From: Ben Hutchings <bhutchings@solarflare.com>
Date: Fri, 20 Mar 2009 13:30:37 +0000 (+0000)
Subject: sfc: Implement adaptive IRQ moderation
X-Git-Tag: v2.6.30-rc1~662^2~140
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6fb70fd1b57707a5c7b9fb167b7790b2cba13f04;p=pandora-kernel.git

sfc: Implement adaptive IRQ moderation

Calculate a score for each 1000 IRQs:
- TX completions are worth 1 point
- RX completions are worth 4 if merged using LRO or 2 otherwise

Reduce moderation if the score is less than 10000, down to a minimum
of 5 us.  Increase moderation if the score is more than 20000, up to
the specified maximum.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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