Re: [PATCH] slab: prevent warnings when allocating with __GFP_NOWARN

Christoph Lameter
2013-06-12T13:01:43Z

On Tue, 11 Jun 2013, Eric Dumazet wrote:

> Yes and no : adding a test to select vmalloc()/vfree() instead of
> kmalloc()/kfree() will slow down regular users asking 32 pages in their
> pipe.

But vmalloc would allow buffers larger than MAX_PAGE_ORDER. The allocation
would not fail. You could have 1G or so pipes if necessary.

> If there is no _sensible_ use for large pipes even for root, please do
> not bloat the code just because we can.

Some code bloat to enable super sized pipes may be ok?

Huge page support could be useful to increase speed?