Re: [LSF/MM TOPIC] irq affinity handling for high CPU count machines

2018-02-02 Thread Ming Lei
Hi Kashyap, On Fri, Feb 02, 2018 at 02:19:01PM +0530, Kashyap Desai wrote: > > > > > Today I am looking at one megaraid_sas related issue, and found > > > > > pci_alloc_irq_vectors(PCI_IRQ_AFFINITY) is used in the driver, so > > > > > looks each reply queue has been handled by more than one CPU if

RE: [LSF/MM TOPIC] irq affinity handling for high CPU count machines

2018-02-02 Thread Kashyap Desai
> > > > Today I am looking at one megaraid_sas related issue, and found > > > > pci_alloc_irq_vectors(PCI_IRQ_AFFINITY) is used in the driver, so > > > > looks each reply queue has been handled by more than one CPU if > > > > there are more CPUs than MSIx vectors in the system, which is done > > >

Re: [LSF/MM TOPIC] irq affinity handling for high CPU count machines

2018-02-01 Thread Ming Lei
ux-scsi@vger.kernel.org; linux- > > n...@lists.infradead.org; Kashyap Desai > > Subject: Re: [LSF/MM TOPIC] irq affinity handling for high CPU count > > machines > > > > On 02/01/2018 04:05 PM, Ming Lei wrote: > > > Hello Hannes, > > > > &

Re: [LSF/MM TOPIC] irq affinity handling for high CPU count machines

2018-02-01 Thread Ming Lei
Hello Hannes, On Thu, Feb 01, 2018 at 05:20:26PM +0100, Hannes Reinecke wrote: > On 02/01/2018 04:05 PM, Ming Lei wrote: > > Hello Hannes, > > > > On Mon, Jan 29, 2018 at 10:08:43AM +0100, Hannes Reinecke wrote: > >> Hi all, > >> > >> here's a topic which came up on the SCSI ML (cf thread '[RFC 0

RE: [LSF/MM TOPIC] irq affinity handling for high CPU count machines

2018-02-01 Thread Kashyap Desai
> -Original Message- > From: Hannes Reinecke [mailto:h...@suse.de] > Sent: Thursday, February 1, 2018 9:50 PM > To: Ming Lei > Cc: lsf...@lists.linux-foundation.org; linux-scsi@vger.kernel.org; linux- > n...@lists.infradead.org; Kashyap Desai > Subject: Re: [LSF/M

Re: [LSF/MM TOPIC] irq affinity handling for high CPU count machines

2018-02-01 Thread Hannes Reinecke
On 02/01/2018 04:05 PM, Ming Lei wrote: > Hello Hannes, > > On Mon, Jan 29, 2018 at 10:08:43AM +0100, Hannes Reinecke wrote: >> Hi all, >> >> here's a topic which came up on the SCSI ML (cf thread '[RFC 0/2] >> mpt3sas/megaraid_sas: irq poll and load balancing of reply queue'). >> >> When doing I/

Re: [LSF/MM TOPIC] irq affinity handling for high CPU count machines

2018-02-01 Thread Ming Lei
Hello Hannes, On Mon, Jan 29, 2018 at 10:08:43AM +0100, Hannes Reinecke wrote: > Hi all, > > here's a topic which came up on the SCSI ML (cf thread '[RFC 0/2] > mpt3sas/megaraid_sas: irq poll and load balancing of reply queue'). > > When doing I/O tests on a machine with more CPUs than MSIx vect

RE: [LSF/MM TOPIC] irq affinity handling for high CPU count machines

2018-01-29 Thread Kashyap Desai
.@lists.infradead.org; Kashyap > Desai > Subject: Re: [LSF/MM TOPIC] irq affinity handling for high CPU count > machines > > On 01/29/18 07:41, Elliott, Robert (Persistent Memory) wrote: > >> -Original Message- > >> From: Linux-nvme [mailto:linux-nvme-boun...@

Re: [LSF/MM TOPIC] irq affinity handling for high CPU count machines

2018-01-29 Thread Bart Van Assche
On 01/29/18 07:41, Elliott, Robert (Persistent Memory) wrote: -Original Message- From: Linux-nvme [mailto:linux-nvme-boun...@lists.infradead.org] On Behalf Of Hannes Reinecke Sent: Monday, January 29, 2018 3:09 AM To: lsf...@lists.linux-foundation.org Cc: linux-n...@lists.infradead.org; l

RE: [LSF/MM TOPIC] irq affinity handling for high CPU count machines

2018-01-29 Thread Elliott, Robert (Persistent Memory)
> -Original Message- > From: Linux-nvme [mailto:linux-nvme-boun...@lists.infradead.org] On Behalf > Of Hannes Reinecke > Sent: Monday, January 29, 2018 3:09 AM > To: lsf...@lists.linux-foundation.org > Cc: linux-n...@lists.infradead.org; linux-scsi@vger.kernel.org; Kashyap > Desai > Subj