[Bug] vramfs deadlock caused by vramfs getting swapped to vram swap

[Atrate]

Hello,

I have set-up swap on VRAM using vramfs and the guide from https://wiki.archlinux.org/title/Swap_on_video_RAM#FUSE_filesystem .

The problem appears when, under high memory pressure, vramfs gets swapped to VRAM, causing a complete deadlock.

Solution: use the mlockall(MCL_CURRENT | MCL_FUTURE) syscall to lock vramfs's memory and not have it be swapped.

Workaround: #3 (comment)

[Overv]

Could you make a PR to implement this solution? :) I'm not too familiar with mlockall, so I'm not sure where to put it.

[Atrate]

Me neither, I'm afraid. I just know that a syscall like that exists, but I haven't ever implemented it.