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5376 arc_kmem_reap_now() should not result in clearing arc_no_grow Reviewed by: Christopher Siden <christopher.siden@delphix.com> Reviewed by: George Wilson <george.wilson@delphix.com> Reviewed by: Steven Hartland <killing@multiplay.co.uk> Reviewed by: Richard Elling <richard.elling@richardelling.com> Approved by: Dan McDonald <danmcd@omniti.com> References: https://www.illumos.org/issues/5376 https://github.com/illumos/illumos-gate/commit/2ec99e3 Porting Notes: The good news is that many of the recent changes made upstream to the ARC tackled issues previously observed by ZoL with similar solutions. The bad news is those solution weren't identical to the ones we applied. This patch is designed to split the difference and apply as much of the upstream work as possible. * The arc_available_memory() function was removed previous in ZoL but due to the upstream changes it makes sense to add it back. This function has been customized for Linux so that it can be used to determine a low memory. This provides the same basic functionality as the illumos version allowing us to minimize changes through the rest of the code base. The exact mechanism used to detect a low memory state remains unchanged so this change isn't a significant as it might first appear. * This patch includes the long standing fix for arc_shrink() which was originally proposed in #2167. Since there were related changes to this function it made sense to include that work. * The arc_init() function has been re-factored. As before it sets sane default values for the ARC but then calls arc_tuning_update() to apply user specific tuning made via module options. The arc_tuning_update() function is then called periodically by the arc_reclaim_thread() to apply changes to the tunings made during normal operation. Ported-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #3616 Closes #2167 |
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Native ZFS for Linux!
ZFS is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the Illumos community.
ZFS on Linux, which is also known as ZoL, is currently feature complete. It includes fully functional and stable SPA, DMU, ZVOL, and ZPL layers.
Full documentation for installing ZoL on your favorite Linux distribution can be found at: http://zfsonlinux.org