linux-kernel - Re: [PATCH RFC 0/2] Optimize the snmp stat aggregation for large cpus

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Date:	Tue, 25 Aug 2015 16:07:30 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	raghavendra.kt@...ux.vnet.ibm.com
Cc:	kuznet@....inr.ac.ru, jmorris@...ei.org, yoshfuji@...ux-ipv6.org,
	kaber@...sh.net, jiri@...nulli.us, edumazet@...gle.com,
	hannes@...essinduktion.org, tom@...bertland.com, azhou@...ira.com,
	ebiederm@...ssion.com, ipm@...rality.org.uk,
	nicolas.dichtel@...nd.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, anton@....ibm.com,
	nacc@...ux.vnet.ibm.com, srikar@...ux.vnet.ibm.com
Subject: Re: [PATCH RFC 0/2] Optimize the snmp stat aggregation for large
 cpus

From: Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>
Date: Tue, 25 Aug 2015 13:24:24 +0530

> Please let me know if you have suggestions/comments.

Like Eric Dumazet said the idea is good but needs some adjustments.

You might want to see whether a per-cpu work buffer works for this.

It's extremely unfortunately that we can't depend upon the destination
buffer being properly aligned, because we wouldn't need a temporary
scratch area if it were aligned properly.
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