From: "David S. Miller" <davem@davemloft.net>
To: Lee Revell <rlrevell@joe-job.com>
Cc: herbert@gondor.apana.org.au, vda@port.imtp.ilyichevsk.odessa.ua,
netdev@oss.sgi.com, linux-kernel@vger.kernel.org,
maxk@qualcomm.com, irda-users@lists.sourceforge.net
Subject: Re: tun.c patch to fix "smp_processor_id() in preemptible code"
Date: Tue, 19 Oct 2004 15:33:08 -0700 [thread overview]
Message-ID: <20041019153308.488d34c1.davem@davemloft.net> (raw)
In-Reply-To: <1098223857.23367.35.camel@krustophenia.net>
On Tue, 19 Oct 2004 18:10:58 -0400
Lee Revell <rlrevell@joe-job.com> wrote:
> /*
> * Since receiving is always initiated from a tasklet (in iucv.c),
> * we must use netif_rx_ni() instead of netif_rx()
> */
>
> This implies that the author thought it was a matter of correctness to
> use netif_rx_ni vs. netif_rx. But it looks like the only difference is
> that the former sacrifices preempt-safety for performance.
You can't really delete netif_rx_ni(), so if there is a preemptability
issue, just add the necessary preemption protection around the softirq
checks.
next prev parent reply other threads:[~2004-10-19 22:33 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1097876587.4170.16.camel@marvin.home.parkautomat.net>
[not found] ` <1097879702.6737.7.camel@krustophenia.net>
[not found] ` <200410172314.38597.vda@port.imtp.ilyichevsk.odessa.ua>
2004-10-19 18:31 ` tun.c patch to fix "smp_processor_id() in preemptible code" Lee Revell
2004-10-19 21:35 ` Herbert Xu
2004-10-19 21:51 ` Lee Revell
2004-10-19 21:54 ` Herbert Xu
2004-10-19 22:10 ` Lee Revell
2004-10-19 22:33 ` David S. Miller [this message]
2004-10-19 22:42 ` Lee Revell
2004-10-19 22:42 ` David S. Miller
2004-10-19 22:51 ` Lee Revell
2004-10-20 0:44 ` David S. Miller
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