I'm posting again. This bug still exists. Easily reproducible. Here's how. (You NEED to be able to essentially use up RAM to see this bug in action)
Tested on a 3GB desktop (Core 2 Quad), running Live Ubuntu 18.10 LTS off of a flash drive (pendrivelinux.com). Kernel 4.18.0-10. FF 63.0. I set the download folder to a dir on the hard drive so as not to deliberately stress free RAM. With the system showing about 1.5GB free (System Monitor/Resources tab), trying to d/l this 1.25GB ROM image from Mega ( https://mega.nz/#!KUAyRKjJ!3hALO7dkuyFdE41BTWf1OfHaZmdTA-Kzd8q0HYiMbYs ), the d/l gets to 100% but system monitor shows RAM at 97% or 98%, the flash drive lights up and stays lit. System frozen, as I've reported previously with my other laptops. I've mitigated this on the laptops because they now have 8GB of RAM. BUT-- even then, I can STILL crash those systems using Live Debian (or whatever flavor). It just takes more stressing (more open tabs, bigger d/l's, whatever) to get there, but it does. Quite the blackpill that Linux memory management has the serious flaw un-addressed for 13 years now. It's very easy to reproduce on *any* 64-bit system following the guidelines above. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/159356 Title: When DMA is disabled system freeze on high memory usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
