-----Original Message----- From: Hannes Reinecke [mailto:hare@xxxxxxx] Sent: Tuesday, December 18, 2018 1:57 AM To: Don Brace <don.brace@xxxxxxxxxxxxx>; Kevin Barnett - C33748 <Kevin.Barnett@xxxxxxxxxxxxx>; Scott Teel - C33730 <Scott.Teel@xxxxxxxxxxxxx>; Justin Lindley - C33718 <Justin.Lindley@xxxxxxxxxxxxx>; Scott Benesh - C33703 <Scott.Benesh@xxxxxxxxxxxxx>; bader.alisaleh@xxxxxxxxxxxxx; Gerry Morong - C33720 <Gerry.Morong@xxxxxxxxxxxxx>; Mahesh Rajashekhara - I30583 <Mahesh.Rajashekhara@xxxxxxxxxxxxx>; hch@xxxxxxxxxxxxx; jejb@xxxxxxxxxxxxxxxxxx; joseph.szczypek@xxxxxxx; POSWALD@xxxxxxxx; shunyong.yang@xxxxxxxxxxxxxxxx Cc: linux-scsi@xxxxxxxxxxxxxxx Subject: Re: [PATCH] hpsa: add module parameter to disable irq affinity EXTERNAL EMAIL On 12/3/18 11:35 PM, Don Brace wrote: > The PCI_IRQ_AFFINITY flag prevents customers from changing the > smp_affinity and smp_affinity_list entries. > > - add a module parameter to allow this flag to be turned > off. > > - to turn off PCI_IRQ_AFFINITY: > flag hpsa_disable_irq_affinity=1 > > Reviewed-by: David Carroll <david.carroll@xxxxxxxxxxxxx> > Reviewed-by: Scott Teel <scott.teel@xxxxxxxxxxxxx> > Signed-off-by: Don Brace <don.brace@xxxxxxxxxxxxx> > --- > drivers/scsi/hpsa.c | 13 ++++++++++--- > 1 file changed, 10 insertions(+), 3 deletions(-) > > diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index > c9cccf35e9d7..0aa5aa66151f 100644 > --- a/drivers/scsi/hpsa.c > +++ b/drivers/scsi/hpsa.c > @@ -87,6 +87,10 @@ static int hpsa_simple_mode; > module_param(hpsa_simple_mode, int, S_IRUGO|S_IWUSR); > MODULE_PARM_DESC(hpsa_simple_mode, > "Use 'simple mode' rather than 'performant mode'"); > +static bool hpsa_disable_irq_affinity; > +module_param(hpsa_disable_irq_affinity, bool, S_IRUGO|S_IWUSR); > +MODULE_PARM_DESC(hpsa_disable_irq_affinity, > + "Turn off managed irq affinity. Allows smp_affinity to be > +changed."); > > /* define the PCI info for the cards we can control */ > static const struct pci_device_id hpsa_pci_device_id[] = { @@ > -7389,7 +7393,7 @@ static void hpsa_setup_reply_map(struct ctlr_info *h) > */ > static int hpsa_interrupt_mode(struct ctlr_info *h) > { > - unsigned int flags = PCI_IRQ_LEGACY; > + unsigned int flags; > int ret; > > /* Some boards advertise MSI but don't really support it */ @@ > -7400,17 +7404,20 @@ static int hpsa_interrupt_mode(struct ctlr_info *h) > case 0x40830E11: > break; > default: > + flags = PCI_IRQ_MSIX; > + if (!hpsa_disable_irq_affinity) > + flags |= PCI_IRQ_AFFINITY; > ret = pci_alloc_irq_vectors(h->pdev, 1, MAX_REPLY_QUEUES, > - PCI_IRQ_MSIX | PCI_IRQ_AFFINITY); > + flags); > if (ret > 0) { > h->msix_vectors = ret; > return 0; > } > > - flags |= PCI_IRQ_MSI; > break; > } > > + flags = PCI_IRQ_LEGACY | PCI_IRQ_MSI; > ret = pci_alloc_irq_vectors(h->pdev, 1, 1, flags); > if (ret < 0) > return ret; > That completely breaks multiqueue. You sure about this? What is the intention here? Cheers, Hannes This patch is a result of some customers complaining that they cannot alter the smp_affinity* entries for hpsa because the vectors are managed. The message is: write error: Input/output error I added the module parameter to allow them to turn off the affinity flag so they can set the mask to whatever they want, but leaves the default behavior in-place. Is there a better method? -- Dr. Hannes Reinecke Teamlead Storage & Networking hare@xxxxxxx +49 911 74053 688 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton HRB 21284 (AG Nürnberg)
