[Users] Another 2.6.24 problem

Dietmar Maurer dietmar at proxmox.com
Fri Jul 11 07:33:19 EDT 2008

Hi all,

With latest 2.6.24 from git we get errors inside 'futex_wake'
Not always in same program. It only happens from time to time.

Any idea what can cause that? v2.6.24-ovz004 works without problems.

- Dietmar

Unable to handle kernel paging request at ffffffff8fcc289b RIP:
 [<ffffffff8025cbf2>] futex_wake+0x58/0xd4
PGD 203067 PUD 207063 PMD 0
Oops: 0000 [1] PREEMPT SMP
CPU: 2
Modules linked in: e1000 thermal e1000e button processor evdev floppy sg
pcspkr sermouse psmouse dm_mod usbhid hid usb_storage sd_mod
sr_mod ide_disk ide_generic ide_cd cdrom ide_core shpchp pci_hotplug
uhci_hcd ehci_hcd iTCO_wdt ahci libata scsi_mod i2c_i801 i2c_core isofs
zlib_inflate msdos fat
Pid: 4927, comm: pycentral Not tainted 2.6.24 #1 ovz005
RIP: 0010:[<ffffffff8025cbf2>]  [<ffffffff8025cbf2>]
RSP: 0018:ffff810205287dd8  EFLAGS: 00010282
RAX: 000000000001fec2 RBX: 00002ad4fac5d0e4 RCX: 000000000000a1dc
RDX: 00000000a3a5f0f6 RSI: 0000000097c3d800 RDI: ffffffff8fcc2883
RBP: 0000000000000000 R08: 00002ad4fab5a2b4 R09: 0000000000000000
R10: 00002ad4fac5d0e0 R11: 0000000000000202 R12: ffffffff80637f80
R13: ffff81011451c520 R14: ffffffff80637f88 R15: 000000007fffffff
FS:  00002ad4fb121f60(0000) GS:ffff810215d19b40(0000)
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffffffff8fcc289b CR3: 0000000175d6e000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process pycentral (pid: 4927, veid=0, threadinfo ffff810205286000, task
Stack:  00002ad4fac5d000 ffff81011451c4c0 00000000000000e6
 ffff810205287ea8 00002ad4fab5a2b4 00002ad4fac5d0e0 00002ad4fab5c000
 0000000000000001 00000000fab5c320 000000007fffffff ffffffff8025d8c4
Call Trace:
 [<ffffffff802b0e9a>] may_open+0xc2/0x21f
 [<ffffffff8025d8c4>] do_futex+0x84/0xa66
 [<ffffffff8025e3a0>] sys_futex+0xfa/0x118
 [<ffffffff8020c03e>] system_call+0x7e/0x83

Code: 48 8b 5f 18 eb 43 48 8b 14 24 48 39 57 48 48 8d 47 48 75 2e
RIP  [<ffffffff8025cbf2>] futex_wake+0x58/0xd4
 RSP <ffff810205287dd8>
CR2: ffffffff8fcc289b
---[ end trace 542031ea75a6aeb3 ]---
note: pycentral[4927] exited with preempt_count 1

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