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slabinfo cache descriptions?



Where can I find descriptions of the caches controlled in /proc/slabinfo?  
Some are obvious to me, most are not.  Specifically, I'd like to identify 
which cache(s) are used to cache my database file data, but also just for 
future reference on all of them.  The cache names I'm referring to are the 
first column below...

TIA.


$ cat /proc/slabinfo 
slabinfo - version: 1.1 (SMP)
kmem_cache            80     80    244    5    5    1 :  252  126
ip_fib_hash           11    336     32    3    3    1 :  252  126
journal_head         778   1001     48   13   13    1 :  252  126
revoke_table           2    250     12    1    1    1 :  252  126
revoke_record        444    448     32    4    4    1 :  252  126
clip_arp_cache         0      0    128    0    0    1 :  252  126
ip_mrt_cache           0      0    128    0    0    1 :  252  126
tcp_tw_bucket       1140   1140    128   38   38    1 :  252  126
tcp_bind_bucket     1049   1232     32   11   11    1 :  252  126
tcp_open_request     240    240    128    8    8    1 :  252  126
inet_peer_cache        4     58     64    1    1    1 :  252  126
ip_dst_cache         525    525    256   35   35    1 :  252  126
arp_cache             12     60    128    2    2    1 :  252  126
blkdev_requests     3072   3090    128  103  103    1 :  252  126
dnotify_cache          0      0     20    0    0    1 :  252  126
file_lock_cache        2     40     96    1    1    1 :  252  126
fasync_cache           0      0     16    0    0    1 :  252  126
uid_cache             19    224     32    2    2    1 :  252  126
skbuff_head_cache    943   1110    256   74   74    1 :  252  126
sock                 277    315   1280  104  105    1 :   60   30
sigqueue             203    203    132    7    7    1 :  252  126
kiobuf                 0      0     64    0    0    1 :  252  126
cdev_cache            31    696     64   12   12    1 :  252  126
bdev_cache             4    116     64    2    2    1 :  252  126
mnt_cache             15    174     64    3    3    1 :  252  126
inode_cache        19021  39585    512 5655 5655    1 :  124   62
dentry_cache       18130  55170    128 1839 1839    1 :  252  126
dquot                  0      0    128    0    0    1 :  252  126
filp               12191  12240    128  408  408    1 :  252  126
names_cache           21     21   4096   21   21    1 :   60   30
buffer_head       1264828 1267350    128 42245 42245    1 :  252  126
mm_struct            585    585    256   39   39    1 :  252  126
vm_area_struct      7391   9030    128  301  301    1 :  252  126
fs_cache             643    754     64   13   13    1 :  252  126
files_cache          406    406    512   58   58    1 :  124   62
signal_act           321    341   1408   31   31    4 :   60   30
pae_pgd              641    754     64   13   13    1 :  252  126
size-131072(DMA)       0      0 131072    0    0   32 :    0    0
size-131072            0      0 131072    0    0   32 :    0    0
size-65536(DMA)        0      0  65536    0    0   16 :    0    0
...




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