 Dec '03

On Fri, 19 Dec 2003, Madison Kelly wrote: > Stupid question time, where would I enter that? At the grub menu? The > kernel panic said something about passing something to init, is that where? Hi Maddy. Could you post the panic message you are getting (assuming the suggesting to use "linux reiserfs" doesn't work). Rob -- Robert Brockway B.Sc. email: robert-5LEc/6Zm6xCUd8a0hrldnti2O/JbrIOy at public.gmane.org, zzbrock at uqconnect.net Linux counter project ID #16440 (http://counter.li.org) "The earth is but one country and mankind its citizens" -Baha'u'llah -- The Toronto Linux Users Group. Meetings: http://tlug.ss.org TLUG requests: Linux topics, No HTML, wrap text below 80 columns How to UNSUBSCRIBE: http://tlug.ss.org/subscribe.shtml

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