Re: the new VMt

Ingo Molnar
2000-09-25T16:19:07Z

On Mon, 25 Sep 2000, Andi Kleen wrote:

> An important exception in 2.2/2.4 is NFS with bigger rsize (will be fixed
> in 2.5, but 2.4 does it this way). For an 8K r/wsize you need reliable
> (=GFP_ATOMIC) 16K allocations.

the discussion does not affect GFP_ATOMIC - GFP_ATOMIC allocators *must*
be prepared to handle occasional oom situations gracefully.

> Another thing I would worry about are ports with multiple user page
> sizes in 2.5. Another ugly case is the x86-64 port which has 4K pages
> but may likely need a 16K kernel stack due to the 64bit stack bloat.

yep, but these cases are not affected, i think in the order != 0 case we
should return NULL if a certain number of iterations did not yield any
free page.

Ingo