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

[Sasha Levin]

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
> dangerous.

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."


Thanks,
Sasha
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