Kernel parameters
If the HMC media device driver has been compiled into the
kernel, you set the cache size by adding the hmcdrv.cachesize= parameter to the
kernel parameter line.
where <size> is the cache size in bytes. The specification must be a
multiple of 2048. You can use the suffixes K for kilobytes, M for megabytes, or G for gigabytes.
Specify 0 to not cache any media content. By default, the cache size is 534288
bytes (0.5 MB).
Loading the hmcdrv module creates a device node at
/dev/hmcdrv.
Example
The following specifications are equivalent:hmcdrv.cachesize=153600hmcdrv.cachesize=150K