netdev - Re: [PATCH bpf-next v2 6/9] riscv, bpf: provide RISC-V specific JIT image alloc/free

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Message-ID: <alpine.DEB.2.21.9999.2001070243310.75790@viisi.sifive.com>
Date:   Tue, 7 Jan 2020 02:47:39 -0800 (PST)
From:   Paul Walmsley <paul.walmsley@...ive.com>
To:     Björn Töpel <bjorn.topel@...il.com>
cc:     Daniel Borkmann <daniel@...earbox.net>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Alexei Starovoitov <ast@...nel.org>,
        Netdev <netdev@...r.kernel.org>, linux-riscv@...ts.infradead.org,
        bpf <bpf@...r.kernel.org>
Subject: Re: [PATCH bpf-next v2 6/9] riscv, bpf: provide RISC-V specific JIT
 image alloc/free

On Tue, 7 Jan 2020, Björn Töpel wrote:

> On Sat, 4 Jan 2020 at 02:32, Paul Walmsley <paul.walmsley@...ive.com> wrote:
>
> > Looks like Palmer's already reviewed it.  One additional request: could
> > you update the VM layout debugging messages in arch/riscv/mm/init.c to
> > include this new area?
> 
> Sure, I'll send that as a follow-up! 

Thanks.

> Related; Other archs, e.g. arm64, has moved away from dumping the VM 
> layout (commit 071929dbdd86 ("arm64: Stop printing the virtual memory 
> layout")), and instead rely on _PTDUMP. Going forward that probably 
> applies to riscv as well!

For the specific case of the page table dumper: we're waiting for the 
generic ptdump patchset to be merged first - hopefully for v5.6.  The 
RISC-V integration patches against it were posted to the lists back in 
October.  But, to me, that targets a different use-case than the VM layout 
debug print code.


- Paul