search

NVSL / linux-nova

NOVA is a log-structured file system designed for byte-addressable non-volatile memories, developed at the University of California, San Diego.
http://nvsl.ucsd.edu/index.php?path=projects/nova
Other
421 stars 118 forks source link

mount nova blocked #80

Closed CCrainys closed 4 years ago

CCrainys commented 4 years ago

Hi, Nova is a great job in nvm, I hope to test it to learn something from it. However, I encountered some problems during testing.

  1. When I tested linux-nova in my virtual machine ubuntu18.04, I encountered a problem I use kernel option ""memmap=4G!12G" to create pmem0. And compile linux-nova master branch. According to nova.txt in documentation folder, 1. modprobe nova, 2. mount -t NOVA -o init /dev/pmem0 /mnt/ramdisk step 1 was successful, however, there were some problems in step2, as the picture shows, Screen Shot 2020-06-03 at 11 29 39 PM

    fitstly, output is "killed", secondly, the mount process was blocked, couldn't have any results. Does virtual machine not support pmem0? If so, I can use physical machine.

  1. According to your paper and nova.txt, it use some of dram as nvm to run nova. But intel has released real nvm, optane persistent memory, I wonder wether nova can run successfully in optane persistent memory.

Looking forward your reply! Thanks a lot

Best regards Francis

Andiry commented 4 years ago
  1. What is the output of dmesg? Can you try physical machine to see if the issue still exist?
  2. I believe so. see https://www.usenix.org/conference/fast20/presentation/yang
CCrainys commented 4 years ago

Yeah, it works in physical machine. Thanks!