[CentOS] Odd INFO "120 seconds" in logs for 2.6.18-194.3.1

[Tsuyoshi Nagata]

Hi
(2010/06/08 5:12), Steve Brooks wrote:
> Jun  7 19:45:21 sraid3 kernel:  [<ffffffff800ec2a2>] inode_wait+0x0/0xd
> Jun  7 19:45:21 sraid3 kernel:  [<ffffffff80063ab0>]
> out_of_line_wait_on_bit+0x6c/0x78
> Jun  7 19:45:21 sraid3 kernel:  [<ffffffff800a0aec>]
> wake_bit_function+0x0/0x23
> Jun  7 19:45:21 sraid3 kernel:  [<ffffffff8003dbbf>] ifind_fast+0x6e/0x83

This message was created at Linux/fs/inode.c:ifind_fast()
The source code was bellows,

Linux/fs/inode.c:
912 static struct inode *ifind_fast(struct super_block *sb,
913                 struct hlist_head *head, unsigned long ino)
914 {
915         struct inode *inode;
916
917  *LOCK* spin_lock(&inode_lock);                 <= This takes
918         inode = find_inode_fast(sb, head, ino); <=  more 120s.
919         if (inode) {
920                 __iget(inode);
921   *UNLOCK*      spin_unlock(&inode_lock);
922                 wait_on_inode(inode);
923                 return inode;
924         }
925         spin_unlock(&inode_lock);
926         return NULL;
927 }
928

I guess your your file system has a trouble with i-node(file number) resources.
CAUSES:
       Hard Disk trouble (bit error/raid trouble.)
       i-node trouble (overflow. etc.)
       Memory/CPU trouble(&inode_lock)

Buy Fresh Hard disks& rebuild them is convenience way.
Or memtest86 can finds DIMM trouble.(or CPU, mother board)
Or ext4 bug in 194.3.1 kernel, back to ext3!

-tsuyoshi