diff options
| author | Jan Glauber <jang@linux.vnet.ibm.com> | 2008-12-25 13:38:47 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-12-25 13:38:59 +0100 |
| commit | 50f769df1c4bea766c4eb927eae35728fb93e305 (patch) | |
| tree | c86228e6965de0ea84bddc2104d7dfa339e2a187 /drivers/s390/cio/qdio_perf.h | |
| parent | 22f9934767f49012ffbae753b28b8055bd28348f (diff) | |
[S390] qdio: improve inbound buffer acknowledgement
- Use automatic acknowledgement of incoming buffers in QEBSM mode
- Move ACK for non-QEBSM mode always to the newest buffer to prevent
a race with qdio_stop_polling
- Remove the polling spinlock, the upper layer drivers return new buffers
in the same code path and could not run in parallel
- Don't flood the error log in case of no-target-buffer-empty
- In handle_inbound we check if we would overwrite an ACK'ed buffer, if so
advance the pointer to the oldest ACK'ed buffer so we don't overwrite an
empty buffer in qdio_stop_polling
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/qdio_perf.h')
| -rw-r--r-- | drivers/s390/cio/qdio_perf.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/s390/cio/qdio_perf.h b/drivers/s390/cio/qdio_perf.h index d16c1c67160..7821ac4fa51 100644 --- a/drivers/s390/cio/qdio_perf.h +++ b/drivers/s390/cio/qdio_perf.h @@ -36,6 +36,7 @@ struct qdio_perf_stats { atomic_long_t inbound_handler; atomic_long_t outbound_handler; atomic_long_t fast_requeue; + atomic_long_t outbound_target_full; /* for debugging */ atomic_long_t debug_tl_out_timer; |