• Ilya Dryomov's avatar
    libceph: add ceph_kv{malloc,free}() and switch to them · eeb0bed5
    Ilya Dryomov authored
    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: default avatarIlya Dryomov <ilya.dryomov@inktank.com>
    Reviewed-by: default avatarSage Weil <sage@inktank.com>
    eeb0bed5
ceph_common.c 14.8 KB