linux-kernel - 2.6.27-rc1-git4 BUG: sched while atomic

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Message-Id: <20080804094835.da083484.randy.dunlap@oracle.com>
Date:	Mon, 4 Aug 2008 09:48:35 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	lkml <linux-kernel@...r.kernel.org>
Cc:	netdev <netdev@...r.kernel.org>, mchan@...adcom.com
Subject: 2.6.27-rc1-git4 BUG: sched while atomic

Usually (e.g., in 2.6.27-rc1 & earlier), I see lots of these messages for
some reason:

tg3: eth2: Link is up at 1000 Mbps, full duplex.
tg3: eth2: Flow control is off for TX and off for RX.
tg3: eth3: Link is up at 1000 Mbps, full duplex.
tg3: eth3: Flow control is off for TX and off for RX.
bnx2: eth1: using MSI
bnx2: eth1 NIC SerDes Link is Up, 1000 Mbps full duplex
tg3: eth2: Link is up at 1000 Mbps, full duplex.
tg3: eth2: Flow control is off for TX and off for RX.
tg3: eth3: Link is up at 1000 Mbps, full duplex.
tg3: eth3: Flow control is off for TX and off for RX.
bnx2: eth1: using MSI
bnx2: eth1 NIC SerDes Link is Up, 1000 Mbps full duplex
tg3: eth2: Link is up at 1000 Mbps, full duplex.
tg3: eth2: Flow control is off for TX and off for RX.
tg3: eth3: Link is up at 1000 Mbps, full duplex.
tg3: eth3: Flow control is off for TX and off for RX.
bnx2: eth1: using MSI
bnx2: eth1 NIC SerDes Link is Up, 1000 Mbps full duplex
tg3: eth2: Link is up at 1000 Mbps, full duplex.
tg3: eth2: Flow control is off for TX and off for RX.
tg3: eth3: Link is up at 1000 Mbps, full duplex.
tg3: eth3: Flow control is off for TX and off for RX.
bnx2: eth1: using MSI

In 2.6.27-rc1-git4, I now see this (39 times):

BUG: scheduling while atomic: ifconfig/16971/0x00000100
Modules linked in: parport_pc lp parport tg3 lpfc cciss ehci_hcd ohci_hcd uhci_hcd
Pid: 16971, comm: ifconfig Not tainted 2.6.27-rc1-git4 #1

Call Trace:
 [<ffffffff80283db9>] ? page_add_new_anon_rmap+0x20/0x22
 [<ffffffff802310e9>] __schedule_bug+0x62/0x66
 [<ffffffff80551146>] schedule+0x99/0x759
 [<ffffffff8023dc9f>] ? __mod_timer+0xc1/0xd3
 [<ffffffff8055584a>] ? do_page_fault+0x473/0x7dd
 [<ffffffff80551ce4>] schedule_timeout+0x8d/0xb4
 [<ffffffff8023d99e>] ? process_timeout+0x0/0xb
 [<ffffffff80551cdf>] ? schedule_timeout+0x88/0xb4
 [<ffffffff80551d24>] schedule_timeout_uninterruptible+0x19/0x1b
 [<ffffffff8023dcc5>] msleep+0x14/0x1e
 [<ffffffff80375f2f>] pci_set_power_state+0x1cd/0x292
 [<ffffffff803739fc>] ? pci_bus_write_config_dword+0x64/0x73
 [<ffffffffa00651b6>] tg3_set_power_state+0x58/0x884 [tg3]
 [<ffffffff80552525>] ? __mutex_lock_slowpath+0x1d8/0x1e5
 [<ffffffffa006b57a>] tg3_open+0x46/0x6cc [tg3]
 [<ffffffff80552525>] ? __mutex_lock_slowpath+0x1d8/0x1e5
 [<ffffffff804bdcfe>] dev_open+0x73/0xa8
 [<ffffffff804bbf5e>] dev_change_flags+0xab/0x167
 [<ffffffff804f7094>] devinet_ioctl+0x269/0x5da
 [<ffffffff8026d9da>] ? unlock_page+0x2d/0x32
 [<ffffffff804f7ca8>] inet_ioctl+0x92/0xaa
 [<ffffffff804b2046>] sock_ioctl+0x1d1/0x1fb
 [<ffffffff802a50aa>] vfs_ioctl+0x2a/0x77
 [<ffffffff802a534c>] do_vfs_ioctl+0x255/0x272
 [<ffffffff8055584a>] ? do_page_fault+0x473/0x7dd
 [<ffffffff802a53ab>] sys_ioctl+0x42/0x67
 [<ffffffff8020beeb>] system_call_fastpath+0x16/0x1b

---
~Randy
Linux Plumbers Conference, 17-19 September 2008, Portland, Oregon USA
http://linuxplumbersconf.org/
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