Latest FC kernel still have SMP bugs?

Nigel Wade nmw at ion.le.ac.uk
Tue May 4 09:23:28 UTC 2004


Herbert Gasiorowski wrote:
>> I've built the RHEL3 kernel on FC1 and run the system up using this. 
>> Ordinary ldap requests seem quite happy, but I'm still seeing the 
>> futex lock problem with nss_ldap. E.g. when I add 'hosts: files ldap 
>> dns' to /etc/nsswitch.conf I get:
>>
>> # strace ping host
>> munmap(0xb75ff000, 4096)                = 0
>> uname({sys="Linux", node="hostname", ...}) = 0
>> futex(0x53e4ec, FUTEX_WAIT, 2, NULL
>>
>> Setting LD_ASSUME_KERNEL=2.4.1 cures this particular problem, but 
>> isn't a solution for a system relying on LDAP for all authentication 
>> and NSS functions.
> 
> 
> The problem remains in FC2 (Test 3) with the 2.6 kernel!
> 
> LD_ASSUME_KERNEL=2.4.1 seems to cure at least "ping host"
> 
> 

This is in some way related to nscd.

If nscd isn't running hosts don't resolve using LDAP. AFAIK, nscd should not 
be compulsory.

-- 
Nigel Wade, System Administrator, Space Plasma Physics Group,
             University of Leicester, Leicester, LE1 7RH, UK
E-mail :    nmw at ion.le.ac.uk
Phone :     +44 (0)116 2523548, Fax : +44 (0)116 2523555





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