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Date: Fri, 01 Mar 2013 21:21:31 -0800
From: Linda Walsh <lkml@...nx.org>
To: Eric Dumazet <eric.dumazet@...il.com>
CC: Linux-Kernel <linux-kernel@...r.kernel.org>,
netdev <netdev@...r.kernel.org>, Jay Vosburgh <fubar@...ibm.com>,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
Cong Wang <xiyou.wangcong@...il.com>
Subject: Re: upgrade to 3.8.1 : BUG Scheduling while atomic in bonding driver:
Linda Walsh wrote:
>
>
> This patch is not in the latest kernel. I don't know if it is the
> 'best' way, but it does stop BUG error messages.
---
Update -- it *used* to stop the messages in 3.6.7.
It no longer stops the messages in 3.8.1 -- (and isn't present by
default -- tried
adding the unlock/lock -- no difference.
Weird. *sigh*
>
>
> -------- Original Message --------
> Subject: Re: BUG: scheduling while atomic:
> ifup-bonding/3711/0x00000002 -- V3.6.7
> Date: Wed, 28 Nov 2012 13:17:31 -0800
> From: Linda Walsh <lkml@...nx.org>
> To: Cong Wang <xiyou.wangcong@...il.com>
> CC: LKML <linux-kernel@...r.kernel.org>, Linux Kernel Network
> Developers <netdev@...r.kernel.org>
> References: <50B5248A.5010908@...nx.org>
> <CAM_iQpUW2Oz9p0K0gGKc6JoD7WAu0kJtRa4uBSe+WfXg0Nn3jA@...l.gmail.com>
>
>
>
> Cong Wang wrote:
>> Does this quick fix help?
>> diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
>> index 5f5b69f..4a4d9eb 100644
>> --- a/drivers/net/bonding/bond_main.c
>> +++ b/drivers/net/bonding/bond_main.c
>> @@ -1785,7 +1785,9 @@ int bond_enslave(struct net_device *bond_dev,
>> struct net_device *slave_dev)
>> new_slave->link == BOND_LINK_DOWN ? "DOWN" :
>> (new_slave->link == BOND_LINK_UP ? "UP" : "BACK"));
>>
>> + read_unlock(&bond->lock);
>> bond_update_speed_duplex(new_slave);
>> + read_lock(&bond->lock);
>>
>> if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
>> /* if there is a primary slave, remember it */
>>
>> Thanks!
>>
>
>
>
>
> Eric Dumazet wrote:
>> On Fri, 2013-03-01 at 00:15 -0800, Linda Walsh wrote:
>>
>>> Just installed 3.8.1....
>>>
>>> Thought this had been fixed? Note it causes the kernel to
>>> show up as tainted after the 1st...
>>>
>>>
>>
>> CC netdev & Jay Vosburgh & Jeff Kirsher
>>
>>
>>> As the system was coming up and initializing the bond0 driver:
>>>
>>>
>>> [ 19.847743] ixgbe 0000:06:00.0: registered PHC device on eth_s2_0
>>> [ 20.258245] BUG: scheduling while atomic: ifup-bonding/2003/0x00000002
>>> [ 20.264812] 4 locks held by ifup-bonding/2003:
>>> [ 20.269298] #0: (&buffer->mutex){......}, at: [<ffffffff811c401f>]
>>> sysfs_write_file+0x3f/0x150
>>> [ 20.278319] #1: (s_active#59){......}, at: [<ffffffff811c409b>]
>>> sysfs_write_file+0xbb/0x150
>>> [ 20.287088] #2: (rtnl_mutex){......}, at: [<ffffffff81590bf0>]
>>> rtnl_trylock+0x10/0x20
>>> [ 20.295373] #3: (&bond->lock){......}, at: [<ffffffff8145be6f>]
>>> bond_enslave+0x4ef/0xb80
>>> [ 20.303912] Modules linked in: iptable_filter kvm_intel kvm acpi_cpufreq
>>> mperf button processor mousedev iTCO_wdt
>>> [ 20.314695] Pid: 2003, comm: ifup-bonding Not tainted 3.8.1-Isht-Van #5
>>> [ 20.321340] Call Trace:
>>> [ 20.323833] [<ffffffff8162b029>] __schedule_bug+0x5e/0x6c
>>> [ 20.329356] [<ffffffff81634592>] __schedule+0x762/0x7f0
>>> [ 20.334701] [<ffffffff81634734>] schedule+0x24/0x70
>>> [ 20.339703] [<ffffffff816336f4>] schedule_hrtimeout_range_clock+0xa4/0x130
>>> [ 20.346699] [<ffffffff81068250>] ? update_rmtp+0x60/0x60
>>> [ 20.352130] [<ffffffff81068f9f>] ? hrtimer_start_range_ns+0xf/0x20
>>> [ 20.358434] [<ffffffff8163378e>] schedule_hrtimeout_range+0xe/0x10
>>> [ 20.364734] [<ffffffff8104ec1b>] usleep_range+0x3b/0x40
>>> [ 20.370082] [<ffffffff814b2d7c>] ixgbe_acquire_swfw_sync_X540+0xbc/0x100
>>> [ 20.376905] [<ffffffff814aeb0d>] ixgbe_read_phy_reg_generic+0x3d/0x140
>>> [ 20.383553] [<ffffffff814aedac>]
>>> ixgbe_get_copper_link_capabilities_generic+0x2c/0x60
>>> [ 20.391499] [<ffffffff8145be6f>] ? bond_enslave+0x4ef/0xb80
>>> [ 20.397194] [<ffffffff814a64e4>] ixgbe_get_settings+0x34/0x340
>>> [ 20.403148] [<ffffffff81586ab8>] __ethtool_get_settings+0x88/0x130
>>> [ 20.409448] [<ffffffff814568a3>] bond_update_speed_duplex+0x23/0x60
>>> [ 20.415833] [<ffffffff8145bed9>] bond_enslave+0x559/0xb80
>>> [ 20.421356] [<ffffffff8146454f>] bonding_store_slaves+0x16f/0x1c0
>>> [ 20.427569] [<ffffffff813bfb83>] dev_attr_store+0x13/0x30
>>> [ 20.433091] [<ffffffff811c40b4>] sysfs_write_file+0xd4/0x150
>>> [ 20.438872] [<ffffffff81154b81>] vfs_write+0xb1/0x190
>>> [ 20.444047] [<ffffffff81154ee0>] sys_write+0x50/0xa0
>>> [ 20.449137] [<ffffffff81637092>] system_call_fastpath+0x16/0x1b
>>> [ 20.455264] BUG: scheduling while atomic: ifup-bonding/2003/0x00000002
>>> [ 20.461851] 4 locks held by ifup-bonding/2003:
>>> [ 20.466334] #0: (&buffer->mutex){......}, at: [<ffffffff811c401f>]
>>> sysfs_write_file+0x3f/0x150
>>> [ 20.475356] #1: (s_active#59){......}, at: [<ffffffff811c409b>]
>>> sysfs_write_file+0xbb/0x150
>>> [ 20.484117] #2: (rtnl_mutex){......}, at: [<ffffffff81590bf0>]
>>> rtnl_trylock+0x10/0x20
>>> [ 20.492403] #3: (&bond->lock){......}, at: [<ffffffff8145be6f>]
>>> bond_enslave+0x4ef/0xb80
>>> [ 20.500902] Modules linked in: iptable_filter kvm_intel kvm acpi_cpufreq
>>> mperf button processor mousedev iTCO_wdt
>>> [ 20.511640] Pid: 2003, comm: ifup-bonding Tainted: G W
>>> 3.8.1-Isht-Van #5
>>> [ 20.519240] Call Trace:
>>> [ 20.521729] [<ffffffff8162b029>] __schedule_bug+0x5e/0x6c
>>> [ 20.527251] [<ffffffff81634592>] __schedule+0x762/0x7f0
>>> [ 20.532599] [<ffffffff81634734>] schedule+0x24/0x70
>>> [ 20.537599] [<ffffffff816336f4>] schedule_hrtimeout_range_clock+0xa4/0x130
>>> [ 20.544592] [<ffffffff81068250>] ? update_rmtp+0x60/0x60
>>> [ 20.550026] [<ffffffff81068250>] ? update_rmtp+0x60/0x60
>>> [ 20.555462] [<ffffffff81068f9f>] ? hrtimer_start_range_ns+0xf/0x20
>>> [ 20.561763] [<ffffffff8163378e>] schedule_hrtimeout_range+0xe/0x10
>>> [ 20.568064] [<ffffffff8104ec1b>] usleep_range+0x3b/0x40
>>> [ 20.573415] [<ffffffff814b2cae>] ixgbe_release_swfw_sync_X540+0x4e/0x60
>>> [ 20.580146] [<ffffffff814aebdd>] ixgbe_read_phy_reg_generic+0x10d/0x140
>>> [ 20.586960] [<ffffffff814aedac>]
>>> ixgbe_get_copper_link_capabilities_generic+0x2c/0x60
>>> [ 20.594908] [<ffffffff8145be6f>] ? bond_enslave+0x4ef/0xb80
>>> [ 20.600601] [<ffffffff814a64e4>] ixgbe_get_settings+0x34/0x340
>>> [ 20.606557] [<ffffffff81586ab8>] __ethtool_get_settings+0x88/0x130
>>> [ 20.612858] [<ffffffff814568a3>] bond_update_speed_duplex+0x23/0x60
>>> [ 20.619244] [<ffffffff8145bed9>] bond_enslave+0x559/0xb80
>>> [ 20.624767] [<ffffffff8146454f>] bonding_store_slaves+0x16f/0x1c0
>>> [ 20.630983] [<ffffffff813bfb83>] dev_attr_store+0x13/0x30
>>> [ 20.636503] [<ffffffff811c40b4>] sysfs_write_file+0xd4/0x150
>>> [ 20.642283] [<ffffffff81154b81>] vfs_write+0xb1/0x190
>>> [ 20.647462] [<ffffffff81154ee0>] sys_write+0x50/0xa0
>>> [ 20.652548] [<ffffffff81637092>] system_call_fastpath+0x16/0x1b
>>> [ 20.658696] bonding: bond0: enslaving eth_s2_0 as an active interface with a
>>> down link.
>>> [ 20.676577] bonding: bond0: Adding slave eth_s2_1.
>>> [ 20.743760] pps pps1: new PPS source ptp1
>>> [ 20.747792] ixgbe 0000:06:00.1: registered PHC device on eth_s2_1
>>> [ 21.150267] BUG: scheduling while atomic: ifup-bonding/2003/0x00000002
>>> [ 21.156836] 4 locks held by ifup-bonding/2003:
>>> [ 21.161319] #0: (&buffer->mutex){......}, at: [<ffffffff811c401f>]
>>> sysfs_write_file+0x3f/0x150
>>> [ 21.170388] #1: (s_active#59){......}, at: [<ffffffff811c409b>]
>>> sysfs_write_file+0xbb/0x150
>>> [ 21.179149] #2: (rtnl_mutex){......}, at: [<ffffffff81590bf0>]
>>> rtnl_trylock+0x10/0x20
>>> [ 21.187403] #3: (&bond->lock){......}, at: [<ffffffff8145be6f>]
>>> bond_enslave+0x4ef/0xb80
>>> [ 21.195904] Modules linked in: iptable_filter kvm_intel kvm acpi_cpufreq
>>> mperf button processor mousedev iTCO_wdt
>>> [ 21.206644] Pid: 2003, comm: ifup-bonding Tainted: G W
>>> 3.8.1-Isht-Van #5
>>> [ 21.214240] Call Trace:
>>> [ 21.216732] [<ffffffff8162b029>] __schedule_bug+0x5e/0x6c
>>> [ 21.222254] [<ffffffff81634592>] __schedule+0x762/0x7f0
>>> [ 21.227604] [<ffffffff81634734>] schedule+0x24/0x70
>>> [ 21.232606] [<ffffffff816336f4>] schedule_hrtimeout_range_clock+0xa4/0x130
>>> [ 21.239601] [<ffffffff81068250>] ? update_rmtp+0x60/0x60
>>> [ 21.245033] [<ffffffff81068f9f>] ? hrtimer_start_range_ns+0xf/0x20
>>> [ 21.251339] [<ffffffff8163378e>] schedule_hrtimeout_range+0xe/0x10
>>> [ 21.257635] [<ffffffff8104ec1b>] usleep_range+0x3b/0x40
>>> [ 21.262987] [<ffffffff814b2d7c>] ixgbe_acquire_swfw_sync_X540+0xbc/0x100
>>> [ 21.269811] [<ffffffff814aeb0d>] ixgbe_read_phy_reg_generic+0x3d/0x140
>>> [ 21.276461] [<ffffffff814aedac>]
>>> ixgbe_get_copper_link_capabilities_generic+0x2c/0x60
>>> [ 21.284409] [<ffffffff8145be6f>] ? bond_enslave+0x4ef/0xb80
>>> [ 21.290106] [<ffffffff814a64e4>] ixgbe_get_settings+0x34/0x340
>>> [ 21.296067] [<ffffffff81586ab8>] __ethtool_get_settings+0x88/0x130
>>> [ 21.302369] [<ffffffff814568a3>] bond_update_speed_duplex+0x23/0x60
>>> [ 21.308754] [<ffffffff8145bed9>] bond_enslave+0x559/0xb80
>>> [ 21.314278] [<ffffffff8146454f>] bonding_store_slaves+0x16f/0x1c0
>>> [ 21.320491] [<ffffffff813bfb83>] dev_attr_store+0x13/0x30
>>> [ 21.326009] [<ffffffff811c40b4>] sysfs_write_file+0xd4/0x150
>>> [ 21.331793] [<ffffffff81154b81>] vfs_write+0xb1/0x190
>>> [ 21.336964] [<ffffffff81154ee0>] sys_write+0x50/0xa0
>>> [ 21.342053] [<ffffffff81637092>] system_call_fastpath+0x16/0x1b
>>> [ 21.348191] BUG: scheduling while atomic: ifup-bonding/2003/0x00000002
>>> [ 21.354775] 4 locks held by ifup-bonding/2003:
>>> [ 21.359258] #0: (&buffer->mutex){......}, at: [<ffffffff811c401f>]
>>> sysfs_write_file+0x3f/0x150
>>> [ 21.368283] #1: (s_active#59){......}, at: [<ffffffff811c409b>]
>>> sysfs_write_file+0xbb/0x150
>>> [ 21.377104] #2: (rtnl_mutex){......}, at: [<ffffffff81590bf0>]
>>> rtnl_trylock+0x10/0x20
>>> [ 21.385343] #3: (&bond->lock){......}, at: [<ffffffff8145be6f>]
>>> bond_enslave+0x4ef/0xb80
>>> [ 21.393887] Modules linked in: iptable_filter kvm_intel kvm acpi_cpufreq
>>> mperf button processor mousedev iTCO_wdt
>>> [ 21.404575] Pid: 2003, comm: ifup-bonding Tainted: G W
>>> 3.8.1-Isht-Van #5
>>> [ 21.412176] Call Trace:
>>> [ 21.414666] [<ffffffff8162b029>] __schedule_bug+0x5e/0x6c
>>> [ 21.420188] [<ffffffff81634592>] __schedule+0x762/0x7f0
>>> [ 21.425536] [<ffffffff81634734>] schedule+0x24/0x70
>>> [ 21.430541] [<ffffffff816336f4>] schedule_hrtimeout_range_clock+0xa4/0x130
>>> [ 21.437532] [<ffffffff81068250>] ? update_rmtp+0x60/0x60
>>> [ 21.442967] [<ffffffff81068250>] ? update_rmtp+0x60/0x60
>>> [ 21.448407] [<ffffffff81068f9f>] ? hrtimer_start_range_ns+0xf/0x20
>>> [ 21.454712] [<ffffffff8163378e>] schedule_hrtimeout_range+0xe/0x10
>>> [ 21.461015] [<ffffffff8104ec1b>] usleep_range+0x3b/0x40
>>> [ 21.466370] [<ffffffff814b2cae>] ixgbe_release_swfw_sync_X540+0x4e/0x60
>>> [ 21.473105] [<ffffffff814aebdd>] ixgbe_read_phy_reg_generic+0x10d/0x140
>>> [ 21.479843] [<ffffffff814aedac>]
>>> ixgbe_get_copper_link_capabilities_generic+0x2c/0x60
>>> [ 21.487787] [<ffffffff8145be6f>] ? bond_enslave+0x4ef/0xb80
>>> [ 21.493513] [<ffffffff814a64e4>] ixgbe_get_settings+0x34/0x340
>>> [ 21.499468] [<ffffffff81586ab8>] __ethtool_get_settings+0x88/0x130
>>> [ 21.505767] [<ffffffff814568a3>] bond_update_speed_duplex+0x23/0x60
>>> [ 21.512153] [<ffffffff8145bed9>] bond_enslave+0x559/0xb80
>>> [ 21.517677] [<ffffffff8146454f>] bonding_store_slaves+0x16f/0x1c0
>>> [ 21.523889] [<ffffffff813bfb83>] dev_attr_store+0x13/0x30
>>> [ 21.529412] [<ffffffff811c40b4>] sysfs_write_file+0xd4/0x150
>>> [ 21.535193] [<ffffffff81154b81>] vfs_write+0xb1/0x190
>>> [ 21.540373] [<ffffffff81154ee0>] sys_write+0x50/0xa0
>>> [ 21.545463] [<ffffffff81637092>] system_call_fastpath+0x16/0x1b
>>> --
>>>
>>
>>
>
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