[Lustre-discuss] Process accessing Lustre be killed on Lustre client

[Lu Wang]

 I solved this problem by reduce "/proc/fs/lustre/llite/*/max_cached_mb" 


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Lu Wang
2009-03-03

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发件人：Lu Wang
发送日期：2009-03-02 16:07:43
收件人：lustre-discuss
抄送：
主题：[Lustre-discuss] Process accessing Lustre be killed on Lustre client

Dear list,
    One of  our application, which generates large files( about 500MB /file), always got killed on Lustre Client. 
Here is the log:
Feb  2 11:55:17 bws0044 kernel: Free pages:     1449604kB (1433152kB HighMem)
Feb  2 11:55:17 bws0044 kernel: Active:1348397 inactive:2249899 dirty:3044 writeback:445 unstable:0 free:362401 slab:185354 mapped:523156 page
tables:3413
Feb  2 11:55:17 bws0044 kernel: DMA free:12532kB min:72kB low:144kB high:216kB active:0kB inactive:0kB present:16384kB pages_scanned:341 all_u
nreclaimable? yes
Feb  2 11:55:17 bws0044 kernel: protections[]: 0 0 0
Feb  2 11:55:17 bws0044 kernel: Normal free:3920kB min:4020kB low:8040kB high:12060kB active:312kB inactive:96kB present:901120kB pages_scanne
d:6839 all_unreclaimable? yes
Feb  2 11:55:17 bws0044 kernel: protections[]: 0 0 0
Feb  2 11:55:17 bws0044 kernel: HighMem free:1433152kB min:512kB low:1024kB high:1536kB active:5393276kB inactive:8999500kB present:16646144kB
 pages_scanned:0 all_unreclaimable? no
Feb  2 11:55:17 bws0044 kernel: protections[]: 0 0 0
Feb  2 11:55:17 bws0044 kernel: DMA: 3*4kB 3*8kB 3*16kB 3*32kB 3*64kB 3*128kB 2*256kB 0*512kB 1*1024kB 1*2048kB 2*4096kB = 12532kB
Feb  2 11:55:17 bws0044 kernel: Normal: 0*4kB 0*8kB 1*16kB 0*32kB 1*64kB 0*128kB 1*256kB 1*512kB 1*1024kB 1*2048kB 0*4096kB = 3920kB
Feb  2 11:55:17 bws0044 kernel: HighMem: 19608*4kB 2564*8kB 476*16kB 230*32kB 2363*64kB 223*128kB 1*256kB 1*512kB 0*1024kB 0*2048kB 278*4096kB
 = 1433152kB
Feb  2 11:55:17 bws0044 kernel: Swap cache: add 0, delete 0, find 0/0, race 0+0
Feb  2 11:55:17 bws0044 kernel: 0 bounce buffer pages
Feb  2 11:55:17 bws0044 kernel: Free swap:       8193140kB
Feb  2 11:55:17 bws0044 kernel: 4390912 pages of RAM
Feb  2 11:55:17 bws0044 kernel: 3964860 pages of HIGHMEM
Feb  2 11:55:17 bws0044 kernel: 232558 reserved pages
Feb  2 11:55:17 bws0044 kernel: 3103013 pages shared
Feb  2 11:55:17 bws0044 kernel: 0 pages swap cached
Feb  2 11:55:17 bws0044 kernel: Out of Memory: Killed process 17313 (boss.exe).
Feb  2 11:55:17 bws0044 kernel: oom-killer: gfp_mask=0xd0

My question is: 
1.Does Lustre client requires a lot of low memory?
2. for our application, need I update clients to 64 bit? 
 				
------------------------------------------------------------------------
Lu WANG                                          
 Computing Center，IHEP              Tel: (+86) 10 8823 6012 ext 607
P.O. Box 918-7                                   Email: wanglu at ihep.ac.cn
Beijing 100049，China                            

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