From: Eric Dumazet <eric.dumazet@gmail.com>
To: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>,
LKML <linux-kernel@vger.kernel.org>,
netdev@vger.kernel.org, Satyam Sharma <satyam@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
intel-wired-lan@lists.osuosl.org,
Ye Xiaolong <xiaolong.ye@intel.com>
Subject: Re: [e1000_netpoll] BUG: sleeping function called from invalid context at kernel/irq/manage.c:110
Date: Thu, 28 Jul 2016 07:43:55 +0200 [thread overview]
Message-ID: <1469684635.9389.4.camel@edumazet-glaptop3.roam.corp.google.com> (raw)
In-Reply-To: <1469655487.2232.49.camel@intel.com>
On Wed, 2016-07-27 at 14:38 -0700, Jeff Kirsher wrote:
> On Tue, 2016-07-26 at 11:14 +0200, Eric Dumazet wrote:
> > Could you try this ?
> >
> > diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c
> > b/drivers/net/ethernet/intel/e1000/e1000_main.c
> > index
> > f42129d09e2c23ba9fdb5cde890d50ecb7166a42..a53c41c4c4f7d1fe52f95a2cab8784a
> > 938b3820b 100644
> > --- a/drivers/net/ethernet/intel/e1000/e1000_main.c
> > +++ b/drivers/net/ethernet/intel/e1000/e1000_main.c
> > @@ -5257,9 +5257,13 @@ static void e1000_netpoll(struct net_device
> > *netdev)
> > {
> > struct e1000_adapter *adapter = netdev_priv(netdev);
> >
> > - disable_irq(adapter->pdev->irq);
> > - e1000_intr(adapter->pdev->irq, netdev);
> > - enable_irq(adapter->pdev->irq);
> > + if (napi_schedule_prep(&adapter->napi)) {
> > + adapter->total_tx_bytes = 0;
> > + adapter->total_tx_packets = 0;
> > + adapter->total_rx_bytes = 0;
> > + adapter->total_rx_packets = 0;
> > + __napi_schedule(&adapter->napi);
> > + }
> > }
> > #endif
> >
>
> Since this fixes the issue Fengguang saw, will you be submitting a formal
> patch Eric? (please) I can get this queued up for Dave's net tree as soon
> as I receive the formal patch.
I would prefer having a definitive advice from Thomas Gleixner and/or
others if disable_irq() is forbidden from IRQ path.
As I said, about all netpoll() methods in net drivers use disable_irq()
so a lot of patches would be needed.
disable_irq() should then test this condition earlier, so that we can
detect potential bug, even if the IRQ is not (yet) threaded.
Thanks.
next prev parent reply other threads:[~2016-07-28 5:44 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-26 3:50 [e1000_netpoll] BUG: sleeping function called from invalid context at kernel/irq/manage.c:110 Fengguang Wu
2016-07-26 9:14 ` Eric Dumazet
[not found] ` <20160726093224.GA10339@wfg-t540p.sh.intel.com>
2016-07-26 9:45 ` [PATCH] schedule function called for e1000 driver interrupt kbuild test robot
2016-07-26 9:50 ` [e1000_netpoll] BUG: sleeping function called from invalid context at kernel/irq/manage.c:110 Thomas Gleixner
[not found] ` <8578bb16-cd04-e8a5-c7f4-be061ede95b4@gmail.com>
2016-07-28 7:45 ` Thomas Gleixner
2016-07-28 9:46 ` Valdis.Kletnieks
2016-07-26 9:50 ` [PATCH] schedule function called for e1000 driver interrupt kbuild test robot
2016-07-26 15:32 ` [e1000_netpoll] BUG: sleeping function called from invalid context at kernel/irq/manage.c:110 Fengguang Wu
2016-07-26 16:28 ` Eric Dumazet
2016-07-27 15:01 ` Fengguang Wu
2016-07-27 18:50 ` Eric Dumazet
2016-07-27 21:38 ` Jeff Kirsher
2016-07-28 5:43 ` Eric Dumazet [this message]
2016-07-28 10:19 ` Sabrina Dubroca
2016-07-28 12:21 ` Thomas Gleixner
2016-07-28 13:30 ` Fengguang Wu
2016-07-28 23:28 ` [Intel-wired-lan] " Francois Romieu
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