Run out of memory and segfault reported?

[uestcmahone]

7. After executing two concurrent tasks for ext4 and f2fs fuzz for about 36 hours on x86_64 server with 282GB memory , ext4-combined-consistency and f2fs-combined-consistency reported segfault,
   and I found there is not enough memory available, tmpfs-separate consumes almost all memory, is this a bug or is it caused by my misuse?

none tmpfs 142G 142G 0 100% /tmp/mosbench/tmpfs-separate/1
none tmpfs 142G 142G 0 100% /tmp/mosbench/tmpfs-separate/4

~/hydra/src$ free -m
total used free shared buff/cache available
Mem: 289419 1510 1006 279783 286903 5485
Swap: 95366 9741 85625

[squizz617]

For performance, tmpfs uses the main memory instead of disk to store files. It seems that too many bug reports (logs and buggy disk images) were stored under tmpfs, and as a result your system ran out of memory. Segfault of ext4-combined-consistency must be another side-effect of that.
You can consider using a disk with some free space left instead of tmpfs, or occasionally clearing the log directory.