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From: Greg KH <gregkh@linuxfoundation.org>
To: Rafael David Tinoco <rafaeldtinoco@gmail.com>
Cc: stable@vger.kernel.org, andriin@fb.com, daniel@iogearbox.net,
	yanivagman@gmail.com
Subject: Re: [PATCH] bpf: Track contents of read-only maps as scalars
Date: Wed, 1 Sep 2021 10:41:28 +0200	[thread overview]
Message-ID: <YS88uFRrXFW4DOen@kroah.com> (raw)
In-Reply-To: <20210821203108.215937-2-rafaeldtinoco@gmail.com>

On Sat, Aug 21, 2021 at 05:31:08PM -0300, Rafael David Tinoco wrote:
> commit a23740ec43ba022dbfd139d0fe3eff193216272b upstream.
> 
> Maps that are read-only both from BPF program side and user space side
> have their contents constant, so verifier can track referenced values
> precisely and use that knowledge for dead code elimination, branch
> pruning, etc. This patch teaches BPF verifier how to do this.
> 
>   [Backport]
>   Already includes further build fix made at commit 2dedd7d21655 ("bpf:
>   Fix cast to pointer from integer of different size warning").

Do not do that, let us queue up the original commits instead please.

thanks,

greg k-h

      reply	other threads:[~2021-09-01  8:41 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-21 20:31 [PATCH] bpf: Track contents of read-only maps as scalars Rafael David Tinoco
2021-08-21 20:31 ` Rafael David Tinoco
2021-09-01  8:41   ` Greg KH [this message]

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