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author | Ilya Dryomov <ilya.dryomov@inktank.com> | 2014-01-09 20:08:21 +0200 |
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committer | Ilya Dryomov <ilya.dryomov@inktank.com> | 2014-01-26 12:34:23 +0200 |
commit | eeb0bed5572b1282009dfc2635604df5a35d1a02 (patch) | |
tree | 6b90792affac20b326daa59a59227766f746ee2f /net/ceph/ceph_common.c | |
parent | 80213a84a96c3040f5824bce646a184d5dd3dd2b (diff) | |
download | linux-next-eeb0bed5572b1282009dfc2635604df5a35d1a02.tar.gz |
libceph: add ceph_kv{malloc,free}() and switch to them
Encapsulate kmalloc vs vmalloc memory allocation and freeing logic into
two helpers, ceph_kvmalloc() and ceph_kvfree(), and switch to them.
ceph_kvmalloc() kmalloc()'s a maximum of 8 pages, anything bigger is
vmalloc()'ed with __GFP_HIGHMEM set. This changes the existing
behaviour:
- for buffers (ceph_buffer_new()), from trying to kmalloc() everything
and using vmalloc() just as a fallback
- for messages (ceph_msg_new()), from going to vmalloc() for anything
bigger than a page
- for messages (ceph_msg_new()), from disallowing vmalloc() to use high
memory
Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
Diffstat (limited to 'net/ceph/ceph_common.c')
-rw-r--r-- | net/ceph/ceph_common.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c index 43d8177a52e1..67d7721d237e 100644 --- a/net/ceph/ceph_common.c +++ b/net/ceph/ceph_common.c @@ -15,6 +15,7 @@ #include <linux/slab.h> #include <linux/statfs.h> #include <linux/string.h> +#include <linux/vmalloc.h> #include <linux/nsproxy.h> #include <net/net_namespace.h> @@ -170,6 +171,25 @@ int ceph_compare_options(struct ceph_options *new_opt, } EXPORT_SYMBOL(ceph_compare_options); +void *ceph_kvmalloc(size_t size, gfp_t flags) +{ + if (size <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) { + void *ptr = kmalloc(size, flags | __GFP_NOWARN); + if (ptr) + return ptr; + } + + return __vmalloc(size, flags | __GFP_HIGHMEM, PAGE_KERNEL); +} + +void ceph_kvfree(const void *ptr) +{ + if (is_vmalloc_addr(ptr)) + vfree(ptr); + else + kfree(ptr); +} + static int parse_fsid(const char *str, struct ceph_fsid *fsid) { |