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136 lines
3.6 KiB
C
136 lines
3.6 KiB
C
/*
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* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
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* Copyright (C) 2007 The Regents of the University of California.
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* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
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* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
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* UCRL-CODE-235197
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*
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* This file is part of the SPL, Solaris Porting Layer.
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* For details, see <http://zfsonlinux.org/>.
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*
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* The SPL is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* The SPL is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with the SPL. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <sys/debug.h>
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#include <sys/vmem.h>
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#include <sys/kmem_cache.h>
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#include <linux/mm_compat.h>
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#include <linux/module.h>
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vmem_t *heap_arena = NULL;
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EXPORT_SYMBOL(heap_arena);
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vmem_t *zio_alloc_arena = NULL;
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EXPORT_SYMBOL(zio_alloc_arena);
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vmem_t *zio_arena = NULL;
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EXPORT_SYMBOL(zio_arena);
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#define VMEM_FLOOR_SIZE (4 * 1024 * 1024) /* 4MB floor */
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/*
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* Return approximate virtual memory usage based on these assumptions:
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*
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* 1) The major SPL consumer of virtual memory is the kmem cache.
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* 2) Memory allocated with vmem_alloc() is short lived and can be ignored.
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* 3) Allow a 4MB floor as a generous pad given normal consumption.
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* 4) The spl_kmem_cache_sem only contends with cache create/destroy.
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*/
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size_t
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vmem_size(vmem_t *vmp, int typemask)
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{
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spl_kmem_cache_t *skc;
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size_t alloc = VMEM_FLOOR_SIZE;
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if ((typemask & VMEM_ALLOC) && (typemask & VMEM_FREE))
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return (VMALLOC_TOTAL);
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down_read(&spl_kmem_cache_sem);
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list_for_each_entry(skc, &spl_kmem_cache_list, skc_list) {
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if (skc->skc_flags & KMC_VMEM)
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alloc += skc->skc_slab_size * skc->skc_slab_total;
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}
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up_read(&spl_kmem_cache_sem);
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if (typemask & VMEM_ALLOC)
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return (MIN(alloc, VMALLOC_TOTAL));
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else if (typemask & VMEM_FREE)
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return (MAX(VMALLOC_TOTAL - alloc, 0));
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else
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return (0);
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}
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EXPORT_SYMBOL(vmem_size);
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/*
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* Public vmem_alloc(), vmem_zalloc() and vmem_free() interfaces.
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*/
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void *
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spl_vmem_alloc(size_t size, int flags, const char *func, int line)
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{
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ASSERT0(flags & ~KM_PUBLIC_MASK);
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flags |= KM_VMEM;
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#if !defined(DEBUG_KMEM)
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return (spl_kmem_alloc_impl(size, flags, NUMA_NO_NODE));
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#elif !defined(DEBUG_KMEM_TRACKING)
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return (spl_kmem_alloc_debug(size, flags, NUMA_NO_NODE));
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#else
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return (spl_kmem_alloc_track(size, flags, func, line, NUMA_NO_NODE));
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#endif
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}
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EXPORT_SYMBOL(spl_vmem_alloc);
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void *
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spl_vmem_zalloc(size_t size, int flags, const char *func, int line)
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{
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ASSERT0(flags & ~KM_PUBLIC_MASK);
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flags |= (KM_VMEM | KM_ZERO);
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#if !defined(DEBUG_KMEM)
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return (spl_kmem_alloc_impl(size, flags, NUMA_NO_NODE));
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#elif !defined(DEBUG_KMEM_TRACKING)
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return (spl_kmem_alloc_debug(size, flags, NUMA_NO_NODE));
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#else
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return (spl_kmem_alloc_track(size, flags, func, line, NUMA_NO_NODE));
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#endif
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}
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EXPORT_SYMBOL(spl_vmem_zalloc);
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void
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spl_vmem_free(const void *buf, size_t size)
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{
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#if !defined(DEBUG_KMEM)
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return (spl_kmem_free_impl(buf, size));
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#elif !defined(DEBUG_KMEM_TRACKING)
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return (spl_kmem_free_debug(buf, size));
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#else
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return (spl_kmem_free_track(buf, size));
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#endif
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}
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EXPORT_SYMBOL(spl_vmem_free);
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int
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spl_vmem_init(void)
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{
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return (0);
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}
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void
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spl_vmem_fini(void)
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{
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}
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