UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36

Steps to reproduce the problem:
1. Run chrome for a while with various tab
2. GPU process uses a large amount of RAM
3. Kill in the task killer all heavy tabs;
4. GPU process memory after 30 minutes still too high;

What is the expected behavior?
Lower memory usage!
Of course after a few minutes for cache reasons on recent tabs. 

What went wrong?
GPU process uses large amounts of RAM after using chrome for a while, expected a more reasonable level considering the machine total RAM 4GiB but windows(34MB lock) linux(110MB lock) total available differs by a lot because of remappings. So the GPU process usage reach more than 750MB.

Did this work before? N/A 

Chrome version: 52.0.2743.116  Channel: stable
OS Version: 4.7.1-1-ARCH 
Flash Version: Shockwave Flash 22.0 r0

CPU Intel(R) Celeron(R) CPU 847 @ 1.10GHz
Sandy-bridge gpu xf86-video-intel 1:2.99.917+697+g12c14de-1
|GPU| Powered On  5,5%|RC6        94,5% 

vm.page-cluster =4
vm.min_free_kbytes =4096
vm.lowmem_reserve_ratio =512    512     16
vm.stat_interval = 4
vm.swappiness = 1
vm.vfs_cache_pressure = 75
vm.dirty_background_ratio = 3
vm.dirty_ratio = 6
 

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