From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: Ilya Maximets <i.maximets@samsung.com>,
dev@dpdk.org, tiwei.bie@intel.com, zhihong.wang@intel.com,
jfreimann@redhat.com, nicknickolaev@gmail.com,
bruce.richardson@intel.com, alejandro.lucero@netronome.com
Cc: dgilbert@redhat.com, stable@dpdk.org
Subject: Re: [dpdk-dev] [PATCH v3 13/19] vhost: register new regions with userfaultfd
Date: Mon, 8 Oct 2018 15:03:30 +0200 [thread overview]
Message-ID: <7e87051b-8eef-238d-0101-4e211e34a6a5@redhat.com> (raw)
In-Reply-To: <20181005123224eucas1p2eac500e48f5bb87845f8ecd6b86ff2cb~atl_eKaQ32105521055eucas1p2t@eucas1p2.samsung.com>
On 10/05/2018 02:34 PM, Ilya Maximets wrote:
> On 04.10.2018 11:13, Maxime Coquelin wrote:
>> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
>> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
>> ---
>> lib/librte_vhost/vhost_user.c | 33 ++++++++++++++++++++++++++++++++-
>> 1 file changed, 32 insertions(+), 1 deletion(-)
>>
>> diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
>> index ffb3ea60a..d61be2da6 100644
>> --- a/lib/librte_vhost/vhost_user.c
>> +++ b/lib/librte_vhost/vhost_user.c
>> @@ -968,6 +968,32 @@ vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *msg,
>> mmap_size,
>> alignment,
>> mmap_offset);
>> +
>> + if (dev->postcopy_listening) {
>> +#ifdef RTE_LIBRTE_VHOST_POSTCOPY
>> + struct uffdio_register reg_struct;
>> +
>> + reg_struct.range.start = (uint64_t)(uintptr_t)mmap_addr;
>> + reg_struct.range.len = mmap_size;
>> + reg_struct.mode = UFFDIO_REGISTER_MODE_MISSING;
>> +
>> + if (ioctl(dev->postcopy_ufd, UFFDIO_REGISTER,
>> + ®_struct)) {
>> + RTE_LOG(ERR, VHOST_CONFIG,
>> + "Failed to register ufd for region %d: (ufd = %d) %s\n",
>> + i, dev->postcopy_ufd,
>> + strerror(errno));
>> + goto err_ufd;
>> + }
>> + RTE_LOG(INFO, VHOST_CONFIG,
>> + "\t userfaultfd registered for range : %llx - %llx\n",
>> + reg_struct.range.start,
>> + reg_struct.range.start +
>> + reg_struct.range.len - 1);
>> +#else
>> + goto err_ufd;
>> +#endif
>> + }
>> }
>>
>> for (i = 0; i < dev->nr_vring; i++) {
>> @@ -983,7 +1009,7 @@ vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *msg,
>>
>> dev = translate_ring_addresses(dev, i);
>> if (!dev)
>> - goto err_mmap;
>> + goto err_ufd;
>>
>>
>> *pdev = dev;
>> @@ -994,6 +1020,11 @@ vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *msg,
>>
>> return VH_RESULT_OK;
>>
>> +err_ufd:
>> + if (dev->postcopy_ufd >= 0) {
>> + close(dev->postcopy_ufd);
>> + dev->postcopy_ufd = -1;
>> + }
>
> It's unclear why we need to close postcopy_ufd here because this
> handler doesn't allocate it and postcopy_ufd should exist before
> calling this function.
> So, IMHO, we need to close it in all the VH_RESULT_ERR cases or
> leave it for later vhost_backend_cleanup().
Right, I agree this is vhost_backend_cleanup()'s job. I will remove it
from here.
>> err_mmap:
>> free_mem_region(dev);
>> rte_free(dev->mem);
>>
next prev parent reply other threads:[~2018-10-08 13:03 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-04 8:13 [dpdk-dev] [PATCH v3 00/19] vhost: add postcopy live-migration support Maxime Coquelin
2018-10-04 8:13 ` [dpdk-dev] [PATCH v3 01/19] vhost: fix messages error checks Maxime Coquelin
2018-10-04 14:48 ` Ilya Maximets
2018-10-04 8:13 ` [dpdk-dev] [PATCH v3 02/19] vhost: fix return code of messages requiring replies Maxime Coquelin
2018-10-04 14:48 ` Ilya Maximets
2018-10-04 8:13 ` [dpdk-dev] [PATCH v3 03/19] vhost: clarify reply-ack in case a reply was already sent Maxime Coquelin
2018-10-04 14:50 ` Ilya Maximets
2018-10-04 8:13 ` [dpdk-dev] [PATCH v3 04/19] vhost: fix payload size of reply Maxime Coquelin
2018-10-04 14:49 ` Ilya Maximets
2018-10-04 8:13 ` [dpdk-dev] [PATCH v3 05/19] vhost: fix error handling when mem table gets updated Maxime Coquelin
2018-10-04 14:59 ` Ilya Maximets
2018-10-04 15:06 ` Maxime Coquelin
2018-10-04 15:11 ` Ilya Maximets
2018-10-04 8:13 ` [dpdk-dev] [PATCH v3 06/19] vhost: define postcopy protocol flag Maxime Coquelin
2018-10-04 14:59 ` Ilya Maximets
2018-10-04 8:13 ` [dpdk-dev] [PATCH v3 07/19] vhost: add number of fds to vhost-user messages and use it Maxime Coquelin
2018-10-05 9:56 ` Ilya Maximets
2018-10-08 12:56 ` Maxime Coquelin
2018-10-04 8:13 ` [dpdk-dev] [PATCH v3 08/19] vhost: pass socket fd to message handling callbacks Maxime Coquelin
2018-10-04 8:13 ` [dpdk-dev] [PATCH v3 09/19] vhost: enable fds passing when sending vhost-user messages Maxime Coquelin
2018-10-04 8:13 ` [dpdk-dev] [PATCH v3 10/19] vhost: add config flag for postcopy feature Maxime Coquelin
2018-10-05 11:55 ` Ilya Maximets
2018-10-04 8:13 ` [dpdk-dev] [PATCH v3 11/19] vhost: introduce postcopy's advise message Maxime Coquelin
2018-10-05 11:58 ` Ilya Maximets
2018-10-05 13:36 ` Maxime Coquelin
2018-10-04 8:13 ` [dpdk-dev] [PATCH v3 12/19] vhost: add support for postcopy's listen message Maxime Coquelin
2018-10-05 12:02 ` Ilya Maximets
2018-10-04 8:13 ` [dpdk-dev] [PATCH v3 13/19] vhost: register new regions with userfaultfd Maxime Coquelin
2018-10-05 12:34 ` Ilya Maximets
2018-10-08 13:03 ` Maxime Coquelin [this message]
2018-10-04 8:13 ` [dpdk-dev] [PATCH v3 14/19] vhost: avoid useless VhostUserMemory copy Maxime Coquelin
2018-10-05 12:37 ` Ilya Maximets
2018-10-04 8:13 ` [dpdk-dev] [PATCH v3 15/19] vhost: send userfault range addresses back to qemu Maxime Coquelin
2018-10-04 8:14 ` [dpdk-dev] [PATCH v3 16/19] vhost: add support to postcopy's end request Maxime Coquelin
2018-10-04 8:14 ` [dpdk-dev] [PATCH v3 17/19] vhost: enable postcopy protocol feature Maxime Coquelin
2018-10-04 8:14 ` [dpdk-dev] [PATCH v3 18/19] vhost: add flag to enable postcopy live-migration Maxime Coquelin
2018-10-05 14:24 ` Ilya Maximets
2018-10-08 16:25 ` Ilya Maximets
2018-10-08 16:54 ` Maxime Coquelin
2018-10-04 8:14 ` [dpdk-dev] [PATCH v3 19/19] net/vhost: add parameter to enable postcopy support Maxime Coquelin
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