[openib-general] oops with user level verbs

[Michael S. Tsirkin]

Hi, Roland!
On one of my machines, I am often getting this oops when running
the pingpong example.

Feb 27 15:18:40 swlab156 kernel: Unable to handle kernel paging request at 000030616368746d RIP: 
Feb 27 15:18:40 swlab156 kernel: [<000030616368746d>]
Feb 27 15:18:40 swlab156 kernel: PML4 0 
Feb 27 15:18:40 swlab156 kernel: Oops: 0000 [1] SMP 
Feb 27 15:18:40 swlab156 kernel: CPU 1 
Feb 27 15:18:40 swlab156 kernel: Modules linked in: ib_uverbs ib_umad autofs usbserial parport_pc lp parport joydev st sr_mod floppy thermal processor fan button battery ipv6 ac ib_mthca ib_mad ib_core e1000 i2c_i801 i2c_core hw_random ehci_hcd uhci_hcd usbcore evdev dm_mod ext3 jbd aic79xx ata_piix libata sd_mod scsi_mod
Feb 27 15:18:40 swlab156 kernel: Pid: 12588, comm: ibv_pingpong Not tainted 2.6.10-openib
Feb 27 15:18:40 swlab156 kernel: RIP: 0010:[<000030616368746d>] [<000030616368746d>]
Feb 27 15:18:40 swlab156 kernel: RSP: 0018:0000010170adde90  EFLAGS: 00010212
Feb 27 15:18:40 swlab156 kernel: RAX: 000001017479b800 RBX: 0000010175c04618 RCX: 0000000000000000
Feb 27 15:18:40 swlab156 kernel: RDX: 00000101736d8880 RSI: 0000010175c04618 RDI: 0000010170985480
Feb 27 15:18:40 swlab156 kernel: RBP: 000001017f705cc0 R08: 0000010170addf08 R09: 0000000000000000
Feb 27 15:18:40 swlab156 kernel: R10: 0000010175c04618 R11: 00000000000000b0 R12: 0000000000001000
Feb 27 15:18:40 swlab156 kernel: R13: 0000002a95dba000 R14: 00000000ffffffea R15: 00000100bffaf6c0
Feb 27 15:18:41 swlab156 kernel: FS:  0000002a95cb50a0(0000) GS:ffffffff8045bc00(0000) knlGS:0000000000000000
Feb 27 15:18:41 swlab156 kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Feb 27 15:18:41 swlab156 kernel: CR2: 000030616368746d CR3: 000000000b14a000 CR4: 00000000000006e0
Feb 27 15:18:41 swlab156 kernel: Process ibv_pingpong (pid: 12588, threadinfo 0000010170adc000, task 0000010174a94a40)
Feb 27 15:18:41 swlab156 kernel: Stack: ffffffffa01db022 0000000000000212 ffffffff80164cb5 0000000000000000 
Feb 27 15:18:41 swlab156 kernel:        0000000000000018 0000007fbfffee20 00000101736d8880 0000000000000000 
Feb 27 15:18:41 swlab156 kernel:        00000001bfffee20 001000fa00000000 
Feb 27 15:18:41 swlab156 kernel: Call Trace:<ffffffffa01db022>{:ib_uverbs:ib_uverbs_mmap+32} <ffffffff80164cb5>{do_mmap_pgoff+1330} 
Feb 27 15:18:41 swlab156 kernel:        <ffffffff80114584>{sys_mmap+142} <ffffffff8010e226>{system_call+126} 
Feb 27 15:18:41 swlab156 kernel:        
Feb 27 15:18:41 swlab156 kernel: 
Feb 27 15:18:41 swlab156 kernel: Code:  Bad RIP value.
Feb 27 15:18:41 swlab156 kernel: RIP [<000030616368746d>] RSP <0000010170adde90>
Feb 27 15:18:41 swlab156 kernel: CR2: 000030616368746d
Feb 27 15:18:57 swlab156 sshd[12591]: Accepted keyboard-interactive/pam for root from ::ffff:10.4.4.15 port 2846 ssh2

-- 
MST - Michael S. Tsirkin