Does RSS Include Kernel Space Memory?

Question

I am writing a simple memory profiler by reading the VmRSS value of /proc/[pid]/status. My question is that does a process' RSS include kernel space memory? Thank you!

No, I don't think so. Per process kernel memory is quite small. — Basile Starynkevitch
– Basile Starynkevitch, Commented Feb 26, 2014 at 5:47
On linuxintro.org/wiki/Memory_management I am blogging how I advance understanding Linux memory management. This is because I have not found a comprehensive documentation. Here is how I created a map of my processes' memory: pmap $(ps -A | awk '{print $1}'|grep -v PID) | sort — Thorsten Staerk
– Thorsten Staerk, Commented Feb 26, 2014 at 5:54

Jason · Accepted Answer · 2014-02-26 06:36:58Z

3

No, if you read the code in task_mmu.c you'll see that it's strictly pages allocated to the process. Kernel space memory usage doesn't really have a quantifiable value at process scope. Any memory increase in the kernel after a process starts execution should be negligible though.

answered Feb 26, 2014 at 6:36

Jason

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user2699113 · Accepted Answer · 2014-02-26 05:47:56Z

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AFAIK RSS tells how much user space memory given process occupies.

answered Feb 26, 2014 at 5:47

user2699113

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