| Message ID | 20210713211502.464259-7-nitesh@redhat.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | genirq: Cleanup the usage of irq_set_affinity_hint | expand |
On Tue, Jul 13, 2021 at 05:14:54PM -0400, Nitesh Narayan Lal wrote: > The driver uses irq_set_affinity_hint() to update the affinity_hint mask > that is consumed by the userspace to distribute the interrupts and to apply > the provided mask as the affinity for its interrupts. However, > irq_set_affinity_hint() applying the provided cpumask as an affinity for > the interrupt is an undocumented side effect. > > To remove this side effect irq_set_affinity_hint() has been marked > as deprecated and new interfaces have been introduced. Hence, replace the > irq_set_affinity_hint() with the new interface irq_set_affinity_and_hint() > where the provided mask needs to be applied as the affinity and > affinity_hint pointer needs to be set and replace with > irq_update_affinity_hint() where only affinity_hint needs to be updated. > > Signed-off-by: Nitesh Narayan Lal <nitesh@redhat.com> > --- > drivers/infiniband/hw/irdma/hw.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/infiniband/hw/irdma/hw.c b/drivers/infiniband/hw/irdma/hw.c > index 7afb8a6a0526..7f13a051d4de 100644 > --- a/drivers/infiniband/hw/irdma/hw.c > +++ b/drivers/infiniband/hw/irdma/hw.c > @@ -537,7 +537,7 @@ static void irdma_destroy_irq(struct irdma_pci_f *rf, > struct irdma_sc_dev *dev = &rf->sc_dev; > > dev->irq_ops->irdma_dis_irq(dev, msix_vec->idx); > - irq_set_affinity_hint(msix_vec->irq, NULL); > + irq_update_affinity_hint(msix_vec->irq, NULL); > free_irq(msix_vec->irq, dev_id); > } > > @@ -1087,7 +1087,7 @@ irdma_cfg_ceq_vector(struct irdma_pci_f *rf, struct irdma_ceq *iwceq, > } > cpumask_clear(&msix_vec->mask); > cpumask_set_cpu(msix_vec->cpu_affinity, &msix_vec->mask); > - irq_set_affinity_hint(msix_vec->irq, &msix_vec->mask); > + irq_set_affinity_and_hint(msix_vec->irq, &msix_vec->mask); I think that it needs to be irq_update_affinity_hint(). > if (status) { > ibdev_dbg(&rf->iwdev->ibdev, "ERR: ceq irq config fail\n"); > return IRDMA_ERR_CFG; > -- > 2.27.0 >
On Wed, Jul 14, 2021 at 8:03 AM Leon Romanovsky <leonro@nvidia.com> wrote: > > On Tue, Jul 13, 2021 at 05:14:54PM -0400, Nitesh Narayan Lal wrote: > > The driver uses irq_set_affinity_hint() to update the affinity_hint mask > > that is consumed by the userspace to distribute the interrupts and to apply > > the provided mask as the affinity for its interrupts. However, > > irq_set_affinity_hint() applying the provided cpumask as an affinity for > > the interrupt is an undocumented side effect. > > > > To remove this side effect irq_set_affinity_hint() has been marked > > as deprecated and new interfaces have been introduced. Hence, replace the > > irq_set_affinity_hint() with the new interface irq_set_affinity_and_hint() > > where the provided mask needs to be applied as the affinity and > > affinity_hint pointer needs to be set and replace with > > irq_update_affinity_hint() where only affinity_hint needs to be updated. > > > > Signed-off-by: Nitesh Narayan Lal <nitesh@redhat.com> > > --- > > drivers/infiniband/hw/irdma/hw.c | 4 ++-- > > 1 file changed, 2 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/infiniband/hw/irdma/hw.c b/drivers/infiniband/hw/irdma/hw.c > > index 7afb8a6a0526..7f13a051d4de 100644 > > --- a/drivers/infiniband/hw/irdma/hw.c > > +++ b/drivers/infiniband/hw/irdma/hw.c > > @@ -537,7 +537,7 @@ static void irdma_destroy_irq(struct irdma_pci_f *rf, > > struct irdma_sc_dev *dev = &rf->sc_dev; > > > > dev->irq_ops->irdma_dis_irq(dev, msix_vec->idx); > > - irq_set_affinity_hint(msix_vec->irq, NULL); > > + irq_update_affinity_hint(msix_vec->irq, NULL); > > free_irq(msix_vec->irq, dev_id); > > } > > > > @@ -1087,7 +1087,7 @@ irdma_cfg_ceq_vector(struct irdma_pci_f *rf, struct irdma_ceq *iwceq, > > } > > cpumask_clear(&msix_vec->mask); > > cpumask_set_cpu(msix_vec->cpu_affinity, &msix_vec->mask); > > - irq_set_affinity_hint(msix_vec->irq, &msix_vec->mask); > > + irq_set_affinity_and_hint(msix_vec->irq, &msix_vec->mask); > > I think that it needs to be irq_update_affinity_hint(). > Ah! I got a little confused from our last conversation about mlx5. IIUC mlx5 sub-function use case uses irdma (?) and that's why I thought that perhaps we would also want to define the affinity here from the beginning. In any case, I will make the change and re-post. -- Thanks Nitesh
On Wed, Jul 14, 2021 at 9:03 AM Leon Romanovsky <leonro@nvidia.com> wrote: > > On Wed, Jul 14, 2021 at 08:56:41AM -0400, Nitesh Lal wrote: > > On Wed, Jul 14, 2021 at 8:03 AM Leon Romanovsky <leonro@nvidia.com> wrote: > > > > > > On Tue, Jul 13, 2021 at 05:14:54PM -0400, Nitesh Narayan Lal wrote: > > > > The driver uses irq_set_affinity_hint() to update the affinity_hint mask > > > > that is consumed by the userspace to distribute the interrupts and to apply > > > > the provided mask as the affinity for its interrupts. However, > > > > irq_set_affinity_hint() applying the provided cpumask as an affinity for > > > > the interrupt is an undocumented side effect. > > > > > > > > To remove this side effect irq_set_affinity_hint() has been marked > > > > as deprecated and new interfaces have been introduced. Hence, replace the > > > > irq_set_affinity_hint() with the new interface irq_set_affinity_and_hint() > > > > where the provided mask needs to be applied as the affinity and > > > > affinity_hint pointer needs to be set and replace with > > > > irq_update_affinity_hint() where only affinity_hint needs to be updated. > > > > > > > > Signed-off-by: Nitesh Narayan Lal <nitesh@redhat.com> > > > > --- > > > > drivers/infiniband/hw/irdma/hw.c | 4 ++-- > > > > 1 file changed, 2 insertions(+), 2 deletions(-) > > > > > > > > diff --git a/drivers/infiniband/hw/irdma/hw.c b/drivers/infiniband/hw/irdma/hw.c > > > > index 7afb8a6a0526..7f13a051d4de 100644 > > > > --- a/drivers/infiniband/hw/irdma/hw.c > > > > +++ b/drivers/infiniband/hw/irdma/hw.c > > > > @@ -537,7 +537,7 @@ static void irdma_destroy_irq(struct irdma_pci_f *rf, > > > > struct irdma_sc_dev *dev = &rf->sc_dev; > > > > > > > > dev->irq_ops->irdma_dis_irq(dev, msix_vec->idx); > > > > - irq_set_affinity_hint(msix_vec->irq, NULL); > > > > + irq_update_affinity_hint(msix_vec->irq, NULL); > > > > free_irq(msix_vec->irq, dev_id); > > > > } > > > > > > > > @@ -1087,7 +1087,7 @@ irdma_cfg_ceq_vector(struct irdma_pci_f *rf, struct irdma_ceq *iwceq, > > > > } > > > > cpumask_clear(&msix_vec->mask); > > > > cpumask_set_cpu(msix_vec->cpu_affinity, &msix_vec->mask); > > > > - irq_set_affinity_hint(msix_vec->irq, &msix_vec->mask); > > > > + irq_set_affinity_and_hint(msix_vec->irq, &msix_vec->mask); > > > > > > I think that it needs to be irq_update_affinity_hint(). > > > > > > > Ah! I got a little confused from our last conversation about mlx5. > > > > IIUC mlx5 sub-function use case uses irdma (?) and that's why I thought > > that perhaps we would also want to define the affinity here from the beginning. > > mlx5 is connected to mlx5_ib/mlx5_vdpa e.t.c. > > Not sure about that, but I think that only mlx5 implements SIOV model. > > > > > In any case, I will make the change and re-post. > > Just FYI, I am hoping to collect more comments in the non-reviewed patches and address them in v4. Hence, I will wait for this week if I don't get anything I will just post another version by making the change in this driver. -- Thanks Nitesh
diff --git a/drivers/infiniband/hw/irdma/hw.c b/drivers/infiniband/hw/irdma/hw.c index 7afb8a6a0526..7f13a051d4de 100644 --- a/drivers/infiniband/hw/irdma/hw.c +++ b/drivers/infiniband/hw/irdma/hw.c @@ -537,7 +537,7 @@ static void irdma_destroy_irq(struct irdma_pci_f *rf, struct irdma_sc_dev *dev = &rf->sc_dev; dev->irq_ops->irdma_dis_irq(dev, msix_vec->idx); - irq_set_affinity_hint(msix_vec->irq, NULL); + irq_update_affinity_hint(msix_vec->irq, NULL); free_irq(msix_vec->irq, dev_id); } @@ -1087,7 +1087,7 @@ irdma_cfg_ceq_vector(struct irdma_pci_f *rf, struct irdma_ceq *iwceq, } cpumask_clear(&msix_vec->mask); cpumask_set_cpu(msix_vec->cpu_affinity, &msix_vec->mask); - irq_set_affinity_hint(msix_vec->irq, &msix_vec->mask); + irq_set_affinity_and_hint(msix_vec->irq, &msix_vec->mask); if (status) { ibdev_dbg(&rf->iwdev->ibdev, "ERR: ceq irq config fail\n"); return IRDMA_ERR_CFG;
The driver uses irq_set_affinity_hint() to update the affinity_hint mask that is consumed by the userspace to distribute the interrupts and to apply the provided mask as the affinity for its interrupts. However, irq_set_affinity_hint() applying the provided cpumask as an affinity for the interrupt is an undocumented side effect. To remove this side effect irq_set_affinity_hint() has been marked as deprecated and new interfaces have been introduced. Hence, replace the irq_set_affinity_hint() with the new interface irq_set_affinity_and_hint() where the provided mask needs to be applied as the affinity and affinity_hint pointer needs to be set and replace with irq_update_affinity_hint() where only affinity_hint needs to be updated. Signed-off-by: Nitesh Narayan Lal <nitesh@redhat.com> --- drivers/infiniband/hw/irdma/hw.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)