...don't use Token Ring. It is such an astounding brain-damaged protocal its a wonder anyone ever started using it, and its blasphemous that anyone uses it today. Not to be rude, but your management must be full of complete morons if they are still using token ring.
From everything I've read about such programs, you'd have to be careful that the dominant "species" didn't become the one that could pretend that it had infected a bunch of systems....
I agree... at least, I feel that where Kubrick would have ended it. The lasst 10 minutes were neat from a sci-fi and special effects point of view, but just seemed way to cheesy in the context of the rest of the movie.
I understand that the Tux in-kernel webserver stuff is pretty minimal, but isn't running anything as notoriously security-risky as a webserver directly from kernel space a Really Bad Idea? I understand that Tux is fairly simple & open to peer review, but it seems like any tiny unchecked buffer or similar security hole could easily result in a remote root exploit, or at least a DOS atack (i.e. forcing a kernel panic).
The whole idea is pretty neat, though, and if there really isn't any risk of security problems, this could be a huge boon to busy web sites everywhere...
I truly wonder if all of these problems would have occurred if I'd ordered the Verizon package instead of the Covad one.
A friend of mine ordered DSL from Telocity, and waited about a month for BellSouth to hook up the local line. After several phone calls, etc, he canceled the Telocity order and got DSL directly from BellSouth. Miraclulously, he was up and running less than a week later! So then he switched his existing connection over to Telocity.
I have no doubt the Baby Bells do this on purpose. I hope Covad and the other independent DSL providers sue the shit out of these assholes and win. Of course they won't win....
Wow! Thank god we have innovators like TiVo around to come up with these brilliant "time warping" concepts. What a time saver!
Hey, this gives me an idea now. What if a computer could do more than one thing at once? I'll call it "multitasking". Imagine the convience of having a computer perform multiple tasks at the same time. I'll make millions! Now, where's that patent application....
"Open source" means that anyone can get a copy of the source code. Developers can find security weaknesses very easily with Linux. The same is not true with Microsoft Windows.
Replace the word "find" with the word "fix", and you've got an equally true but completely opposite argument....
don't forget - OJ was not guilty of murder, but still lost the civil trial and had to pay $$$ - he was financial responsible for the murders, but not guilty of them....
----
Re:GCC optimizations and benchmarking
on
Kernel Benchmarks
·
· Score: 2
is this stuff documented anywhere? has anyone gone through and done a thourough analysis of when each gcc option is best used? doing so might be very beneficial for linux overall....
While I was in college, I tried staggered 2-hour naps throughout the day instead of one 8 hour sleep cycle at night. I'd sleep from noon til 2pm, 6pm to 8pm and 2am to 4am, or something like that. Thus I ended up with 6 hours of sleep a day, but feeling much better overall than the standard sleep cycle. It also amazing how much studying you can get done from 4 to 7 in the morning:)
Unfortunately, you get tired pretty quickly if you miss your scheduled naps, and its hard to have much a social life when you sleep in the early evening. Maybe if your lifestyle allows this kind of flexibility, you might want to try it out.
It seems like the world's litigious companies are running out of things to sue for. They've started attacking basic physics. In a few years, someone is going to sue the entire world for unauthorized use of quarks, and after that there will be nothing left to claim as intellectual property.
- you probably can't directly boot windows from a CDROM, because it doesn't like read-only boot volumes
- you *might* be able to copy the windows directory into the ram disk in AUTOEXEC.BAT, but I dunno if subst works in DOS.
- you might also need to disable the IDE controllers in device manager so windows runs in "msdos compatibility mode", otherwise when the IDE drivers start up, they'll try to reassign C: to the hard drive instead of the RAM drive
I'll describe a little experiment I tried a while back, just to see if I could. You might find it useful.
First, there are numerous utilities out there to create RAM disks... device drivers you can put in CONFIG.SYS to give you a drive letter which exists in RAM. Now, the only one I could find was limited to 32 megs. Not enough space? Bah! I installed Windows 95 (the original version) on the hard drive, and was able to delete unnecessary files (help files, etc) to trim the windows directory down to about 25 megs. Also had to disable virtual memory, but I had enough left over RAM that it didn't really matter.
Now, there are a few tricks you need to know to get Windows to boot out of a RAM disk. First, you need to 'subst' command, which lets you raassign drive letters to other directories. For example:
subst x: c:\xdrive
Will let you access c:\xdrive as drive X:. The cool thing is you can reasign existing drive letters:
subst a: c:\floppy
So now A: is just a "symlink" to c:\floppy
Also, you need to know how to do a soft reboot of Windows. If you hold down "shift" when hitting the OK button in the restart dialog, windows will restart but not actualy reboot the computer - so the contents of your RAM disk will stay around. This is basically what happens when you have windows run in "MSDOS mode"... it does a soft restart to a DOS prompt, then when you type exit it restarts Windows without a reboot. So, you can just make a shortcut to an empty batch file, set it run in MSDOS mode, and when you run the shortcut, Windows will do a soft restart.
So, all you need to is write a batch file to run at startup which does the following:
1) copy the Windows directory into you RAM disk R:
2) delete this batch file from the RAM disk
3) subst c: r:\
4) do a soft restart
Now, when you boot your minimal Windows from the hard drive, it will copy itself to RAM, switch the C: drive to the RAM drive, and soft restart itself from the RAM disk. It takes about 2-3 seconds for Windows to do a complete soft restart.
Yoy might be able to do the same thing from a CDROM.
----
Re:Motherboard memory bandwidth MUCH higher than 1
on
What is Ultra DMA?
·
· Score: 2
I think he meant PCI speed, which on most boards is limited to 133 MB/s (32 bits X 33 mhz). Of course, newer Macs have 266 MB/s (64 bits X 33 mhz), and high end server boards have 533 MB/s (64 bits X 66 mhz). Coming soon, fun interfaces like Infiniband, PCI-X, and LDT/HyperTransport, where life starts at around 1GB/s....
Because there's probably one particular model of Widgetcorp hard drives that don't support it correctly, so for compatibility reasons its disabled by default. Actually, I know if Windows, enabling DMA on a CDR/CDRW drive is begging for lock-ups and general wierdo behaviour - but DMA is almost necessary to use a DVD drive...
Technically, DMA just means Direct Memory Access, and just about any peripheral that uses large amounts of data (SCSI card, network cards, etc) is using DMA these days (hopefully). DMA is just a way of moving data from the card to the host computer's memory with little CPU intervention, i.e. instead of copying data bit-by-bit from your IDE controller, the driver just says "copy block 1152 into memory location 853E4210" and the hardware takes care of the actual data movement.
So the UltraDMA stuff you are asking about is more accurately called UltraATA. ITs basically an extension of the ancient AT disk interface spec to encompass new features like DMA, auto-detection, higher raw data rates, removable media, etc. (I think UltraATA even supports some SCSI-like features such as disconnect)
What's most amazing about that is that the storage is spread across 8000 computers, instead of concentrated in a few monsterous racks. As someone working in the storage industry, I find that approach quite suprising.... I would have thought it been cheaper and far easier to manage, say, 1000 servers and a dozen massive disk arrays than to have 8000 points of failure to worry about.
I doubt it. Apps in OS X use an API called Cocoa or Carbon (I forget which). The kernel of OS X is BSD-based, as are some of the core OS components, but most GUI-oriented stuff uses Apple's (closed-source) API. Porting from that to, say, Gnome, is probably no easier than porting from Win32.
/. gets several hundred story submissions a day, most of them probably trolls or duplicates (think about how many they got when the 2.4 kernel came out). They don't have the time, or incentive, to specificy why they reject a story, although I agree it would be nice
Slashdot Mirror
...don't use Token Ring. It is such an astounding brain-damaged protocal its a wonder anyone ever started using it, and its blasphemous that anyone uses it today. Not to be rude, but your management must be full of complete morons if they are still using token ring.
...They represent mistakes made by a young company...
:)
Like a chair budget of $1000 per employee??
From everything I've read about such programs, you'd have to be careful that the dominant "species" didn't become the one that could pretend that it had infected a bunch of systems....
from http://www.planetebook.com/mainpage.asp?webpageid= 165
The reason for the arrest has been cited as being the Advanced eBook Processor and his speech at DefCon 9.
----
I agree... at least, I feel that where Kubrick would have ended it. The lasst 10 minutes were neat from a sci-fi and special effects point of view, but just seemed way to cheesy in the context of the rest of the movie.
----
I understand that the Tux in-kernel webserver stuff is pretty minimal, but isn't running anything as notoriously security-risky as a webserver directly from kernel space a Really Bad Idea? I understand that Tux is fairly simple & open to peer review, but it seems like any tiny unchecked buffer or similar security hole could easily result in a remote root exploit, or at least a DOS atack (i.e. forcing a kernel panic).
The whole idea is pretty neat, though, and if there really isn't any risk of security problems, this could be a huge boon to busy web sites everywhere...
----
I truly wonder if all of these problems would have occurred if I'd ordered the Verizon package instead of the Covad one.
A friend of mine ordered DSL from Telocity, and waited about a month for BellSouth to hook up the local line. After several phone calls, etc, he canceled the Telocity order and got DSL directly from BellSouth. Miraclulously, he was up and running less than a week later! So then he switched his existing connection over to Telocity.
I have no doubt the Baby Bells do this on purpose. I hope Covad and the other independent DSL providers sue the shit out of these assholes and win. Of course they won't win....
----
Wow! Thank god we have innovators like TiVo around to come up with these brilliant "time warping" concepts. What a time saver!
Hey, this gives me an idea now. What if a computer could do more than one thing at once? I'll call it "multitasking". Imagine the convience of having a computer perform multiple tasks at the same time. I'll make millions! Now, where's that patent application....
----
"Open source" means that anyone can get a copy of the source code. Developers can find security weaknesses very easily with Linux. The same is not true with Microsoft Windows.
Replace the word "find" with the word "fix", and you've got an equally true but completely opposite argument....
----
Nope, he's still alive and kicking
----
don't forget - OJ was not guilty of murder, but still lost the civil trial and had to pay $$$ - he was financial responsible for the murders, but not guilty of them....
----
is this stuff documented anywhere? has anyone gone through and done a thourough analysis of when each gcc option is best used? doing so might be very beneficial for linux overall....
----
While I was in college, I tried staggered 2-hour naps throughout the day instead of one 8 hour sleep cycle at night. I'd sleep from noon til 2pm, 6pm to 8pm and 2am to 4am, or something like that. Thus I ended up with 6 hours of sleep a day, but feeling much better overall than the standard sleep cycle. It also amazing how much studying you can get done from 4 to 7 in the morning :)
Unfortunately, you get tired pretty quickly if you miss your scheduled naps, and its hard to have much a social life when you sleep in the early evening. Maybe if your lifestyle allows this kind of flexibility, you might want to try it out.
----
It seems like the world's litigious companies are running out of things to sue for. They've started attacking basic physics. In a few years, someone is going to sue the entire world for unauthorized use of quarks, and after that there will be nothing left to claim as intellectual property.
----
A couple things I forgot:
- you probably can't directly boot windows from a CDROM, because it doesn't like read-only boot volumes
- you *might* be able to copy the windows directory into the ram disk in AUTOEXEC.BAT, but I dunno if subst works in DOS.
- you might also need to disable the IDE controllers in device manager so windows runs in "msdos compatibility mode", otherwise when the IDE drivers start up, they'll try to reassign C: to the hard drive instead of the RAM drive
----
I'll describe a little experiment I tried a while back, just to see if I could. You might find it useful.
First, there are numerous utilities out there to create RAM disks... device drivers you can put in CONFIG.SYS to give you a drive letter which exists in RAM. Now, the only one I could find was limited to 32 megs. Not enough space? Bah! I installed Windows 95 (the original version) on the hard drive, and was able to delete unnecessary files (help files, etc) to trim the windows directory down to about 25 megs. Also had to disable virtual memory, but I had enough left over RAM that it didn't really matter.
Now, there are a few tricks you need to know to get Windows to boot out of a RAM disk. First, you need to 'subst' command, which lets you raassign drive letters to other directories. For example:
subst x: c:\xdrive
Will let you access c:\xdrive as drive X:. The cool thing is you can reasign existing drive letters:
subst a: c:\floppy
So now A: is just a "symlink" to c:\floppy
Also, you need to know how to do a soft reboot of Windows. If you hold down "shift" when hitting the OK button in the restart dialog, windows will restart but not actualy reboot the computer - so the contents of your RAM disk will stay around. This is basically what happens when you have windows run in "MSDOS mode"... it does a soft restart to a DOS prompt, then when you type exit it restarts Windows without a reboot. So, you can just make a shortcut to an empty batch file, set it run in MSDOS mode, and when you run the shortcut, Windows will do a soft restart.
So, all you need to is write a batch file to run at startup which does the following:
1) copy the Windows directory into you RAM disk R:
2) delete this batch file from the RAM disk
3) subst c: r:\
4) do a soft restart
Now, when you boot your minimal Windows from the hard drive, it will copy itself to RAM, switch the C: drive to the RAM drive, and soft restart itself from the RAM disk. It takes about 2-3 seconds for Windows to do a complete soft restart.
Yoy might be able to do the same thing from a CDROM.
----
I think he meant PCI speed, which on most boards is limited to 133 MB/s (32 bits X 33 mhz). Of course, newer Macs have 266 MB/s (64 bits X 33 mhz), and high end server boards have 533 MB/s (64 bits X 66 mhz). Coming soon, fun interfaces like Infiniband, PCI-X, and LDT/HyperTransport, where life starts at around 1GB/s....
----
Because there's probably one particular model of Widgetcorp hard drives that don't support it correctly, so for compatibility reasons its disabled by default. Actually, I know if Windows, enabling DMA on a CDR/CDRW drive is begging for lock-ups and general wierdo behaviour - but DMA is almost necessary to use a DVD drive...
----
Well, yeah, but my point is that refering to ATA as "DMA" is not entirely correct.
----
Technically, DMA just means Direct Memory Access, and just about any peripheral that uses large amounts of data (SCSI card, network cards, etc) is using DMA these days (hopefully). DMA is just a way of moving data from the card to the host computer's memory with little CPU intervention, i.e. instead of copying data bit-by-bit from your IDE controller, the driver just says "copy block 1152 into memory location 853E4210" and the hardware takes care of the actual data movement.
So the UltraDMA stuff you are asking about is more accurately called UltraATA. ITs basically an extension of the ancient AT disk interface spec to encompass new features like DMA, auto-detection, higher raw data rates, removable media, etc. (I think UltraATA even supports some SCSI-like features such as disconnect)
----
What's most amazing about that is that the storage is spread across 8000 computers, instead of concentrated in a few monsterous racks. As someone working in the storage industry, I find that approach quite suprising.... I would have thought it been cheaper and far easier to manage, say, 1000 servers and a dozen massive disk arrays than to have 8000 points of failure to worry about.
----
now I can sue slashdot for all the time I've wasted at work, not to mention the trauma of being moderated down...
----
I doubt it. Apps in OS X use an API called Cocoa or Carbon (I forget which). The kernel of OS X is BSD-based, as are some of the core OS components, but most GUI-oriented stuff uses Apple's (closed-source) API. Porting from that to, say, Gnome, is probably no easier than porting from Win32.
----
So this is similar to CDROM data and other serial data that is "self-timing"? Do you have any more in depth articles or whitepapers to back this up?
----
/. gets several hundred story submissions a day, most of them probably trolls or duplicates (think about how many they got when the 2.4 kernel came out). They don't have the time, or incentive, to specificy why they reject a story, although I agree it would be nice
----