2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 #include <linux/highmem.h>
20 #include <linux/slab.h>
21 #include <linux/swap.h>
22 #include <linux/blkdev.h>
23 #include <linux/backing-dev.h>
26 #include "xfs_message.h"
29 * Greedy allocation. May fail and may return vmalloced memory.
31 * Must be freed using kmem_free_large.
34 kmem_zalloc_greedy(size_t *size
, size_t minsize
, size_t maxsize
)
37 size_t kmsize
= maxsize
;
39 while (!(ptr
= kmem_zalloc_large(kmsize
))) {
40 if ((kmsize
>>= 1) <= minsize
)
49 kmem_alloc(size_t size
, xfs_km_flags_t flags
)
52 gfp_t lflags
= kmem_flags_convert(flags
);
56 ptr
= kmalloc(size
, lflags
);
57 if (ptr
|| (flags
& (KM_MAYFAIL
|KM_NOSLEEP
)))
59 if (!(++retries
% 100))
61 "possible memory allocation deadlock in %s (mode:0x%x)",
63 congestion_wait(BLK_RW_ASYNC
, HZ
/50);
68 kmem_zalloc(size_t size
, xfs_km_flags_t flags
)
72 ptr
= kmem_alloc(size
, flags
);
74 memset((char *)ptr
, 0, (int)size
);
79 kmem_free(const void *ptr
)
81 if (!is_vmalloc_addr(ptr
)) {
89 kmem_realloc(const void *ptr
, size_t newsize
, size_t oldsize
,
94 new = kmem_alloc(newsize
, flags
);
98 ((oldsize
< newsize
) ? oldsize
: newsize
));
105 kmem_zone_alloc(kmem_zone_t
*zone
, xfs_km_flags_t flags
)
108 gfp_t lflags
= kmem_flags_convert(flags
);
112 ptr
= kmem_cache_alloc(zone
, lflags
);
113 if (ptr
|| (flags
& (KM_MAYFAIL
|KM_NOSLEEP
)))
115 if (!(++retries
% 100))
117 "possible memory allocation deadlock in %s (mode:0x%x)",
119 congestion_wait(BLK_RW_ASYNC
, HZ
/50);
124 kmem_zone_zalloc(kmem_zone_t
*zone
, xfs_km_flags_t flags
)
128 ptr
= kmem_zone_alloc(zone
, flags
);
130 memset((char *)ptr
, 0, kmem_cache_size(zone
));
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