linux-kernel - Re: [PATCH v37 1/3] virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <5C259485.2030809@intel.com>
Date:   Fri, 28 Dec 2018 11:12:05 +0800
From:   Wei Wang <wei.w.wang@...el.com>
To:     Christian Borntraeger <borntraeger@...ibm.com>,
        virtio-dev@...ts.oasis-open.org, linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org,
        linux-mm@...ck.org, mst@...hat.com, mhocko@...nel.org,
        akpm@...ux-foundation.org, dgilbert@...hat.com
CC:     torvalds@...ux-foundation.org, pbonzini@...hat.com,
        liliang.opensource@...il.com, yang.zhang.wz@...il.com,
        quan.xu0@...il.com, nilal@...hat.com, riel@...hat.com,
        peterx@...hat.com, quintela@...hat.com,
        Cornelia Huck <cohuck@...hat.com>,
        Halil Pasic <pasic@...ux.ibm.com>
Subject: Re: [PATCH v37 1/3] virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT

On 12/27/2018 08:03 PM, Christian Borntraeger wrote:
> On 27.08.2018 03:32, Wei Wang wrote:
>>   static int init_vqs(struct virtio_balloon *vb)
>>   {
>> -	struct virtqueue *vqs[3];
>> -	vq_callback_t *callbacks[] = { balloon_ack, balloon_ack, stats_request };
>> -	static const char * const names[] = { "inflate", "deflate", "stats" };
>> -	int err, nvqs;
>> +	struct virtqueue *vqs[VIRTIO_BALLOON_VQ_MAX];
>> +	vq_callback_t *callbacks[VIRTIO_BALLOON_VQ_MAX];
>> +	const char *names[VIRTIO_BALLOON_VQ_MAX];
>> +	int err;
>>
>>   	/*
>> -	 * We expect two virtqueues: inflate and deflate, and
>> -	 * optionally stat.
>> +	 * Inflateq and deflateq are used unconditionally. The names[]
>> +	 * will be NULL if the related feature is not enabled, which will
>> +	 * cause no allocation for the corresponding virtqueue in find_vqs.
>>   	 */
> This might be true for virtio-pci, but it is not for virtio-ccw.

Hi Christian,


Please try the fix patches: https://lkml.org/lkml/2018/12/27/336

Best,
Wei