about SLAB.C

["fulixiong" <nflx@163.net>]

hello

 

   I  develop a pci driver in redhat linux , the kernel version is 2.4.7.
that need to allocate a 2 M DMA buffer . Linux limit 128 k,
so I  update slab.c and  content
 :

 

#if  PAGE_SIZE=4096
    {512,NULL,NULL},// Older is {32,NULL,NULL}
#endif
    {64,NULL,NULL},
    {128,NULL,NULL},
 ..............

 

then rebuild the kernel, reboot ...
it has a error  :
 
"kmem_cache_create :couldn't create cache 512 ."

 

can I help me ?

 

best regards