Re: Does Linux have plan to support memory hole remapping?

["Zhao Forrest" <forrest.zhao@gmail.com>]

> There is some loss of memory before MemTotal, both from the BIOS
> (SMM, Frame Buffer for integrated graphics etc.) and from the kernel
> (mem_map which costs a few percent and some other data structures
> which are allocated early)
>
> I covered this in detail in http://halobates.de/memorywaste.pdf
>

I read your paper, which is very helpful for us to understand the
memory usage in Linux kernel.
And I have a question about output of slabtop:
 Active / Total Objects (% used)    : 730986 / 750823 (97.4%)
 Active / Total Slabs (% used)      : 46124 / 46125 (100.0%)
 Active / Total Caches (% used)     : 99 / 149 (66.4%)
 Active / Total Size (% used)       : 169383.63K / 172467.11K (98.2%)

Could you please elaborate on Active / Total Caches? The meaning of
other lines are obvious to me.

Thanks,
Forrest