From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: Tiwei Bie <tiwei.bie@intel.com>
Cc: dev@dpdk.org, yliu@fridaylinux.org, jfreiman@redhat.com,
mst@redhat.com, vkaplans@redhat.com, jasowang@redhat.com
Subject: Re: [dpdk-dev] [PATCH 07/21] vhost: add iotlb helper functions
Date: Tue, 5 Sep 2017 17:16:29 +0200 [thread overview]
Message-ID: <c9e66042-deb9-57af-59cd-26f47fc134de@redhat.com> (raw)
In-Reply-To: <20170905060200.GA28369@debian-ZGViaWFuCg>
On 09/05/2017 08:02 AM, Tiwei Bie wrote:
> On Thu, Aug 31, 2017 at 11:50:09AM +0200, Maxime Coquelin wrote:
> [...]
>> +
>> +#define IOTLB_CACHE_SIZE 1024
>> +
>> +static void vhost_user_iotlb_cache_remove_all(struct vhost_virtqueue *vq)
>> +{
>> + struct vhost_iotlb_entry *node, *temp_node;
>> +
>> + rte_rwlock_write_lock(&vq->iotlb_lock);
>> +
>> + TAILQ_FOREACH_SAFE(node, &vq->iotlb_list, next, temp_node) {
>> + TAILQ_REMOVE(&vq->iotlb_list, node, next);
>> + rte_mempool_put(vq->iotlb_pool, node);
>> + }
>> +
>> + rte_rwlock_write_unlock(&vq->iotlb_lock);
>> +}
>> +
>> +void vhost_user_iotlb_cache_insert(struct vhost_virtqueue *vq, uint64_t iova,
>> + uint64_t uaddr, uint64_t size, uint8_t perm)
>> +{
>> + struct vhost_iotlb_entry *node, *new_node;
>> + int ret;
>> +
>> + ret = rte_mempool_get(vq->iotlb_pool, (void **)&new_node);
>> + if (ret) {
>> + RTE_LOG(ERR, VHOST_CONFIG, "IOTLB pool empty, invalidate cache\n");
>
> I think the log level should be DEBUG or INFO or the likes, not ERR.
I set it to ERR because failing in this case would mean that either the
IOTLB cache has not been sized large enough and we would like it to be
reported as it would have an impact on performance and drop rate, or
that we have a malicious or buggy guest.
I'm fine with changing it to INFO though.
>> + vhost_user_iotlb_cache_remove_all(vq);
>> + ret = rte_mempool_get(vq->iotlb_pool, (void **)&new_node);
>> + if (ret) {
>> + RTE_LOG(ERR, VHOST_CONFIG, "IOTLB pool still empty, failure\n");
>> + return;
>> + }
>> + }
>> +
> [...]
>> +
>> +void vhost_user_iotlb_cache_remove(struct vhost_virtqueue *vq,
>> + uint64_t iova, uint64_t size)
>> +{
>> + struct vhost_iotlb_entry *node, *temp_node;
>> +
>> + if (unlikely(!size))
>> + return;
>> +
>> + rte_rwlock_write_lock(&vq->iotlb_lock);
>> +
>> + TAILQ_FOREACH_SAFE(node, &vq->iotlb_list, next, temp_node) {
>> + /* Sorted list */
>> + if (unlikely(node->iova >= iova + size)) {
>> + break;
>> + } else if ((node->iova < iova + size) &&
>> + (iova < node->iova + node->size)) {
>
> The `else' can be removed.
> And the check of (node->iova < iova + size) can also be removed.
Right! Fixed.
>> + TAILQ_REMOVE(&vq->iotlb_list, node, next);
>> + rte_mempool_put(vq->iotlb_pool, node);
>> + continue;
>> + }
>> + }
>> +
>> + rte_rwlock_write_unlock(&vq->iotlb_lock);
>> +}
>> +
>> +
>
> Only one empty line is needed here.
Fixed.
>> +uint64_t vhost_user_iotlb_cache_find(struct vhost_virtqueue *vq, uint64_t iova,
>> + uint64_t *size, uint8_t perm)
>> +{
> [...]
>> +#ifndef _VHOST_IOTLB_H_
>> +#define _VHOST_IOTLB_H_
>> +
>> +#include "vhost.h"
>> +void vhost_user_iotlb_cache_insert(struct vhost_virtqueue *vq, uint64_t iova,
>> + uint64_t uaddr, uint64_t size,
>> + uint8_t perm);
>
> An empty line should be added after #include "vhost.h".
Fixed.
Thanks,
Maxime
> Best regards,
> Tiwei Bie
>
next prev parent reply other threads:[~2017-09-05 15:16 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-31 9:50 [dpdk-dev] [PATCH 00/21] Vhost-user: Implement device IOTLB support Maxime Coquelin
2017-08-31 9:50 ` [dpdk-dev] [PATCH 01/21] Revert "vhost: workaround MQ fails to startup" Maxime Coquelin
2017-09-07 11:54 ` Yuanhan Liu
2017-09-07 12:59 ` Maxime Coquelin
2017-09-24 10:41 ` Maxime Coquelin
2017-08-31 9:50 ` [dpdk-dev] [PATCH 02/21] vhost: make error handling consistent in rx path Maxime Coquelin
2017-08-31 9:50 ` [dpdk-dev] [PATCH 03/21] vhost: protect virtio_net device struct Maxime Coquelin
2017-09-05 4:45 ` Tiwei Bie
2017-09-05 9:24 ` Maxime Coquelin
2017-09-05 10:07 ` Tiwei Bie
2017-09-05 11:00 ` Maxime Coquelin
2017-09-06 1:15 ` Tiwei Bie
2017-09-06 2:59 ` Stephen Hemminger
2017-09-06 7:50 ` Maxime Coquelin
2017-09-06 7:15 ` Maxime Coquelin
2017-09-06 7:30 ` Tiwei Bie
2017-09-06 20:02 ` Maxime Coquelin
2017-09-07 5:08 ` Tiwei Bie
2017-09-07 13:44 ` Yuanhan Liu
2017-09-07 14:01 ` Maxime Coquelin
2017-08-31 9:50 ` [dpdk-dev] [PATCH 04/21] vhost: prepare send_vhost_message() to slave requests Maxime Coquelin
2017-08-31 9:50 ` [dpdk-dev] [PATCH 05/21] vhost: add support to slave requests channel Maxime Coquelin
2017-09-05 4:19 ` Tiwei Bie
2017-09-05 8:18 ` Maxime Coquelin
2017-08-31 9:50 ` [dpdk-dev] [PATCH 06/21] vhost: declare missing IOMMU-related definitions for old kernels Maxime Coquelin
2017-08-31 9:50 ` [dpdk-dev] [PATCH 07/21] vhost: add iotlb helper functions Maxime Coquelin
2017-09-05 6:02 ` Tiwei Bie
2017-09-05 15:16 ` Maxime Coquelin [this message]
2017-09-08 8:08 ` Yuanhan Liu
2017-09-08 8:24 ` Maxime Coquelin
2017-09-08 8:36 ` Yuanhan Liu
2017-09-08 8:50 ` Maxime Coquelin
2017-09-08 9:21 ` Yuanhan Liu
2017-09-08 9:28 ` Maxime Coquelin
2017-08-31 9:50 ` [dpdk-dev] [PATCH 08/21] vhost: iotlb: add pending miss request list and helpers Maxime Coquelin
2017-09-05 7:11 ` Tiwei Bie
2017-09-05 15:18 ` Maxime Coquelin
2017-08-31 9:50 ` [dpdk-dev] [PATCH 09/21] vhost-user: add support to IOTLB miss slave requests Maxime Coquelin
2017-08-31 9:50 ` [dpdk-dev] [PATCH 10/21] vhost: initialize vrings IOTLB caches Maxime Coquelin
2017-09-04 13:57 ` Remy Horton
2017-09-04 15:45 ` Maxime Coquelin
2017-08-31 9:50 ` [dpdk-dev] [PATCH 11/21] vhost-user: handle IOTLB update and invalidate requests Maxime Coquelin
2017-08-31 9:50 ` [dpdk-dev] [PATCH 12/21] vhost: introduce guest IOVA to backend VA helper Maxime Coquelin
2017-09-05 4:14 ` Tiwei Bie
2017-09-05 7:05 ` Maxime Coquelin
2017-08-31 9:50 ` [dpdk-dev] [PATCH 13/21] vhost: use the guest IOVA to host " Maxime Coquelin
2017-08-31 9:50 ` [dpdk-dev] [PATCH 14/21] vhost: enable rings at the right time Maxime Coquelin
2017-08-31 9:50 ` [dpdk-dev] [PATCH 15/21] vhost: don't dereference invalid dev pointer after its reallocation Maxime Coquelin
2017-09-04 13:58 ` Remy Horton
2017-08-31 9:50 ` [dpdk-dev] [PATCH 16/21] vhost: postpone rings addresses translation Maxime Coquelin
2017-08-31 9:50 ` [dpdk-dev] [PATCH 17/21] vhost-user: translate ring addresses when IOMMU enabled Maxime Coquelin
2017-08-31 9:50 ` [dpdk-dev] [PATCH 18/21] vhost-user: iommu: postpone device creation until ring are mapped Maxime Coquelin
2017-08-31 9:50 ` [dpdk-dev] [PATCH 19/21] vhost: iommu: Invalidate vring in case of matching IOTLB invalidate Maxime Coquelin
2017-08-31 9:50 ` [dpdk-dev] [PATCH 20/21] vhost: enable IOMMU support Maxime Coquelin
2017-08-31 9:50 ` [dpdk-dev] [PATCH 21/21] vhost: iotlb: reduce iotlb read lock usage Maxime Coquelin
2017-09-11 4:18 ` Yuanhan Liu
2017-09-11 7:34 ` Maxime Coquelin
2017-09-11 9:39 ` Yuanhan Liu
2017-09-04 13:58 ` [dpdk-dev] [PATCH 00/21] Vhost-user: Implement device IOTLB support Remy Horton
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