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Implement memory and CPU hotplug

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ZFS currently doesn't react to hotplugging cpu or memory into the 
system in any way. This patch changes that by adding logic to the ARC 
that allows the system to take advantage of new memory that is added 
for caching purposes. It also adds logic to the taskq infrastructure 
to support dynamically expanding the number of threads allocated to a 
taskq.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Co-authored-by: Matthew Ahrens <matthew.ahrens@delphix.com>
Co-authored-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Paul Dagnelie <pcd@delphix.com>
Closes #11212
This commit is contained in:
Paul Dagnelie
2020-12-10 14:09:23 -08:00
committed by GitHub
parent f483daa870
commit 60a4c7d2a2
14 changed files with 290 additions and 36 deletions
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include/sys/arc.h
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@@ -310,6 +310,7 @@ int arc_tempreserve_space(spa_t *spa, uint64_t reserve, uint64_t txg);
uint64_t arc_all_memory(void);
uint64_t arc_default_max(uint64_t min, uint64_t allmem);
uint64_t arc_target_bytes(void);
void arc_set_limits(uint64_t);
void arc_init(void);
void arc_fini(void);