Bug 201675

Summary: TMPFS allocations don't count as allocated RAM
Product: Memory Management Reporter: Artem S. Tashkinov (aros)
Component: OtherAssignee: Andrew Morton (akpm)
Status: RESOLVED CODE_FIX    
Severity: high CC: torvalds
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: GIT Subsystem:
Regression: No Bisected commit-id:
Bug Depends on:    
Bug Blocks: 201673    

Description Artem S. Tashkinov 2018-11-12 22:16:00 UTC 
It makes a lot of sense to make TMPFS a userspace application, so that it would be possible to kill it in case it overcommits memory (see bug 201673) and to understand real memory pressure using top/ps.

Right now, both `top` and `free` don't take the RAM consumed by TMPFS into consideration (and I presume the kernel itself) which leads to all sorts of bad situations.

This looks like a very serious bug probably needs to be fixed.
Comment 1 Artem S. Tashkinov 2020-08-14 13:20:36 UTC 
What do you think Linus?
Comment 2 Artem S. Tashkinov 2021-12-30 20:26:17 UTC 
AFAIK, this has been changed/fixed and now reported as shared memory.