Re: super-max & super-nr

Steve Dodd (dirk@loth.demon.co.uk)
Sun, 17 Oct 1999 10:28:25 +0100


On Sat, Oct 16, 1999 at 11:01:37PM -0400, Mike A. Harris wrote:

> On a home PC with 2 IDE hard disks, max of around 16 partitions
> total, and a maximum useful simultaneous mount count of around
> 16-32 ever being used in the forseeable future...
>
> Would it be any form of an optimization to reduce super-max via
> /proc/sys? I was thinking it might reduce some overhead, perhaps
> freeing up a page or two of kernel memory or something.

Looking at the source (*cough*), you can see that it wouldn't. super-max
just maps to max_super_blocks in fs/super.c, and the system won't create a
new super if that number is >= nr_super_blocks. The actual structures are
kmalloc()d and put in a linked list.

-- 
"Damaged people are dangerous, they know they can survive"

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