[Pvfs2-users] OpenIB/kernel interface: null pointerdereference in put_back_slot

[Tad Kollar]

Pete Wyckoff wrote:
> Have you been able to use, say, pvfs2-cp to put files into PVFS over
> IB?  That will help us know if it's a kernel problem or an IB
> problem, perhaps.
>   
After getting your reply I set up a test that used pvfs2-cp to copy a
2.5G file back and forth a total of 30 times. During that process,
pvfs2-cp generated these three errors, always during the read back from
the pvfs2 fs:

[E 15:44:43.719270] Error: ib_check_cq: entry id 0x5c4e70 opcode RECV
error IBV_WC_WR_FLUSH_ERR.
[E 15:44:43.924115]     [bt] pvfs2-cp(error+0xca) [0x44a1ca]
[E 15:44:43.924161]     [bt] pvfs2-cp [0x448dc3]
[E 15:44:43.924171]     [bt] pvfs2-cp [0x4492c6]
[E 15:44:43.924179]     [bt] pvfs2-cp(BMI_testcontext+0x151) [0x433371]
[E 15:44:43.924187]     [bt] pvfs2-cp(PINT_thread_mgr_bmi_push+0x144)
[0x43c054]
[E 15:44:43.924195]     [bt] pvfs2-cp(job_testcontext+0x15a) [0x43b87a]
[E 15:44:43.924204]     [bt]
pvfs2-cp(PINT_client_state_machine_test+0x98) [0x40ff88]
[E 15:44:43.924211]     [bt] pvfs2-cp(PVFS_sys_wait+0x63) [0x4103b3]
[E 15:44:43.924220]     [bt] pvfs2-cp(PVFS_sys_io+0x6b) [0x41635b]
[E 15:44:43.924228]     [bt] pvfs2-cp(main+0x372) [0x40d792]
[E 15:44:43.924236]     [bt] /lib/libc.so.6(__libc_start_main+0xda)
[0x2aaaab0784ca]

[E 09:06:20.511281] Error: ib_check_cq: entry id 0x5e83f0 opcode RECV
error IBV_WC_WR_FLUSH_ERR.
[E 09:06:21.104063]     [bt] pvfs2-cp(error+0xca) [0x44a1ca]
[E 09:06:21.104112]     [bt] pvfs2-cp [0x448dc3]
[E 09:06:21.104120]     [bt] pvfs2-cp [0x4492c6]
[E 09:06:21.104128]     [bt] pvfs2-cp(BMI_testcontext+0x151) [0x433371]
[E 09:06:21.104136]     [bt] pvfs2-cp(PINT_thread_mgr_bmi_push+0x144)
[0x43c054]
[E 09:06:21.104143]     [bt] pvfs2-cp(job_testcontext+0x15a) [0x43b87a]
[E 09:06:21.104151]     [bt]
pvfs2-cp(PINT_client_state_machine_test+0x98) [0x40ff88]
[E 09:06:21.104158]     [bt] pvfs2-cp(PVFS_sys_wait+0x63) [0x4103b3]
[E 09:06:21.104165]     [bt] pvfs2-cp(PVFS_sys_io+0x6b) [0x41635b]
[E 09:06:21.104173]     [bt] pvfs2-cp(main+0x372) [0x40d792]
[E 09:06:21.104181]     [bt] /lib/libc.so.6(__libc_start_main+0xda)
[0x2aaaab0784ca]

[E 09:09:46.596001] Error: ib_check_cq: entry id 0x5c4cc0 opcode RECV
error IBV_WC_WR_FLUSH_ERR.
[E 09:09:47.109736]     [bt] pvfs2-cp(error+0xca) [0x44a1ca]
[E 09:09:47.109790]     [bt] pvfs2-cp [0x448dc3]
[E 09:09:47.109799]     [bt] pvfs2-cp [0x4492c6]
[E 09:09:47.109807]     [bt] pvfs2-cp(BMI_testcontext+0x151) [0x433371]
[E 09:09:47.109816]     [bt] pvfs2-cp(PINT_thread_mgr_bmi_push+0x144)
[0x43c054]
[E 09:09:47.109823]     [bt] pvfs2-cp(job_testcontext+0x15a) [0x43b87a]
[E 09:09:47.109831]     [bt]
pvfs2-cp(PINT_client_state_machine_test+0x98) [0x40ff88]
[E 09:09:47.109840]     [bt] pvfs2-cp(PVFS_sys_wait+0x63) [0x4103b3]
[E 09:09:47.109847]     [bt] pvfs2-cp(PVFS_sys_io+0x6b) [0x41635b]
[E 09:09:47.109856]     [bt] pvfs2-cp(main+0x372) [0x40d792]
[E 09:09:47.109863]     [bt] /lib/libc.so.6(__libc_start_main+0xda)
[0x2aaaab0784ca]
> The other interesting thing to know is if you can recofigure PVFS to
> use only TCP, then run your bonnie test and get the same error.
>   
Except for IB testing, I've had TCP specified in the pvfs2tab and mount
options and haven't been able to disrupt it; is that sufficient or
should I remove all references to IB? I repeated the pvfs2-cp using TCP
and didn't receive any errors.

Tad