Re: 2.1.76, nfs client, and memory fragmentation
kwrohrer@enteract.com
Sun, 28 Dec 1997 15:49:32 -0600 (CST)
And lo, Alan Cox saith unto me:
> > can write it bottom-up, except I haven't found yet how to determine the
> > address of the memory management structures for a page given its physical
> > address (i.e. find the buddy of a free page so I can try to free it...).
>
> Not only that - but there may be several of them, and they may be in use.
Well, yes, there's 1<<order pages in the free group whose buddy I'd be trying
to free, and thus 1<<order pages of buddy... Making an order-d hunk of
free pages may well be an O(order-d) operation, but shouldn't be worse than
that, I'd hope...
Keith