Updated/corrected two email addresses ...
> -----Original Message----- > From: Michael Kelley (EOSG) > Sent: Wednesday, January 24, 2018 2:14 PM > To: KY Srinivasan <[email protected]>; Stephen Hemminger > <[email protected]>; > [email protected]; [email protected]; [email protected]; > [email protected]; [email protected]; > [email protected] > Cc: Michael Kelley (EOSG) <[email protected]> > Subject: [PATCH 1/1] scsi: storvsc: Spread interrupts when picking a channel > for I/O requests > > Update the algorithm in storvsc_do_io to look for a channel > starting with the current CPU + 1 and wrap around (within the > current NUMA node). This spreads VMbus interrupts more evenly > across CPUs. Previous code always started with first CPU in > the current NUMA node, skewing the interrupt load to that CPU. > > Signed-off-by: Michael Kelley <[email protected]> > --- > drivers/scsi/storvsc_drv.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c > index e07907d..f3264c4 100644 > --- a/drivers/scsi/storvsc_drv.c > +++ b/drivers/scsi/storvsc_drv.c > @@ -1310,7 +1310,8 @@ static int storvsc_do_io(struct hv_device *device, > */ > cpumask_and(&alloced_mask, &stor_device->alloced_cpus, > cpumask_of_node(cpu_to_node(q_num))); > - for_each_cpu(tgt_cpu, &alloced_mask) { > + for_each_cpu_wrap(tgt_cpu, &alloced_mask, > + outgoing_channel->target_cpu + 1) { > if (tgt_cpu != outgoing_channel->target_cpu) { > outgoing_channel = > stor_device->stor_chns[tgt_cpu]; > -- > 1.8.3.1 _______________________________________________ devel mailing list [email protected] http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
