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| author | Nicholas Bellinger | 2017-01-20 00:45:57 +0100 |
|---|---|---|
| committer | Nicholas Bellinger | 2017-02-27 01:21:06 +0100 |
| commit | c87ba9c49c1fa86261448b09c5f1b2223bf7efd9 (patch) | |
| tree | d710dc3220024b8215cb2531fc55a122ebaba07c /drivers/target/target_core_tmr.c | |
| parent | iscsi-target: Fix early login failure statistics misses (diff) | |
| download | kernel-qcow2-linux-c87ba9c49c1fa86261448b09c5f1b2223bf7efd9.tar.gz kernel-qcow2-linux-c87ba9c49c1fa86261448b09c5f1b2223bf7efd9.tar.xz kernel-qcow2-linux-c87ba9c49c1fa86261448b09c5f1b2223bf7efd9.zip | |
target: Add counters for ABORT_TASK success + failure
This patch introduces two counters for ABORT_TASK success +
failure under:
/sys/kernel/config/target/core/$HBA/$DEV/statistics/scsi_tgt_dev/
that are useful for diagnosing various backend device latency
and front fabric issues.
Normally when folks see alot of aborts_complete happening,
it means the backend device I/O completion latency is high,
and not returning completions fast enough before host side
timeouts trigger.
And normally when folks see alot of aborts_no_task, it means
completions are being posted by target-core into fabric driver
code, but the responses aren't making it back to the host.
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/target_core_tmr.c')
| -rw-r--r-- | drivers/target/target_core_tmr.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/target/target_core_tmr.c b/drivers/target/target_core_tmr.c index a806d9bca3d2..dce1e1b47316 100644 --- a/drivers/target/target_core_tmr.c +++ b/drivers/target/target_core_tmr.c @@ -190,6 +190,7 @@ void core_tmr_abort_task( printk("ABORT_TASK: Sending TMR_FUNCTION_COMPLETE for" " ref_tag: %llu\n", ref_tag); tmr->response = TMR_FUNCTION_COMPLETE; + atomic_long_inc(&dev->aborts_complete); return; } spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); @@ -197,6 +198,7 @@ void core_tmr_abort_task( printk("ABORT_TASK: Sending TMR_TASK_DOES_NOT_EXIST for ref_tag: %lld\n", tmr->ref_task_tag); tmr->response = TMR_TASK_DOES_NOT_EXIST; + atomic_long_inc(&dev->aborts_no_task); } static void core_tmr_drain_tmr_list( |