netdev - Re: [PATCH 2/10 REV5] [core] Add skb

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Date:	Mon, 17 Sep 2007 09:21:45 +0530
From:	Krishna Kumar2 <krkumar2@...ibm.com>
To:	Evgeniy Polyakov <johnpol@....mipt.ru>
Cc:	davem@...emloft.net, gaagaan@...il.com,
	general@...ts.openfabrics.org, hadi@...erus.ca,
	herbert@...dor.apana.org.au, jagana@...ibm.com, jeff@...zik.org,
	kaber@...sh.net, kumarkr@...ux.ibm.com, mcarlson@...adcom.com,
	mchan@...adcom.com, netdev@...r.kernel.org,
	peter.p.waskiewicz.jr@...el.com, randy.dunlap@...cle.com,
	rdreier@...co.com, rick.jones2@...com, Robert.Olsson@...a.slu.se,
	shemminger@...ux-foundation.org, sri@...ibm.com, tgraf@...g.ch,
	xma@...ibm.com
Subject: Re: [PATCH 2/10 REV5] [core] Add skb_blist & support for batching

Hi Evgeniy,

Evgeniy Polyakov <johnpol@....mipt.ru> wrote on 09/14/2007 06:16:38 PM:

> > +   if (dev->features & NETIF_F_BATCH_SKBS) {
> > +      /* Driver supports batching skb */
> > +      dev->skb_blist = kmalloc(sizeof *dev->skb_blist, GFP_KERNEL);
> > +      if (dev->skb_blist)
> > +         skb_queue_head_init(dev->skb_blist);
> > +   }
> > +
>
> A nitpick is that you should use sizeof(struct ...) and I think it
> requires flag clearing in cae of failed initialization?

I thought it is better to use *var name in case the name of the structure
changes. Also, the flag is not cleared since I could try to enable batching
later, and it could succeed at that time. When skb_blist is allocated, then
batching is enabled otherwise it is disabled (while features flag just
indicates that driver supports batching).

Thanks,

- KK

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