Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Mon, 22 Aug 2022 18:34:53 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     Song Liu <songliubraving@fb.com>
Cc:     Linux-MM <linux-mm@kvack.org>, lkml <linux-kernel@vger.kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        X86 ML <x86@kernel.org>, Christoph Hellwig <hch@lst.de>,
        Kernel Team <Kernel-team@fb.com>,
        "Edgecombe, Rick P" <rick.p.edgecombe@intel.com>,
        Luis Chamberlain <mcgrof@kernel.org>,
        Dave Hansen <dave.hansen@intel.com>, Song Liu <song@kernel.org>
Subject: Re: [RFC 0/5] vmalloc_exec for modules and BPF programs
Message-ID: <YwOwLYUXuSn5acIG@worktop.programming.kicks-ass.net>
References: <20220818224218.2399791-1-song@kernel.org>
 <4D089469-B32B-4347-A811-B1E5EE011307@fb.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <4D089469-B32B-4347-A811-B1E5EE011307@fb.com>
Precedence: bulk

On Mon, Aug 22, 2022 at 03:46:38PM +0000, Song Liu wrote:
> Could you please share your feedback on this? 

I've looked at it all of 5 minutes, so perhaps I've missed something.

However, I'm a little surprised you went with a second tree instead of
doing the top-down thing for data. The way you did it makes it hard to
have guard pages between text and data.