On 2021-12-08 7:03 p.m., Felix Kuehling
wrote:
There are seven list_heads in struct svm_range: list, update_list, remove_list, insert_list, svm_bo_list, deferred_list, child_list. This patch and the next one remove two of them that are redundant. The insert_list head was only used for new ranges that are not on the svms->list yet. So we can use that list head for keeping track of new ranges before they get added, and use list_move_tail to move them to the svms->list when ready.
prange->insert_list was added to handle rollback case if
migration failed, to avoid insert_list is corrupted, now this is
not needed as we changed rollback logic.
Reviewed-by: Philip Yang <Philip.Yang@xxxxxxx>
Signed-off-by: Felix Kuehling <Felix.Kuehling@xxxxxxx> --- drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 17 ++++++++--------- drivers/gpu/drm/amd/amdkfd/kfd_svm.h | 2 -- 2 files changed, 8 insertions(+), 11 deletions(-) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c index c178d56361d6..dea7c6236be5 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c @@ -107,7 +107,7 @@ static void svm_range_add_to_svms(struct svm_range *prange) pr_debug("svms 0x%p prange 0x%p [0x%lx 0x%lx]\n", prange->svms, prange, prange->start, prange->last); - list_add_tail(&prange->list, &prange->svms->list); + list_move_tail(&prange->list, &prange->svms->list); prange->it_node.start = prange->start; prange->it_node.last = prange->last; interval_tree_insert(&prange->it_node, &prange->svms->objects); @@ -296,7 +296,6 @@ svm_range *svm_range_new(struct svm_range_list *svms, uint64_t start, INIT_LIST_HEAD(&prange->list); INIT_LIST_HEAD(&prange->update_list); INIT_LIST_HEAD(&prange->remove_list); - INIT_LIST_HEAD(&prange->insert_list); INIT_LIST_HEAD(&prange->svm_bo_list); INIT_LIST_HEAD(&prange->deferred_list); INIT_LIST_HEAD(&prange->child_list); @@ -995,7 +994,7 @@ svm_range_split_tail(struct svm_range *prange, int r = svm_range_split(prange, prange->start, new_last, &tail); if (!r) - list_add(&tail->insert_list, insert_list); + list_add(&tail->list, insert_list); return r; } @@ -1007,7 +1006,7 @@ svm_range_split_head(struct svm_range *prange, int r = svm_range_split(prange, new_start, prange->last, &head); if (!r) - list_add(&head->insert_list, insert_list); + list_add(&head->list, insert_list); return r; } @@ -1880,7 +1879,7 @@ svm_range_add(struct kfd_process *p, uint64_t start, uint64_t size, } list_add(&old->remove_list, remove_list); - list_add(&prange->insert_list, insert_list); + list_add(&prange->list, insert_list); list_add(&prange->update_list, update_list); if (node->start < start) { @@ -1912,7 +1911,7 @@ svm_range_add(struct kfd_process *p, uint64_t start, uint64_t size, goto out; } - list_add(&prange->insert_list, insert_list); + list_add(&prange->list, insert_list); list_add(&prange->update_list, update_list); } @@ -1927,13 +1926,13 @@ svm_range_add(struct kfd_process *p, uint64_t start, uint64_t size, r = -ENOMEM; goto out; } - list_add(&prange->insert_list, insert_list); + list_add(&prange->list, insert_list); list_add(&prange->update_list, update_list); } out: if (r) - list_for_each_entry_safe(prange, tmp, insert_list, insert_list) + list_for_each_entry_safe(prange, tmp, insert_list, list) svm_range_free(prange); return r; @@ -3217,7 +3216,7 @@ svm_range_set_attr(struct kfd_process *p, uint64_t start, uint64_t size, goto out; } /* Apply changes as a transaction */ - list_for_each_entry_safe(prange, next, &insert_list, insert_list) { + list_for_each_entry_safe(prange, next, &insert_list, list) { svm_range_add_to_svms(prange); svm_range_add_notifier_locked(mm, prange); } diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.h b/drivers/gpu/drm/amd/amdkfd/kfd_svm.h index 6dc91c33e80f..c3738bd35a3e 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.h +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.h @@ -76,7 +76,6 @@ struct svm_work_list_item { * @list: link list node, used to scan all ranges of svms * @update_list:link list node used to add to update_list * @remove_list:link list node used to add to remove list - * @insert_list:link list node used to add to insert list * @mapping: bo_va mapping structure to create and update GPU page table * @npages: number of pages * @dma_addr: dma mapping address on each GPU for system memory physical page @@ -113,7 +112,6 @@ struct svm_range { struct list_head list; struct list_head update_list; struct list_head remove_list; - struct list_head insert_list; uint64_t npages; dma_addr_t *dma_addr[MAX_GPU_INSTANCE]; struct ttm_resource *ttm_res;
