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arm64, riscv: Set VM_KMEM_SIZE_SCALE to 1

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This setting limits the amount of memory that can be allocated to UMA.
On systems with a direct map and ample KVA, however, there is no reason
for VM_KMEM_SIZE_SCALE to be larger than 1.  This appears to have been
inherited from the 32-bit ARM platform definitions.

Also remove VM_KMEM_SIZE_MIN, which is not needed when
VM_KMEM_SIZE_SCALE is defined to be 1.[*]

Reviewed by:	alc, kp, kib
Reported by:	alc [*]
Submitted by:	Klara, Inc.
Sponsored by:	Ampere Computing
Differential Revision:	https://reviews.freebsd.org/D28225
This commit is contained in:
Mark Johnston 2021-01-19 20:34:36 -05:00
parent 089eafaff3
commit 3e3eb5f45f
2 changed files with 2 additions and 16 deletions
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9
sys/arm64/include/vmparam.h
View file

@ -201,14 +201,7 @@
* How many physical pages per kmem arena virtual page.
*/
#ifndef VM_KMEM_SIZE_SCALE
#define VM_KMEM_SIZE_SCALE (3)
#endif
/*
* Optional floor (in bytes) on the size of the kmem arena.
*/
#ifndef VM_KMEM_SIZE_MIN
#define VM_KMEM_SIZE_MIN (16 * 1024 * 1024)
#define VM_KMEM_SIZE_SCALE (1)
#endif
/*

9
sys/riscv/include/vmparam.h
View file

@ -196,14 +196,7 @@
* How many physical pages per kmem arena virtual page.
*/
#ifndef VM_KMEM_SIZE_SCALE
#define VM_KMEM_SIZE_SCALE (3)
#endif
/*
* Optional floor (in bytes) on the size of the kmem arena.
*/
#ifndef VM_KMEM_SIZE_MIN
#define VM_KMEM_SIZE_MIN (16 * 1024 * 1024)
#define VM_KMEM_SIZE_SCALE (1)
#endif
/*