Module Name: src
Committed By: ad
Date: Mon Apr 13 15:16:14 UTC 2020
Modified Files:
src/sys/uvm: uvm_pglist.h
Log Message:
Comments
To generate a diff of this commit:
cvs rdiff -u -r1.10 -r1.11 src/sys/uvm/uvm_pglist.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/uvm/uvm_pglist.h
diff -u src/sys/uvm/uvm_pglist.h:1.10 src/sys/uvm/uvm_pglist.h:1.11
--- src/sys/uvm/uvm_pglist.h:1.10 Sat Dec 28 08:33:35 2019
+++ src/sys/uvm/uvm_pglist.h Mon Apr 13 15:16:14 2020
@@ -1,4 +1,4 @@
-/* $NetBSD: uvm_pglist.h,v 1.10 2019/12/28 08:33:35 martin Exp $ */
+/* $NetBSD: uvm_pglist.h,v 1.11 2020/04/13 15:16:14 ad Exp $ */
/*-
* Copyright (c) 2000, 2001, 2008, 2019 The NetBSD Foundation, Inc.
@@ -49,7 +49,9 @@ LIST_HEAD(pgflist, vm_page);
* pglist = &uvm.page_free[freelist].pgfl_buckets[bucket].pgb_color[color];
*
* Freelists provide a priority ordering of pages for allocation, based upon
- * how valuable they are for special uses (e.g. device driver DMA).
+ * how valuable they are for special uses (e.g. device driver DMA). MD
+ * code decides the number and structure of these. They are always arranged
+ * in descending order of allocation priority.
*
* Pages are then grouped in buckets according to some common factor, for
* example L2/L3 cache locality. Each bucket has its own lock, and the
@@ -66,15 +68,10 @@ struct pgflbucket {
};
/*
- * At the root, the freelists. MD code decides the number and structure of
- * these. They are always arranged in descending order of allocation
- * priority.
- *
* 8 buckets should be enough to cover most all current x86 systems (2019),
* given the way package/core/smt IDs are structured on x86. For systems
* that report high package counts despite having a single physical CPU
- * package (e.g. Ampere eMAG) a little bit of sharing isn't going to hurt
- * in the least.
+ * package (e.g. Ampere eMAG) a little bit of sharing isn't going to hurt.
*/
#define PGFL_MAX_BUCKETS 8
struct pgfreelist {
