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f245541e24
FreeBSD 14 gained a `VOP_DEALLOCATE` VFS operation and a `fspacectl` syscall to use it. At minimum, these zero the given region, and if the underlying filesystem supports it, can make the region sparse. We can use this to get TRIM-like behaviour for file vdevs. Sponsored-by: https://despairlabs.com/sponsor/ Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Alexander Motin <mav@FreeBSD.org> Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de> Signed-off-by: Rob Norris <robn@despairlabs.com> Closes #16496 |
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