mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2024-12-30 21:09:38 +03:00
7cf1fe6331
As of cppcheck 1.82 warnings are issued when using the list_for_each_* functions with an uninitialized variable. Functionally, this is fine but to resolve the warning initialize these variables. Reviewed-by: Tony Hutter <hutter2@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #9732
136 lines
3.6 KiB
C
136 lines
3.6 KiB
C
/*
|
|
* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
|
|
* Copyright (C) 2007 The Regents of the University of California.
|
|
* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
|
|
* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
|
|
* UCRL-CODE-235197
|
|
*
|
|
* This file is part of the SPL, Solaris Porting Layer.
|
|
* For details, see <http://zfsonlinux.org/>.
|
|
*
|
|
* The SPL is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
* The SPL is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with the SPL. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <sys/debug.h>
|
|
#include <sys/vmem.h>
|
|
#include <sys/kmem_cache.h>
|
|
#include <sys/shrinker.h>
|
|
#include <linux/module.h>
|
|
|
|
vmem_t *heap_arena = NULL;
|
|
EXPORT_SYMBOL(heap_arena);
|
|
|
|
vmem_t *zio_alloc_arena = NULL;
|
|
EXPORT_SYMBOL(zio_alloc_arena);
|
|
|
|
vmem_t *zio_arena = NULL;
|
|
EXPORT_SYMBOL(zio_arena);
|
|
|
|
#define VMEM_FLOOR_SIZE (4 * 1024 * 1024) /* 4MB floor */
|
|
|
|
/*
|
|
* Return approximate virtual memory usage based on these assumptions:
|
|
*
|
|
* 1) The major SPL consumer of virtual memory is the kmem cache.
|
|
* 2) Memory allocated with vmem_alloc() is short lived and can be ignored.
|
|
* 3) Allow a 4MB floor as a generous pad given normal consumption.
|
|
* 4) The spl_kmem_cache_sem only contends with cache create/destroy.
|
|
*/
|
|
size_t
|
|
vmem_size(vmem_t *vmp, int typemask)
|
|
{
|
|
spl_kmem_cache_t *skc = NULL;
|
|
size_t alloc = VMEM_FLOOR_SIZE;
|
|
|
|
if ((typemask & VMEM_ALLOC) && (typemask & VMEM_FREE))
|
|
return (VMALLOC_TOTAL);
|
|
|
|
|
|
down_read(&spl_kmem_cache_sem);
|
|
list_for_each_entry(skc, &spl_kmem_cache_list, skc_list) {
|
|
if (skc->skc_flags & KMC_VMEM)
|
|
alloc += skc->skc_slab_size * skc->skc_slab_total;
|
|
}
|
|
up_read(&spl_kmem_cache_sem);
|
|
|
|
if (typemask & VMEM_ALLOC)
|
|
return (MIN(alloc, VMALLOC_TOTAL));
|
|
else if (typemask & VMEM_FREE)
|
|
return (MAX(VMALLOC_TOTAL - alloc, 0));
|
|
else
|
|
return (0);
|
|
}
|
|
EXPORT_SYMBOL(vmem_size);
|
|
|
|
/*
|
|
* Public vmem_alloc(), vmem_zalloc() and vmem_free() interfaces.
|
|
*/
|
|
void *
|
|
spl_vmem_alloc(size_t size, int flags, const char *func, int line)
|
|
{
|
|
ASSERT0(flags & ~KM_PUBLIC_MASK);
|
|
|
|
flags |= KM_VMEM;
|
|
|
|
#if !defined(DEBUG_KMEM)
|
|
return (spl_kmem_alloc_impl(size, flags, NUMA_NO_NODE));
|
|
#elif !defined(DEBUG_KMEM_TRACKING)
|
|
return (spl_kmem_alloc_debug(size, flags, NUMA_NO_NODE));
|
|
#else
|
|
return (spl_kmem_alloc_track(size, flags, func, line, NUMA_NO_NODE));
|
|
#endif
|
|
}
|
|
EXPORT_SYMBOL(spl_vmem_alloc);
|
|
|
|
void *
|
|
spl_vmem_zalloc(size_t size, int flags, const char *func, int line)
|
|
{
|
|
ASSERT0(flags & ~KM_PUBLIC_MASK);
|
|
|
|
flags |= (KM_VMEM | KM_ZERO);
|
|
|
|
#if !defined(DEBUG_KMEM)
|
|
return (spl_kmem_alloc_impl(size, flags, NUMA_NO_NODE));
|
|
#elif !defined(DEBUG_KMEM_TRACKING)
|
|
return (spl_kmem_alloc_debug(size, flags, NUMA_NO_NODE));
|
|
#else
|
|
return (spl_kmem_alloc_track(size, flags, func, line, NUMA_NO_NODE));
|
|
#endif
|
|
}
|
|
EXPORT_SYMBOL(spl_vmem_zalloc);
|
|
|
|
void
|
|
spl_vmem_free(const void *buf, size_t size)
|
|
{
|
|
#if !defined(DEBUG_KMEM)
|
|
return (spl_kmem_free_impl(buf, size));
|
|
#elif !defined(DEBUG_KMEM_TRACKING)
|
|
return (spl_kmem_free_debug(buf, size));
|
|
#else
|
|
return (spl_kmem_free_track(buf, size));
|
|
#endif
|
|
}
|
|
EXPORT_SYMBOL(spl_vmem_free);
|
|
|
|
int
|
|
spl_vmem_init(void)
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
spl_vmem_fini(void)
|
|
{
|
|
}
|