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Make zio_taskq_batch_pct user configurable

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Adds zio_taskq_batch_pct as an exported module parameter,
allowing users to modify it at module load time.

Signed-off-by: DHE <git@dehacked.net>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #4110
This commit is contained in:
DHE
2015-12-16 14:22:32 -05:00
committed by Brian Behlendorf
parent 82dba185c8
commit dcb6bed1df
2 changed files with 23 additions and 1 deletions
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module/zfs/spa.c
+6 -1
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@@ -867,7 +867,7 @@ spa_taskqs_init(spa_t *spa, zio_type_t t, zio_taskq_type_t q)
case ZTI_MODE_BATCH:
batch = B_TRUE;
flags |= TASKQ_THREADS_CPU_PCT;
value = zio_taskq_batch_pct;
value = MIN(zio_taskq_batch_pct, 100);
break;
default:
@@ -6804,4 +6804,9 @@ MODULE_PARM_DESC(spa_load_verify_metadata,
module_param(spa_load_verify_data, int, 0644);
MODULE_PARM_DESC(spa_load_verify_data,
"Set to traverse data on pool import");
module_param(zio_taskq_batch_pct, uint, 0444);
MODULE_PARM_DESC(zio_taskq_batch_pct,
"Percentage of CPUs to run an IO worker thread");
#endif