netdev - Re: Receive processing stops when dev->poll returns 1

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20100805092243.41671259@nehalam>
Date:	Thu, 5 Aug 2010 09:22:43 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Usha Srinivasan <usha.srinivasan@...gic.com>
Cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: Receive processing stops when dev->poll returns 1

On Thu, 5 Aug 2010 11:11:51 -0500
Usha Srinivasan <usha.srinivasan@...gic.com> wrote:

> Thanks for your response. What you said is exactly what my driver is doing:
> 
> 
> <= 2.6.23 
> Calls netif_rx_complete if done < budget; decrements quota & *budget by done; returns 0 if done < budget and 1 otherwise.
> 
> When 1 is returned, I encounter the problem I described)
> 
> > 2.6.23
> Calls napi-complete if done < budget; returns done.
> 
> When done==budget, I encounter the problem I described.
> 
> Any ideas?

Ignore last mail...

If you done == budget, the poll will be recalled (after other drivers).
If quantum exhausts, then it gets called it gets deferred to ksoftirq
thread.

One possibility is that the driver is looking at wrong parameter
for budget and is exceeding the requested value. Please post your code.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html