Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
MIME-Version: 1.0
References: <1527940734-35161-1-git-send-email-ufo19890607@gmail.com>
 <1527940734-35161-2-git-send-email-ufo19890607@gmail.com> <20180603124941.GA29497@rapoport-lnx>
 <CAHCio2ifo3SNH9E3GX2=q1a=MNiNnoCu+2a++yX5_xMBheya5g@mail.gmail.com>
 <CAHCio2in8NXZRanE9MS0VsSZxKaSvTy96TF59hODoNCxuQTz5A@mail.gmail.com> <20180604045812.GA15196@rapoport-lnx>
In-Reply-To: <20180604045812.GA15196@rapoport-lnx>
From:   =?UTF-8?B?56a56Iif6ZSu?= <ufo19890607@gmail.com>
Date:   Fri, 8 Jun 2018 17:53:14 +0800
Message-ID: <CAHCio2gj-DoOek0RN718TCLZsOpNPd6Ua88HPijdqezuySDjaw@mail.gmail.com>
Subject: Re: [PATCH v7 2/2] Refactor part of the oom report in dump_header
To:     rppt@linux.vnet.ibm.com
Cc:     akpm@linux-foundation.org, mhocko@suse.com, rientjes@google.com,
        kirill.shutemov@linux.intel.com, aarcange@redhat.com,
        penguin-kernel@i-love.sakura.ne.jp, guro@fb.com,
        yang.s@alibaba-inc.com, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org, Wind Yu <yuzhoujian@didichuxing.com>
Content-Type: text/plain; charset="UTF-8"
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Hi Mike
> My question was why do you call to alloc_constrained in the dump_header()
> function rather than pass the constraint that was detected a bit earlier to
> that function?

dump_header will be called by three functions: oom_kill_process,
check_panic_on_oom, out_of_memory.
We can get the constraint from the last two
functions(check_panic_on_oom, out_of_memory), but I need to
pass a new parameter(constraint) for oom_kill_process.

Thanks