[question] how to increase the number of object on cache?

[Shawn Joo <sjoo@xxxxxxxxxx>]

Dear Experts,

 

I would like to know a mechanism, how to increase the number of object and where the memory is from.

(because when cache is created by "kmem_cache_create", there is only object size, but no number of the object)

For example, “size-65536” does not have available memory from below dump.

In that state, if memory allocation is requested to “size-65536”,

1.     How to allocate/increase the number of object on “size-65536”?

2.     Where is the new allocated memory from? (from buddy?)

 

I believe it is hard to explain with simple word, any advice will be very helpful.

 

cat /proc/buddyinfo

Node 0, zone   Normal    949      0      0      2      3      3      0      0      1      1      0

 

cat /proc/slabinfo

slabinfo - version: 2.1

# name            <active_objs> <num_objs> <objsize> <objperslab> <pagesperslab> : tunables <limit> <batchcount> <sharedfactor> : slabdata <active_slabs> <num_slabs> <sharedavail>

size-4194304           0      0 4194304    1 1024 : tunables    1    1    0 : slabdata      0      0      0

size-2097152           0      0 2097152    1  512 : tunables    1    1    0 : slabdata      0      0      0

size-1048576           0      0 1048576    1  256 : tunables    1    1    0 : slabdata      0      0      0

size-524288            0      0 524288    1  128 : tunables    1    1    0 : slabdata      0      0      0

size-262144            0      0 262144    1   64 : tunables    1    1    0 : slabdata      0      0      0

size-131072            1      1 131072    1   32 : tunables    8    4    0 : slabdata      1      1      0

size-65536             4      4  65536    1   16 : tunables    8    4    0 : slabdata      4      4      0

 

 

 

Thanks,

Seongho(Shawn)

 

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