linux-kernel - Re: [PATCH v7 2/2] Refactor part of the oom report in dump

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Message-Id: <20180610051215.GA20681@rapoport-lnx>
Date:   Sun, 10 Jun 2018 08:12:16 +0300
From:   Mike Rapoport <rppt@...ux.vnet.ibm.com>
To:     禹舟键 <ufo19890607@...il.com>
Cc:     akpm@...ux-foundation.org, mhocko@...e.com, rientjes@...gle.com,
        kirill.shutemov@...ux.intel.com, aarcange@...hat.com,
        penguin-kernel@...ove.sakura.ne.jp, guro@...com,
        yang.s@...baba-inc.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Wind Yu <yuzhoujian@...ichuxing.com>
Subject: Re: [PATCH v7 2/2] Refactor part of the oom report in dump_header

On Fri, Jun 08, 2018 at 05:53:14PM +0800, 禹舟键 wrote:
> 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.

Another option is to add the constraint to the oom_control structure.
 
> Thanks
> 

-- 
Sincerely yours,
Mike.