[PATCH v2 0/3] Preventing job distribution to isolated CPUs

[Nitesh Narayan Lal <nitesh@redhat.com>]

                                                                           
Testing                                                                    
=======                                                                    
* Patch 1:                                                                 
  Fix for cpumask_local_spread() is tested by creating VFs, loading        
  iavf module and by adding a tracepoint to confirm that only housekeeping 
  CPUs are picked when an appropriate profile is set up and all remaining  
  CPUs when no CPU isolation is configured.                                
                                                                           
* Patch 2:                                                                 
  To test the PCI fix, I hotplugged a virtio-net-pci from qemu console     
  and forced its addition to a specific node to trigger the code path that 
  includes the proposed fix and verified that only housekeeping CPUs       
  are included via tracepoint.                                             
                                                                           
* Patch 3:                                                                 
  To test the fix in store_rps_map(), I tried configuring an isolated      
  CPU by writing to /sys/class/net/en*/queues/rx*/rps_cpus which           
  resulted in 'write error: Invalid argument' error. For the case          
  where a non-isolated CPU is writing in rps_cpus the above operation      
  succeeded without any error.                                             
                                                                           
                                                                           
Changes from v1:                                                           
===============                                                            
- Included the suggestions made by Bjorn Helgaas in the commit messages.    
- Included the 'Reviewed-by' and 'Acked-by' received for Patch-2.          
                                                                           
[1] https://patchwork.ozlabs.org/project/netdev/patch/51102eebe62336c6a4e584c7a503553b9f90e01c.camel@marvell.com/
                                                                           
Alex Belits (3):                                                           
  lib: Restrict cpumask_local_spread to houskeeping CPUs                   
  PCI: Restrict probe functions to housekeeping CPUs                       
  net: Restrict receive packets queuing to housekeeping CPUs               
                                                                           
 drivers/pci/pci-driver.c |  5 ++++-                                       
 lib/cpumask.c            | 43 +++++++++++++++++++++++-----------------    
 net/core/net-sysfs.c     | 10 +++++++++-                                  
 3 files changed, 38 insertions(+), 20 deletions(-)                        
                                                                           
--