netdev - Re: [PATCH 11/12] riscv: extable: add a dedicated uaccess handler

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Date:   Sun, 23 Jan 2022 17:12:40 +0800
From:   Jisheng Zhang <jszhang@...nel.org>
To:     Mayuresh Chitale <mchitale@...tanamicro.com>
Cc:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Björn Töpel <bjorn@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Kefeng Wang <wangkefeng.wang@...wei.com>,
        Tong Tiangen <tongtiangen@...wei.com>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-kbuild@...r.kernel.org
Subject: Re: [PATCH 11/12] riscv: extable: add a dedicated uaccess handler

On Fri, Jan 21, 2022 at 08:16:51PM +0800, Jisheng Zhang wrote:
> On Thu, Jan 20, 2022 at 11:45:34PM +0530, Mayuresh Chitale wrote:
> > Hello Jisheng,
> 
> Hi,
> 
> > 
> > Just wanted to inform you that this patch breaks the writev02 test
> > case in LTP and if it is reverted then the test passes. If we run the
> > test through strace then we see that the test hangs and following is
> > the last line printed by strace:
> > 
> > "writev(3, [{iov_base=0x7fff848a6000, iov_len=8192}, {iov_base=NULL,
> > iov_len=0}]"
> > 
> 
> Thanks for the bug report. I will try to fix it.

Hi Mayuresh,

I just sent out a fix for this bug. Per my test, the issue is fixed.
Could you please try?

Thanks