Subject: Re: [BUG report] net.core.rmem_default is larger than net.core.rmem_max

From: Shan Wei <[email-masked]>
Date: Mon, 11 Jun 2012 10:06:03 +0800

Shan Wei said, at 2012/4/27 17:31:

> 
> It's unconventional that "default" value  is greater than "max". :-(
> 
> net.core.rmem_max = 131071
> net.core.rmem_default = 229376

ping......

I have no idea to fix this. 
Maybe add rmem_max value to be greater than rmem_default?
Eric, can you look into this?

> 
> net.core.wmem_max = 131071
> net.core.wmem_default = 229376
> 
> 
> And bisect the code to find the following commit caused this phenomenon.
> This patch increase SK_WMEM_MAX and SK_RMEM_MAX which are used to 
> initialize them.
> But rmem_max and wmem_max value are still be covered according the RAM size
> in sk_init().
> 
> 87fb4b7b533073eeeaed0b6bf7c2328995f6c075 is the first bad commit
> commit 87fb4b7b533073eeeaed0b6bf7c2328995f6c075
> Author: Eric Dumazet <[email-masked]>
> Date:   Thu Oct 13 07:28:54 2011 +0000
> 
>     net: more accurate skb truesize
> 
>