Re: [LTP] [QUESTION] ltp stress test for RHEL5 and NFS local mount

[Chen Gang <gang.chen@asianux.com>]

于 2012年09月02日 17:28, Garrett Cooper 写道:
> On Sat, Sep 1, 2012 at 10:30 PM, gchen <gang.chen@asianux.com> wrote:
>> Hello ltp-list@lists.sourceforge.net
>>
>>
>> Question:
>>
>> Use ltp stress test (/opt/ltp/ltpstress.sh) with ltp-full-20100331.gz
>> to test RHEL5 (kernel-2.6.18-308.4.1.el5) for 72 hours.
>>
>> Not give any more configurations for NFS (using default configuration:
>> mount NFS locally, so the NFS client and NFS server are on the same
>> machine).
>>
>> My question is that "for stress test, is it suitable to let NFS server and
>> client on the same machine ?"
>>
>>
>> Background;
>>
>> This configuration will cause deadlock for RHEL5, and can not boot
>> machine in normal way.
>>
>> someone from Red Hat has said that:
>> --------------------------------------------------------------------------------------------------------------
>>
>> "Have configuration where the same host is acting as both NFS client
>> and server. That's a configuration known to cause deadlocks."
>>
>> --------------------------------------------------------------------------------------------------------------
>>
>> can reference Red Hat Bugzilla (bug 848706) for more details.
>     I've done that occasionally on FreeBSD (mount over nfs into a
> chroot) before I discovered nullfs (sort of like the unionfs
> equivalent on *BSD), but I didn't stress the system. It's an
> interesting scenario, but I would say that this is more of a fringe
> case than something that one would normally do.
>     If it helps you better isolate an issue that occurs in scenarios
> where the NFS client/server are separate from one another, I'd say go
> for it.
> Cheers,
> -Garrett
>
>

Thank you for your reply.

It will be better if I can get more confirmation from LTP mailing list.

I think;
If we use /opt/ltp/testscript/ltpstress.sh directly, it will use NFS
local mount for stress test.


If no additional reply within this week, I will believe the conclusion
from Red Hat:


-- 
Chen Gang

Asianux Corporation


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