search for: hash_add

...if (kcov_remote_find(handle)) > + return ERR_PTR(-EEXIST); > + remote = kmalloc(sizeof(*remote), GFP_ATOMIC); > + if (!remote) > + return ERR_PTR(-ENOMEM); > + remote->handle = handle; > + remote->kcov = kcov; > + hash_add(kcov_remote_map, &remote->hnode, handle); I think it will make sense to check that there is no existing kcov with the same handle registered. Such condition will be extremely hard to debug based on episodically missing coverage. ... > void kcov_task_exit(struct task_struct *t) > {...

...> +{ > + struct kcov_remote *remote; > + > + if (kcov_remote_find(handle)) > + return ERR_PTR(-EEXIST); > + remote = kmalloc(sizeof(*remote), GFP_ATOMIC); > + if (!remote) > + return ERR_PTR(-ENOMEM); > + remote->handle = handle; > + remote->kcov = kcov; > + hash_add(kcov_remote_map, &remote->hnode, handle); > + return remote; > +} > + > > ... > > + spin_lock(&kcov_remote_lock); > + for (i = 0; i < remote_arg->num_handles; i++) { > + kcov_debug("handle %llx\n", remote_arg->handles[i]); > + if (!k...

...el: Clear execobject flags before preserving object in reuse cache intel: Export a function to re-enable implicit synchronisation Dave Airlie (2): Revert "Bump version for 2.4.75 release" intel: fix make distcheck Dongwon Kim (1): intel: update global_name before HASH_ADD Emil Velikov (16): xf86drm: use maj/min in drmParsePciDeviceInfo() xf86drm: add plumbing to not retrieve PCI device revision xf86drm: parse the separate sysfs files for vendor... info xf86drm: introduce drmGetDevice[s]2 tests/drmdevice: use drmGetDevice[s]2 test...

...lease_locks; > - } > - > - amn->adev = adev; > - init_rwsem(&amn->lock); > - amn->type = type; > - > - amn->mirror.ops = &amdgpu_hmm_mirror_ops[type]; > - r = hmm_mirror_register(&amn->mirror, mm); > - if (r) > - goto free_amn; > - > - hash_add(adev->mn_hash, &amn->node, AMDGPU_MN_KEY(mm, type)); > - > -release_locks: > - up_write(&mm->mmap_sem); > - mutex_unlock(&adev->mn_lock); > - > - return amn; > - > -free_amn: > - up_write(&mm->mmap_sem); > - mutex_unlock(&adev->mn_...

...KERNEL); - if (!amn) { - amn = ERR_PTR(-ENOMEM); - goto release_locks; - } - - amn->adev = adev; - init_rwsem(&amn->lock); - amn->type = type; - - amn->mirror.ops = &amdgpu_hmm_mirror_ops[type]; - r = hmm_mirror_register(&amn->mirror, mm); - if (r) - goto free_amn; - - hash_add(adev->mn_hash, &amn->node, AMDGPU_MN_KEY(mm, type)); - -release_locks: - up_write(&mm->mmap_sem); - mutex_unlock(&adev->mn_lock); - - return amn; - -free_amn: - up_write(&mm->mmap_sem); - mutex_unlock(&adev->mn_lock); - kfree(amn); - - return ERR_PTR(r); -} -...

...KERNEL); - if (!amn) { - amn = ERR_PTR(-ENOMEM); - goto release_locks; - } - - amn->adev = adev; - init_rwsem(&amn->lock); - amn->type = type; - - amn->mirror.ops = &amdgpu_hmm_mirror_ops[type]; - r = hmm_mirror_register(&amn->mirror, mm); - if (r) - goto free_amn; - - hash_add(adev->mn_hash, &amn->node, AMDGPU_MN_KEY(mm, type)); - -release_locks: - up_write(&mm->mmap_sem); - mutex_unlock(&adev->mn_lock); - - return amn; - -free_amn: - up_write(&mm->mmap_sem); - mutex_unlock(&adev->mn_lock); - kfree(amn); - - return ERR_PTR(r); -} -...

On Tue, Oct 29, 2019 at 07:22:37PM +0000, Yang, Philip wrote: > Hi Jason, > > I did quick test after merging amd-staging-drm-next with the > mmu_notifier branch, which includes this set changes. The test result > has different failures, app stuck intermittently, GUI no display etc. I > am understanding the changes and will try to figure out the cause. Thanks! I'm not

...if (kcov_remote_find(handle)) > + return ERR_PTR(-EEXIST); > + remote = kmalloc(sizeof(*remote), GFP_ATOMIC); > + if (!remote) > + return ERR_PTR(-ENOMEM); > + remote->handle = handle; > + remote->kcov = kcov; > + hash_add(kcov_remote_map, &remote->hnode, handle); > + return remote; > +} > + > +static struct kcov_remote_area *kcov_remote_area_get(unsigned int size) > +{ > + struct kcov_remote_area *area; > + struct list_head *pos; > + > + kcov_debug("size...

...; + + hash_for_each_possible(tdb_hash, tdb, db_link, (unsigned long)mm) + if (tdb->mm == mm && refcount_inc_not_zero(&tdb->refcnt)) { + found = true; + break; + } + + if (!found && allocated != NULL) { + tdb = allocated; + allocated = NULL; + + tdb->mm = mm; + hash_add(tdb_hash, &tdb->db_link, (unsigned long)mm); + refcount_set(&tdb->refcnt, 1); + } + + spin_unlock(&tdb_lock); + + if (allocated != NULL) + target_db_free(allocated); + + if (found || tdb == NULL) + return tdb; + + /* + * register a mmu notifier when adding this entry to the li...

From: Jason Gunthorpe <jgg at mellanox.com> 8 of the mmu_notifier using drivers (i915_gem, radeon_mn, umem_odp, hfi1, scif_dma, vhost, gntdev, hmm) drivers are using a common pattern where they only use invalidate_range_start/end and immediately check the invalidating range against some driver data structure to tell if the driver is interested. Half of them use an interval_tree, the others

From: Jason Gunthorpe <jgg at mellanox.com> 8 of the mmu_notifier using drivers (i915_gem, radeon_mn, umem_odp, hfi1, scif_dma, vhost, gntdev, hmm) drivers are using a common pattern where they only use invalidate_range_start/end and immediately check the invalidating range against some driver data structure to tell if the driver is interested. Half of them use an interval_tree, the others

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VM-s (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VM-s (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place