Messages in this thread | | | From | "Rüegg, Peter H." <> | Subject | AW: Complete freeze with 2.4.20 on 4-proc IBM xSeries 350 | Date | Wed, 11 Dec 2002 22:55:04 +0100 |
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On Wed, 11. December 2002, Martin J. Bligh wrote: >> I'm experiencing serious problems with Kernel 2.4.20 on a >> IBM xSeries 350 machine, having 4 700 MHz processors and >> 4 GB RAM (same on another machine with the same configuration, >> but only 3 GB RAM). The machine just completely freezes >> after some time, ranging from 20 minutes to 3 hours. It >> is running IBM DB/2 with quite some load, the base system >> is RedHat 7.2 with all the updates applied. There is no >> oops or other fault, just a plain freeze. > > Can you watch /proc/meminfo and see how low "lowfree" gets? > If it gets low (eg below 50Mb), dump /proc/slabinfo as well.
Thanks for your input! However, that doesn't seem to be the problem. When the machine crashed this time, there still was 829MB of LowFree memory available. See the two files a few seconds before the freeze below.
Any other thoughts, anyone?
Thanks in advance!
Peter H. Ruegg Systems-/Networkadministrator RHCE eEnterprises Technology
--8<------------------------------------------------------------------------ - main(){char*s="O_>>^PQAHBbPQAHBbPOOH^^PAAHBJPAAHBbPA_H>BB";int i,j,k=1,l,m,n; for(j=0;j<7;j++)for(l=0;m=l-6+j,i=m/6,n=j*6+i,k=1<<m%6,l<41-j;l++) putchar(l<6-j?' ':l==40-j?'\n':k&&s[n]&k?'*':' ');}
total: used: free: shared: buffers: cached: Mem: 3901415424 1651003392 2250412032 0 3432448 1415294976 Swap: 2147467264 0 2147467264 MemTotal: 3809976 kB MemFree: 2197668 kB MemShared: 0 kB Buffers: 3352 kB Cached: 1382124 kB SwapCached: 0 kB Active: 81164 kB Inactive: 1486032 kB HighTotal: 2940900 kB HighFree: 1368624 kB LowTotal: 869076 kB LowFree: 829044 kB SwapTotal: 2097136 kB SwapFree: 2097136 kB -------------------------------- slabinfo - version: 1.1 (SMP) kmem_cache 80 80 244 5 5 1 : 252 126 tcp_tw_bucket 30 30 128 1 1 1 : 252 126 tcp_bind_bucket 339 339 32 3 3 1 : 252 126 tcp_open_request 120 120 96 3 3 1 : 252 126 inet_peer_cache 118 118 64 2 2 1 : 252 126 ip_fib_hash 452 452 32 4 4 1 : 252 126 ip_dst_cache 144 144 160 6 6 1 : 252 126 arp_cache 120 120 128 4 4 1 : 252 126 blkdev_requests 1160 1160 96 29 29 1 : 252 126 nfs_write_data 0 0 352 0 0 1 : 124 62 nfs_read_data 0 0 352 0 0 1 : 124 62 nfs_page 0 0 96 0 0 1 : 252 126 journal_head 0 0 48 0 0 1 : 252 126 revoke_table 0 0 12 0 0 1 : 252 126 revoke_record 0 0 32 0 0 1 : 252 126 dnotify_cache 0 0 20 0 0 1 : 252 126 file_lock_cache 240 240 96 6 6 1 : 252 126 fasync_cache 0 0 16 0 0 1 : 252 126 uid_cache 452 452 32 4 4 1 : 252 126 skbuff_head_cache 822 1200 160 49 50 1 : 252 126 sock 272 272 928 68 68 1 : 124 62 sigqueue 628 754 132 23 26 1 : 252 126 kiobuf 0 0 64 0 0 1 : 252 126 cdev_cache 354 354 64 6 6 1 : 252 126 bdev_cache 236 236 64 4 4 1 : 252 126 mnt_cache 236 236 64 4 4 1 : 252 126 inode_cache 4032 4032 480 504 504 1 : 124 62 dentry_cache 5280 5280 128 176 176 1 : 252 126 dquot 0 0 128 0 0 1 : 252 126 filp 1530 1530 128 51 51 1 : 252 126 names_cache 12 12 4096 12 12 1 : 60 30 buffer_head 42114 42240 96 1056 1056 1 : 252 126 mm_struct 336 336 160 14 14 1 : 252 126 vm_area_struct 6142 6520 96 163 163 1 : 252 126 fs_cache 413 413 64 7 7 1 : 252 126 files_cache 306 306 416 34 34 1 : 124 62 signal_act 258 258 1312 86 86 1 : 60 30 size-131072(DMA) 0 0 131072 0 0 32 : 0 0 size-131072 0 0 131072 0 0 32 : 0 0 size-65536(DMA) 0 0 65536 0 0 16 : 0 0 size-65536 0 0 65536 0 0 16 : 0 0 size-32768(DMA) 0 0 32768 0 0 8 : 0 0 size-32768 0 0 32768 0 0 8 : 0 0 size-16384(DMA) 0 0 16384 0 0 4 : 0 0 size-16384 5 5 16384 5 5 4 : 0 0 size-8192(DMA) 0 0 8192 0 0 2 : 0 0 size-8192 4 5 8192 4 5 2 : 0 0 size-4096(DMA) 0 0 4096 0 0 1 : 60 30 size-4096 37 37 4096 37 37 1 : 60 30 size-2048(DMA) 0 0 2048 0 0 1 : 60 30 size-2048 162 222 2048 81 111 1 : 60 30 size-1024(DMA) 0 0 1024 0 0 1 : 124 62 size-1024 404 404 1024 101 101 1 : 124 62 size-512(DMA) 0 0 512 0 0 1 : 124 62 size-512 554 616 512 76 77 1 : 124 62 size-256(DMA) 0 0 256 0 0 1 : 252 126 size-256 534 660 256 37 44 1 : 252 126 size-128(DMA) 0 0 128 0 0 1 : 252 126 size-128 870 870 128 29 29 1 : 252 126 size-64(DMA) 0 0 64 0 0 1 : 252 126 size-64 708 708 64 12 12 1 : 252 126 size-32(DMA) 0 0 32 0 0 1 : 252 126 size-32 1443 1695 32 15 15 1 : 252 126 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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