[OpenAFS-devel] anyone tried linux > 2.4.14?

[Neulinger, Nathan]

UP kernel didn't help, same hang.

-- Nathan

------------------------------------------------------------
Nathan Neulinger                       EMail:  nneul@umr.edu
University of Missouri - Rolla         Phone: (573) 341-4841
Computing Services                       Fax: (573) 341-4216


> -----Original Message-----
> From: Neulinger, Nathan 
> Sent: Tuesday, November 27, 2001 11:08 AM
> To: 'openafs-devel@openafs.org'
> Subject: [OpenAFS-devel] anyone tried linux > 2.4.14?
> 
> 
> I'm getting mysterious afs lockups with 2.4.15 or 2.4.16. 
> Nothing gets put
> in D state, the processes just appear to hang.
> 
> It looks to me like the process is spinning in a read and 
> sucking cpu like
> mad, but the syscall is never completing. Strace does no 
> output. The process
> is definately not killable. 
> 
> Interestingly, other afs accesses on the machine appear fine, 
> except if you
> try to ls the same directory that was being read when the 
> process hung, it
> will hang as well, so it's possible it's a directory read 
> that is failing,
> but it appears not:
> 
> Here is the tail end of an strace:
> 
> 
> 806   fstat64(3, {st_dev=makedev(0, 9), st_ino=2050626764,
> st_mode=S_IFREG|0755, st_nlink=1, st_uid=1, st_gid=0, st_blksize=4096,
> st_blocks=12, st_size=6083, st_atime=2001/10/26-09:24:37,
> st_mtime=2001/10/26-09:24:37, st_ctime=2001/10/26-09:24:37}) = 0
> 806   close(3)                          = 0
> 806
> lstat64("/umr/s/openafs/.oldfiles/openafs/src/WINNT/doc/instal
> l/Documentatio
> n/ja_JP/html/CmdRef/auarf131.htm", {st_dev=makedev(0, 9), 
> st_ino=2050626766,
> st_mode=S_IFREG|0755, st_nlink=1, st_uid=1, st_gid=0, st_blksize=4096,
> st_blocks=18, st_size=8538, st_atime=2001/10/26-09:24:37,
> st_mtime=2001/10/26-09:24:37, st_ctime=2001/10/26-09:24:37}) = 0
> 806
> open("/umr/s/openafs/.oldfiles/openafs/src/WINNT/doc/install/D
> ocumentation/j
> a_JP/html/CmdRef/auarf131.htm", O_RDONLY|O_LARGEFILE) = 3
> 806   write(1,
> "umr/s/openafs/.oldfiles/openafs/src/WINNT/doc/install/Documen
> tation/ja_JP/h
> tml/CmdRef/auarf131.htm\n", 99) = 99
> 806   read(3,
> 
> 
> Note the hang in the read. If I reboot and restart the tar, 
> it will hang
> somewhere else, usually further along.
> 
> This is on a clean 2.4.16 with only tiny local patches that 
> shouldn't have
> any impact. (Console blanking, semopm, and numfiles). It is 
> configured with
> highmem-4gb support, and is a SMP kernel, but on a UP box.
> 
> I'm going to try a UP kernel and see if that makes any 
> difference... (We've
> been trying to standardize on a single kernel build. Makes 
> managing lots of
> machines easier.)
> 
> Any ideas?
> 
> -- Nathan
> 
> ------------------------------------------------------------
> Nathan Neulinger                       EMail:  nneul@umr.edu
> University of Missouri - Rolla         Phone: (573) 341-4841
> Computing Services                       Fax: (573) 341-4216
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