Brian Behlendorf
d2acd3696f
Linux 5.9 compat: NR_SLAB_RECLAIMABLE ( #10865 )
...
Commit dcdc12e added compatibility code to treat NR_SLAB_RECLAIMABLE_B
as if it were the same as NR_SLAB_RECLAIMABLE. However, the new value
is in bytes while the old value was in pages which means they are not
interchangeable.
The only place the reclaimable slab size is used is as a component of
the calculation done by arc_free_memory(). This function returns the
amount of memory the ARC considers to be free or reclaimable at little
cost. Rather than switch to a new interface to get this value it has
been removed it from the calculation. It is normally a minor component
compared to the number of inactive or free pages, and removing it
aligns the behavior with the FreeBSD version of arc_free_memory().
Reviewed-by: Matthew Ahrens <mahrens@delphix.com >
Reviewed-by: Coleman Kane <ckane@colemankane.org >
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov >
Backported-by: Brian Behlendorf <behlendorf1@llnl.gov >
Reviewed-by: Tony Hutter <hutter2@llnl.gov >
Closes #10834
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