Dear All,
I am trying to test my error handler functionality by invoking my
timeout function. To do so, I am blocking response to host from the
device for a specific data-in request. I am expected to see the
“scsi_times_out” function call in the trace. However, after 120
seconds I have seen the following messages in the /var/log/messages
file instead of getting invoked “scsi_times_out” function.
Please find the procedure how I am registering the timeout function in
LLDD transport template.
my_domain_attach_transport(struct domain_function_template *dft)
{
struct scsi_transport_template *stt = my_attach_transport();
struct internal *i;
if (!stt)
return stt;
i = to_internal(stt);
i->dft = dft;
stt->create_work_queue = 1;
stt->eh_timed_out = my_scsi_timed_out;
return stt;
}
Trace from /var/log/messages.
INFO: task mount:3487 blocked for more than 120 seconds.
Oct 26 15:19:57 My kernel: "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Oct 26 15:19:57 My kernel: mount D d18a5f90 0 3487 3486
Oct 26 15:19:57 My kernel: de6d2200 00200086 00036cdc d18a5f90
0000002c cedf8000 cedf827c c13f9860
Oct 26 15:19:57 My kernel: 00000000 c04febaf fffe5c10 c04f2367
de6f0010 de1065a8 c043d46e 0001e1fa
Oct 26 15:19:57 My kernel: de1065a8 0001e1INFO: task mount:3487
blocked for more than 120 seconds.
Oct 26 15:19:57 My kernel: "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Oct 26 15:19:57 My kernel: mount D d18a5f90 0 3487 3486
Oct 26 15:19:57 My kernel: de6d2200 00200086 00036cdc d18a5f90
0000002c cedf8000 cedf827c c13f9860
Oct 26 15:19:57 My kernel: 00000000 c04febaf fffe5c10 c04f2367
de6f0010 de1065a8 c043d46e 0001e1fa
Oct 26 15:19:57 My kernel: de1065a8 0001e1fa c13f9860 00000001
de093bb0 00040001 c062b9b9 c062bbd5
Oct 26 15:19:57 My kernel: Call Trace:
Oct 26 15:19:57 My kernel: [<c04febaf>] ? cfq_may_queue+0x45/0xad
Oct 26 15:19:57 My kernel: [<c04f2367>] ? elv_may_queue+0x15/0x17
Oct 26 15:19:57 My kernel: [<c043d46e>] ? getnstimeofday+0x52/0xd6
Oct 26 15:19:57 My kernel: [<c062b9b9>] ? schedule+0x5/0x13
Oct 26 15:19:57 My kernel: [<c062bbd5>] ? io_schedule+0x44/0x75
Oct 26 15:19:57 My kernel: [<c04f4f5e>] ? get_request_wait+0xba/0x118
Oct 26 15:19:57 My kernel: [<c04376a4>] ? autoremove_wake_function+0x0/0x2d
Oct 26 15:19:57 My kernel: [<c04f549f>] ? __make_request+0x2c6/0x37f
Oct 26 15:19:57 My kernel: [<c04f4186>] ? generic_make_request+0x2c5/0x34a
Oct 26 15:19:57 My kernel: [<c0466db5>] ? mempool_alloc+0x37/0xd5
Oct 26 15:19:57 My kernel: [<c04f51d2>] ? submit_bio+0xaf/0xb6
Oct 26 15:19:57 My kernel: [<c04a4f30>] ? bio_alloc_bioset+0x35/0x96
Oct 26 15:19:57 My kernel: [<c04a160d>] ? submit_bh+0xd0/0xee
Oct 26 15:19:57 My kernel: [<c04a3004>] ? __block_write_full_page+0x231/0x323
Oct 26 15:19:57 My kernel: [<c04a7213>] ? blkdev_get_block+0x0/0x45
Oct 26 15:19:57 My kernel: [<c04a31e2>] ? block_write_full_page_endio+0xec/0xf6
Oct 26 15:19:57 My kernel: [<c04a3deb>] ? end_buffer_async_write+0x0/0xd3
Oct 26 15:19:57 My kernel: [<c04a7213>] ? blkdev_get_block+0x0/0x45
Oct 26 15:19:57 My kernel: [<c04a31f6>] ? block_write_full_page+0xa/0xc
Oct 26 15:19:57 My kernel: [<c04a3deb>] ? end_buffer_async_write+0x0/0xd3
Oct 26 15:19:57 My kernel: [<c0469d03>] ? __writepage+0x8/0x1f
Oct 26 15:19:57 My kernel: [<c0469fdf>] ? write_cache_pages+0x1e5/0x2e1
Oct 26 15:19:57 My kernel: [<c0469cfb>] ? __writepage+0x0/0x1f
Oct 26 15:19:57 My kernel: [<c046a0db>] ? generic_writepages+0x0/0x21
Oct 26 15:19:57 My kernel: [<c046a0f5>] ? generic_writepages+0x1a/0x21
Oct 26 15:19:57 My kernel: [<c046a11c>] ? do_writepages+0x20/0x30
INFO: task mount:3487 blocked for more than 120 seconds.
Oct 26 15:19:57 My kernel: "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Oct 26 15:19:57 My kernel: mount D d18a5f90 0 3487 3486
Could any one please let me know is there any problem in invoke the
scsi_times_out function?
Regards,
Aditya.
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