Re: [RFC:PATCH 3.1.0] do_mount: Add mount retry option for nfs root mount.

[Boaz Harrosh <bharrosh@panasas.com>]

On 01/26/2012 09:56 AM, Srinivas KANDAGATLA wrote:
> Jim Rees wrote:
>> Srinivas KANDAGATLA wrote:
>>
>>   From: Srinivas Kandagatla <srinivas.kandagatla@st.com>
>>   
>>   This patch adds mountretry kernel parameter for nfs root mount.
>>   mount retry indicates the number of times nfs root mount attempts to be
>>   made before giving up. If this option is not specified, the default
>>   value of 3 retries is used.
>>
>> This has already been fixed in commit 43717c7d, "NFS: Retry mounting
>> NFSROOT".  The retry count is fixed at 5.  Is there some reason you think
>> the retry count should be configurable?
>>   
> Thanks for pointing to the fixed commit. I did realize soon after
> sending this patch to mailing list.
> 
> Only reason I can think of having retry count configurable is, an
> arbitrary number(3 or 5 or n) of retry count may not be enough to
> address all the use cases.
> So, I think the user should be given a chance to configure the retry
> count if he wish to, either timeout quickly and try the succession
> root-mount or If he wish to keep kernel trying very harder till he gets
> the NFS root mount successful.
> 

I agree. Specially if there is no "succession root-mount" setup then user
can specify a very large count.

Is there some delay between retries. So not to burn 100% power?

> Thanks,
> srini

Thanks
Boaz

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