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Rob Norris
7ea899be04
zfs_file_fsync() and zfs_file_deallocate() are both blocking ops, so the zio_taskq thread is active and blocked both while waiting for the IO call and then while calling zio_execute() for the next stage. This is a particular issue for FLUSH, as the z_flush_iss queue typically only has one thread; multiple flushes arriving at once can cause long delays if the underlying fsync() response is particularly slow. To fix this, we dispatch both FLUSH and TRIM to the z_vdev_file taskq, just as we do for reads and writes. Further, we return all results through zio_interrupt(), so neither the issue nor the file taskqs are blocked. Sponsored-by: Klara, Inc. Sponsored-by: Wasabi Technology, Inc. Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Alexander Motin <mav@FreeBSD.org> Signed-off-by: Rob Norris <rob.norris@klarasystems.com> Closes #17064