>>>>> " " == Dave McCracken <dmccr@us.ibm.com> writes:
> --On Thursday, August 08, 2002 09:56:23 PM +0200 Trond
> Myklebust <trond.myklebust@fys.uio.no> wrote:
>> ... which begs the question: are you saying that there are no
>> SMP issues with CLONE_CRED and setting/reading the 'struct
>> cred' members?
> Yes, I'm saying there are no SMP issues with the shared cred
> structure. I looked for them and failed to find any.
> Credentials are not set cross-task, and are always done via
> atomic ops. I also failed to find any broader race conditions
> that would require a lock.
What if one thread is doing an RPC call while the other is changing
the 'groups' entry?
Given that the first thread wants both to copy and/or compare the
groups entry what prevents scenarios of the form?
Thread 1 Thread 2
change cred->ngroups
copy cred->ngroups
copy cred->groups
change cred->groups
Cheers,
Trond
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This archive was generated by hypermail 2b29 : Thu Aug 15 2002 - 22:00:17 EST