mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-11-23 17:51:05 +01:00
10db91ecec
429c871ddd left parens unbalanced in a
powerpc case that my testing missed. Restore balance.
Reported by: jenkins
127 lines
4.2 KiB
C
127 lines
4.2 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2013 EMC Corp.
|
|
* Copyright (c) 2011 Jeffrey Roberson <jeff@freebsd.org>
|
|
* Copyright (c) 2008 Mayur Shardul <mayur.shardul@gmail.com>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Path-compressed radix trie implementation.
|
|
* The following code is not generalized into a general purpose library
|
|
* because there are way too many parameters embedded that should really
|
|
* be decided by the library consumers. At the same time, consumers
|
|
* of this code must achieve highest possible performance.
|
|
*
|
|
* The implementation takes into account the following rationale:
|
|
* - Size of the nodes should be as small as possible but still big enough
|
|
* to avoid a large maximum depth for the trie. This is a balance
|
|
* between the necessity to not wire too much physical memory for the nodes
|
|
* and the necessity to avoid too much cache pollution during the trie
|
|
* operations.
|
|
* - There is not a huge bias toward the number of lookup operations over
|
|
* the number of insert and remove operations. This basically implies
|
|
* that optimizations supposedly helping one operation but hurting the
|
|
* other might be carefully evaluated.
|
|
* - On average not many nodes are expected to be fully populated, hence
|
|
* level compression may just complicate things.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#include "opt_ddb.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/libkern.h>
|
|
#include <sys/pctrie.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/vmmeter.h>
|
|
#include <sys/smr.h>
|
|
#include <sys/smr_types.h>
|
|
|
|
#include <vm/uma.h>
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_radix.h>
|
|
|
|
static uma_zone_t vm_radix_node_zone;
|
|
smr_t vm_radix_smr;
|
|
|
|
void *
|
|
vm_radix_node_alloc(struct pctrie *ptree)
|
|
{
|
|
return (uma_zalloc_smr(vm_radix_node_zone, M_NOWAIT));
|
|
}
|
|
|
|
void
|
|
vm_radix_node_free(struct pctrie *ptree, void *node)
|
|
{
|
|
uma_zfree_smr(vm_radix_node_zone, node);
|
|
}
|
|
|
|
#ifndef UMA_MD_SMALL_ALLOC
|
|
void vm_radix_reserve_kva(void);
|
|
/*
|
|
* Reserve the KVA necessary to satisfy the node allocation.
|
|
* This is mandatory in architectures not supporting direct
|
|
* mapping as they will need otherwise to carve into the kernel maps for
|
|
* every node allocation, resulting into deadlocks for consumers already
|
|
* working with kernel maps.
|
|
*/
|
|
void
|
|
vm_radix_reserve_kva(void)
|
|
{
|
|
|
|
/*
|
|
* Calculate the number of reserved nodes, discounting the pages that
|
|
* are needed to store them.
|
|
*/
|
|
if (!uma_zone_reserve_kva(vm_radix_node_zone,
|
|
((vm_paddr_t)vm_cnt.v_page_count * PAGE_SIZE) / (PAGE_SIZE +
|
|
pctrie_node_size())))
|
|
panic("%s: unable to reserve KVA", __func__);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Initialize the UMA slab zone.
|
|
*/
|
|
void
|
|
vm_radix_zinit(void)
|
|
{
|
|
|
|
vm_radix_node_zone = uma_zcreate("RADIX NODE", pctrie_node_size(),
|
|
NULL, NULL, pctrie_zone_init, NULL,
|
|
PCTRIE_PAD, UMA_ZONE_VM | UMA_ZONE_SMR);
|
|
vm_radix_smr = uma_zone_get_smr(vm_radix_node_zone);
|
|
}
|
|
|
|
void
|
|
vm_radix_wait(void)
|
|
{
|
|
uma_zwait(vm_radix_node_zone);
|
|
}
|