linux-kernel - BUG: scheduling while atomic

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Date:	Fri, 19 Jun 2009 21:15:29 +0300
From:	Sergey Senozhatsky <sergey.senozhatsky@...l.by>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: BUG: scheduling while atomic

Hello.
I see lots of "BUG: scheduling while atomic" with current kernels (started with 2.6.30-git1, 2.6.30 is ok).
For example (2.6.30-git14):

kernel: [27404.945372] BUG: scheduling while atomic: pptpgw/4637/0x00000400
kernel: [27404.945378] INFO: lockdep is turned off.
kernel: [27404.945383] Modules linked in: ppp_deflate zlib_deflate ppp_async crc_ccitt ppp_generic slhc ipv6 fuse sbp2 loop snd_hda_codec_si3054 snd_hda_codec_realtek
snd_hda_intel snd_hda_codec snd_pcm snd_seq_mi
di snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device pcspkr snd i2c_i801 psmouse serio_raw rng_core soundcore snd_page_alloc asus_laptop evdev usbhid hid sg sr_mod
cdrom sd_mod sdhci_pci sdhci mmc_co
re ohci1394 ata_generic pata_acpi ricoh_mmc uhci_hcd led_class ata_piix ieee1394 ide_pci_generic ehci_hcd usbcore r8169 mii
kernel: [27404.945532] 
kernel: [27404.945540] Pid: 4637, comm: pptpgw Not tainted (2.6.30-dbgnv-git14 #4) F3JC                
kernel: [27404.945549] EIP: 0060:[<c104a3d5>] EFLAGS: 00200246 CPU: 0
kernel: [27404.945559] EIP is at __tasklet_schedule+0x65/0xb0
kernel: [27404.945566] EAX: 00000000 EBX: f6077c6c ECX: 00000000 EDX: 00000000
kernel: [27404.945573] ESI: 00200246 EDI: 00000001 EBP: e2807e60 ESP: e2807e54
kernel: [27404.945581]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
kernel: [27404.945589] CR0: 8005003b CR2: b5f027ac CR3: 35993000 CR4: 000006d0
kernel: [27404.945596] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
kernel: [27404.945603] DR6: ffff0ff0 DR7: 00000400
kernel: [27404.945609] Call Trace:
kernel: [27404.945621]  [<f90be38b>] ppp_asynctty_wakeup+0x6b/0x80 [ppp_async]
kernel: [27404.945632]  [<c12de902>] tty_wakeup+0x72/0x90
kernel: [27404.945643]  [<c12e70d3>] pty_unthrottle+0x23/0x50
kernel: [27404.945653]  [<c12e3b22>] tty_unthrottle+0x42/0x70
kernel: [27404.945663]  [<c12e1c2f>] n_tty_read+0x48f/0x730
kernel: [27404.945676]  [<c103e150>] ? default_wake_function+0x0/0x40
kernel: [27404.945688]  [<c12dcc20>] tty_read+0xa0/0xe0
kernel: [27404.945698]  [<c12e17a0>] ? n_tty_read+0x0/0x730
kernel: [27404.945709]  [<c10faf2b>] vfs_read+0xbb/0x1c0
kernel: [27404.945720]  [<c12dcb80>] ? tty_read+0x0/0xe0
kernel: [27404.945730]  [<c10fb138>] sys_read+0x58/0xa0
kernel: [27404.945741]  [<c100325b>] sysenter_do_call+0x12/0x32

/USR/SBIN/CRON[10140]: CMD (fetchmail -sk -m '/usr/bin/procmail' > /dev/null 2>&1)

kernel: [27729.047046] BUG: spinlock lockup on CPU#1, pppd/4636, f5928dc0
kernel: [27729.047060] Pid: 4636, comm: pppd Not tainted 2.6.30-dbgnv-git14 #4
kernel: [27729.047067] Call Trace:
kernel: [27729.047084]  [<c141786b>] ? printk+0x23/0x36
kernel: [27729.047099]  [<c125da29>] _raw_spin_lock+0x159/0x170
kernel: [27729.047111]  [<c141b7f2>] _spin_lock_bh+0x62/0x90
kernel: [27729.047130]  [<f90aabe7>] ? ppp_channel_push+0x27/0xd0 [ppp_generic]
kernel: [27729.047145]  [<f90aabe7>] ppp_channel_push+0x27/0xd0 [ppp_generic]
kernel: [27729.047159]  [<f90aad67>] ppp_write+0xd7/0xe0 [ppp_generic]
kernel: [27729.047172]  [<c10fac1e>] vfs_write+0xbe/0x1c0
kernel: [27729.047186]  [<f90aac90>] ? ppp_write+0x0/0xe0 [ppp_generic]
kernel: [27729.047197]  [<c10fae28>] sys_write+0x58/0xa0
kernel: [27729.047209]  [<c100325b>] sysenter_do_call+0x12/0x32
kernel: [27787.880283] SysRq : Keyboard mode set to system default

//Truncated. See attachment for details.

Hardware: ASUS F3Jc

Reported: http://bugzilla.kernel.org/show_bug.cgi?id=13522


Thanks,
	Sergey

View attachment "syslog_bug_3" of type "text/plain" (148768 bytes)