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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 only,
* as published by the Free Software Foundation.
*
* This program 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 version 2 for more details (a copy is included
* in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
*/
/*
* This file creates a memory allocation primitive for Lustre, that
* allows to fallback to vmalloc allocations should regular kernel allocations
* fail due to size or system memory fragmentation.
*
* Author: Oleg Drokin <green@linuxhacker.ru>
*
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Seagate Technology.
*/
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include "../../../include/linux/libcfs/libcfs.h"
void *libcfs_kvzalloc(size_t size, gfp_t flags)
{
void *ret;
ret = kzalloc(size, flags | __GFP_NOWARN);
if (!ret)
ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL);
return ret;
}
EXPORT_SYMBOL(libcfs_kvzalloc);
void *libcfs_kvzalloc_cpt(struct cfs_cpt_table *cptab, int cpt, size_t size,
gfp_t flags)
{
void *ret;
ret = kzalloc_node(size, flags | __GFP_NOWARN,
cfs_cpt_spread_node(cptab, cpt));
if (!ret) {
WARN_ON(!(flags & (__GFP_FS|__GFP_HIGH)));
ret = vmalloc_node(size, cfs_cpt_spread_node(cptab, cpt));
}
return ret;
}
EXPORT_SYMBOL(libcfs_kvzalloc_cpt);
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