linux-kernel - Re: [PATCH net 3/3] bpf: do not test for PCPU_MIN_UNIT

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Date:   Tue, 17 Oct 2017 09:29:26 -0700
From:   John Fastabend <john.fastabend@...il.com>
To:     Daniel Borkmann <daniel@...earbox.net>, davem@...emloft.net
Cc:     tj@...nel.org, ast@...nel.org, mark.rutland@....com,
        richard@....at, sp3485@...umbia.edu, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net 3/3] bpf: do not test for PCPU_MIN_UNIT_SIZE before
 percpu allocations

On 10/17/2017 07:55 AM, Daniel Borkmann wrote:
> PCPU_MIN_UNIT_SIZE is an implementation detail of the percpu
> allocator. Given we support __GFP_NOWARN now, lets just let
> the allocation request fail naturally instead. The two call
> sites from BPF mistakenly assumed __GFP_NOWARN would work, so
> no changes needed to their actual __alloc_percpu_gfp() calls
> which use the flag already.
> 
> Signed-off-by: Daniel Borkmann <daniel@...earbox.net>
> ---

Nice cleanup. Thanks!

Acked-by: John Fastabend <john.fastabend@...il.com>