diff options
Diffstat (limited to 'drivers/staging/lustre/lnet/libcfs/linux/linux-mem.c')
| -rw-r--r-- | drivers/staging/lustre/lnet/libcfs/linux/linux-mem.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lnet/libcfs/linux/linux-mem.c b/drivers/staging/lustre/lnet/libcfs/linux/linux-mem.c new file mode 100644 index 000000000000..86f32ffc5d04 --- /dev/null +++ b/drivers/staging/lustre/lnet/libcfs/linux/linux-mem.c @@ -0,0 +1,59 @@ +/* + * 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); |