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Alexander Motin
aaf374bd40
Free issue threads might block waiting for synchronous DDT, BRT or GANG header reads. So unlike other taskqs using ZTI_SCALE to scale with number of CPUs, here we also need some amount of threads to potentially saturate pool reads. I am not sure we always want the 96 threads we had before ZTI_SCALE introduction at #11966 on small systems, but lets make it at least 32. While here, make free taskqs configurable, similar to read and write ones. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Rob Norris <robn@despairlabs.com> Signed-off-by: Alexander Motin <alexander.motin@TrueNAS.com> Closes #17903