linux-kernel - Re: [PATCH v3 2/2] virtio_balloon: replace oom notifier with shrinker

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Message-ID: <5B681B41.6070205@intel.com>
Date:   Mon, 06 Aug 2018 17:56:17 +0800
From:   Wei Wang <wei.w.wang@...el.com>
To:     Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        virtio-dev@...ts.oasis-open.org, linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, linux-mm@...ck.org,
        mst@...hat.com, mhocko@...nel.org, akpm@...ux-foundation.org
Subject: Re: [PATCH v3 2/2] virtio_balloon: replace oom notifier with shrinker

On 08/03/2018 08:11 PM, Tetsuo Handa wrote:
> On 2018/08/03 17:32, Wei Wang wrote:
>> +static int virtio_balloon_register_shrinker(struct virtio_balloon *vb)
>> +{
>> +	vb->shrinker.scan_objects = virtio_balloon_shrinker_scan;
>> +	vb->shrinker.count_objects = virtio_balloon_shrinker_count;
>> +	vb->shrinker.batch = 0;
>> +	vb->shrinker.seeks = DEFAULT_SEEKS;
> Why flags field is not set? If vb is allocated by kmalloc(GFP_KERNEL)
> and is nowhere zero-cleared, KASAN would complain it.

Could you point where in the code that would complain it?
I only see two shrinker flags (NUMA_AWARE and MEMCG_AWARE), and they 
seem not related to that.


Best,
Wei