From 67d13998b3e055232a07311c2dc609571eaf1df1 Mon Sep 17 00:00:00 2001 From: Alexander Motin Date: Wed, 24 Apr 2024 17:38:48 -0400 Subject: Make more taskq parameters writable There is no reason for these module parameters to be read-only. Being modified they just apply on next pool import/creation, that is useful for testing different values. Reviewed-by: Rich Ercolani Reviewed-by: Brian Behlendorf Signed-off-by: Alexander Motin Sponsored by: iXsystems, Inc. Closes #16118 --- man/man4/zfs.4 | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'man/man4') diff --git a/man/man4/zfs.4 b/man/man4/zfs.4 index 6088ebc7e..22e1106bb 100644 --- a/man/man4/zfs.4 +++ b/man/man4/zfs.4 @@ -2327,8 +2327,8 @@ Prioritize requeued I/O. . .It Sy zio_taskq_batch_pct Ns = Ns Sy 80 Ns % Pq uint Percentage of online CPUs which will run a worker thread for I/O. -These workers are responsible for I/O work such as compression and -checksum calculations. +These workers are responsible for I/O work such as compression, encryption, +checksum and parity calculations. Fractional number of CPUs will be rounded down. .Pp The default value of @@ -2336,6 +2336,7 @@ The default value of was chosen to avoid using all CPUs which can result in latency issues and inconsistent application performance, especially when slower compression and/or checksumming is enabled. +Set value only applies to pools imported/created after that. . .It Sy zio_taskq_batch_tpq Ns = Ns Sy 0 Pq uint Number of worker threads per taskq. @@ -2345,6 +2346,7 @@ while higher reduces lock contention. If .Sy 0 , generate a system-dependent value close to 6 threads per taskq. +Set value only applies to pools imported/created after that. . .It Sy zio_taskq_wr_iss_ncpus Ns = Ns Sy 0 Pq uint Determines the number of CPUs to run write issue taskqs. @@ -2353,16 +2355,19 @@ When 0 (the default), the value to use is computed internally as the number of actual CPUs in the system divided by the .Sy spa_num_allocators value. +Set value only applies to pools imported/created after that. . .It Sy zio_taskq_read Ns = Ns Sy fixed,1,8 null scale null Pq charp Set the queue and thread configuration for the IO read queues. This is an advanced debugging parameter. Don't change this unless you understand what it does. +Set values only apply to pools imported/created after that. . .It Sy zio_taskq_write Ns = Ns Sy sync fixed,1,5 scale fixed,1,5 Pq charp Set the queue and thread configuration for the IO write queues. This is an advanced debugging parameter. Don't change this unless you understand what it does. +Set values only apply to pools imported/created after that. . .It Sy zvol_inhibit_dev Ns = Ns Sy 0 Ns | Ns 1 Pq uint Do not create zvol device nodes. -- cgit v1.2.3