Couple of questions on OOM trace.

[Shraddha Kamat]

Here is the OOM trace header : 

Out of memory: Kill process 5374 (min_free_kbytes) score 944 or sacrifice child
Killed process 5374 (min_free_kbytes)  total-vm:30495360kB,anon-rss:20155328kB, file-rss:64kB
min_free_kbytes invoked oom-killer: gfp_mask=0x200da, order=0, oom_score_adj=0
min_free_kbytes cpuset=/ mems_allowed=0

------------------


I understand that in this case free pages has gone below min_pages(1). 

Couple of questions based on these 4 lines : 

(1) I googled a lot but I am not able to find the meaning of 'score
994' , anon-rss and file-rss ? 

(2) In my understanding gfp_mask is relevant here to know from which
Zone the memory allocation was tried , but failed - right ?  

(3) What do order and oom_score_adj signify here ?


Regards,
Shraddha 




(1) http://dd.qc.ca/people.redhat.com/kernel/min_free_kbytes.html