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

From: Sasha Levin
Date: Tue Jun 11 2013 - 12:20:11 EST

On 06/11/2013 12:13 PM, Eric Dumazet wrote:
On Tue, 2013-06-11 at 11:44 -0400, Sasha Levin wrote:
On 06/11/2013 11:23 AM, Christoph Lameter wrote:
On Tue, 11 Jun 2013, Pekka Enberg wrote:

So you're OK with going forward with Sasha's patch? It's needed
because __GFP_NOWARN was specifically added there to fix this
issue earlier.

Why dont we fix the call site to use vmalloc instead for larger allocs?

We should probably be doing both.

Allowing a pipe to store thousands of page refs seems quite useless and

It might be, but you need CAP_SYS_RESOURCE to go into the dangerous
zone (>pipe_max_size).

So if root (or someone with that cap) wants to go there, as Rusty says:
"Root asked, we do."

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