[ ssic-linux-Bugs-1652336 ] panic if try to readdir /proc before joining cluster

Bugs item #1652336, was opened at 2007-02-05 07:00
Message generated for change (Settings changed) made by rogertsang
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Category: Booting / init
Group: v1.9.2
>Status: Closed
>Resolution: Wont Fix
Priority: 2
Private: No
Submitted By: John Hughes (hughesj)
Assigned to: Nobody/Anonymous (nobody)
Summary: panic if try to readdir /proc before joining cluster

Initial Comment:
Doing a simple "echo /proc/*" panics the OpenSSI kernel if done from the initrd.  (for debugging for example).

The call trace is:

...
proc_pid_readir
ssig_get_tgid_list
clmns_get_nsc_nodelist
error_code
...
die.

I'd guess we're hitting the SSI_ASSERT(tnlist) in clms_get_nsc_nodelist around ./ci/kernel/cluster/clms/clms_mgmt.c:2425

Maybe not terribly important, but irritating.


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Comment By: Roger Tsang (rogertsang)
Date: 2008-04-10 01:48

Message:
Logged In: YES 
user_id=1246761
Originator: NO

In other words use /bin/localview or delay whatever you are doing after
pre-root cluster initialization.

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

Comment By: John Hughes (hughesj)
Date: 2008-04-09 11:14

Message:
Logged In: YES 
user_id=166336
Originator: YES

Actually it's blowing up because the clms locks &c haven't been set up
yet:

kernel BUG at include/asm/spinlock.h:136!
invalid operand: 0000 [#1]
[...]
Stack traceback for pid 2
0xc13df670        2        0  1    0   R  0xc13df840 *sh
EBP        EIP        Function (args)
0xc13b7e14 0xc0473c29 _spin_lock+0x39 (0x0, 0xc13b7e3c, 0xc020089d, 0x4,
0x8061b2f)
           0xc020089d clms_get_nsc_nodelist+0x2d (0x190, 0xc0188215,
0x8061b2f, 0xc04982a6, 0x4)
0xc13b7e90 0xc024fa28 ssi_get_tgid_list+0x58 (0xc13ab7e0, 0x1, 0xc13b7ed8,
0x100, 0x0)
0xc13b7f34 0xc01af67f proc_pid_readdir+0x6f (0xc13ab7e0, 0xc13b7f98,
0xc0188070, 0xfffffffe, 0xc13bdd50)
0xc13b7f54 0xc01ac344 proc_root_readdir+0x64 (0xc13ab7e0, 0xc13b7f98,
0xc0188070, 0xc13bddc8, 0xc13b7000)
0xc13b7f78 0xc0187a2c vfs_readdir+0xbc (0xc13ab7e0, 0xc0188070,
0xc13b7f98, 0xc13ab7e0, 0x24)
0xc13b7fb4 0xc01883f9 sys_getdents64+0x79
           0xc0106a41 syscall_call+0x7

Should maybe be pretending we're in localview mode before cluster code is
initialised.


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