problem with nfs ls latency during high IO

[Judith Flo Gaya]

On 03/15/2011 02:29 PM, Michael Cronenworth wrote:

>> What do you suggest? Shall I compile the new kernel?
>
> No. I was providing you a link I was hoping you would investigate on
> your own. Browsing gitweb is easy. Fedora 14 uses 2.6.35 and it also[1]
> includes the same code.
I browsed the code, but I can't see from what I read that the change was 
applied on my current working version (2.6.35) and the rest as they look 
very similar to me.
If that is the case and the patch is applied, then why is the behavior 
so different between red hat and fedora? Why has the code changed so 
much between the two kernels?

>
>>
>> I have to put this server on production soon and I dont't want my clients to get stuck like this ;(
>
> Then you should buy a Red Hat subscription and open a support ticket.
It already works fine with red hat 6, my issue is with fedora.
The longest hang for red hat had been 40s, with fedora I have minutes of 
delay. I know I can buy Red had subscriptions but I need the fast 
updates from fedora.
>
>>
>> Thanks a lot anyway!
>
>
> [1]
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=fs/nfs/inode.c;h=099b3518feea6409861c55e7ca7a5fbe421c0125;hb=9fe6206f400646a2322096b56c59891d530e8d51#l495

I'm sorry if my questions seems to be rather stupid, I'm not very 
skilled with the kernel-code related issues.

Thanks again,
j