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

From: Shan Wei <[email-masked]>
Date: Fri, 27 Apr 2012 17:31:22 +0800

It's unconventional that "default" value  is greater than "max". :-(

net.core.rmem_max = 131071
net.core.rmem_default = 229376

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