TraderJoeChicago's questions

I would like to ban interrupts from certain CPUs. I heard about the IRQBALANCE_BANNED_CPUS option. I see irqbalance is running in the background of my machine. Where do I go to edit and how do I configure that option? For example, I want to exclude cpus 2,3,4,5 from interrupts. The argument descriptor is:

Provides a mask of cpus which irqbalance should ignore and never assign interrupts to

What does it mean by a mask? And where do I configure irqbalance with that option?

EDIT1: How to know that my configuration is in effect, in other words that my cpu is receiving NO interrupts? I am checking /proc/interrupts but some numbers are increasing there.

EDIT2: Now I booted my machine with IRQBALANCE_BANNED_CPUS=3e so only CPU 0 is NOT banned from interrupts. So I should expect to see cpo0 receiving a lot of interrupts and the other cpus not receiving interrupts, right? Here is my /proc/interrupts. The lines in bold are changing for ALL cpus. Lines 22, 24, 35 and LOC are changing.

            CPU0       CPU1       CPU2       CPU3       CPU4       CPU5       
   0:         26          0          0          0          0          0   IO-APIC-edge      timer
   1:          2          0          0          0          0          0   IO-APIC-edge      i8042
   6:          3          0          0          0          0          0   IO-APIC-edge      floppy
   8:          1          0          0          0          0          0   IO-APIC-edge      rtc0
   9:          0          0          0          0          0          0   IO-APIC-fasteoi   acpi
  12:          4          0          0          0          0          0   IO-APIC-edge      i8042
  14:      13556          0          0          0          0          0   IO-APIC-edge      ata_piix
  15:          0          0          0          0          0          0   IO-APIC-edge      ata_piix
  18:          0          0          0          0          0          0   IO-APIC-fasteoi   ata_piix
  19:          2          0          0          0          0          0   IO-APIC-fasteoi   ohci1394
  20:          3          0          0          0          0          0   IO-APIC-fasteoi   ehci_hcd:usb2, uhci_hcd:usb3, uhci_hcd:usb6
  21:        197        635         39          0          0          0   IO-APIC-fasteoi   uhci_hcd:usb4, uhci_hcd:usb7, HDA Intel
  22:        344       3506          0        702          0          0   IO-APIC-fasteoi   ehci_hcd:usb1, uhci_hcd:usb5, uhci_hcd:usb8
  24:        162         48          0          0          0          0   IO-APIC-fasteoi   nvidia
  35:        174          0         47          0          0          0   IO-APIC-fasteoi   nvidia
  53:       3517          0          0          0          0          0   PCI-MSI-edge      eth0
 NMI:          0          0          0          0          0          0   Non-maskable interrupts
 LOC:      11007       8840       6480       5652       4272       3046   Local timer interrupts
 SPU:          0          0          0          0          0          0   Spurious interrupts
 PMI:          0          0          0          0          0          0   Performance monitoring interrupts
 PND:          0          0          0          0          0          0   Performance pending work
 RES:        292        169        217        125        122        126   Rescheduling interrupts
 CAL:         86        280        254        292        293        291   Function call interrupts
 TLB:       1147       1031       1348        616        177        322   TLB shootdowns
 TRM:          0          0          0          0          0          0   Thermal event interrupts
 THR:          0          0          0          0          0          0   Threshold APIC interrupts
 MCE:          0          0          0          0          0          0   Machine check exceptions
 MCP:          2          2          2          2          2          2   Machine check polls
 ERR:          5
 MIS:          0

EDIT3: It looks like IRQBALANCE_BANNED_CPUS option is completely IGNORED on Ubuntu. I tried rebooting my machine with 1, 3e and got interrupts all over. Just when I disable irqbalance by setting ENABLED=0 that I get a clean /proc/interrupts just on cpu0 and no other cpu.

I have a ubuntu server 64-bit that needs to be migrated out of a broken desktop hardware. I have a lot of things installed over there so my goal is to avoid having to install all software one-by-one in the new server. What I would like to do is take a snapshot of what I have in that machine and transfer the whole thing, in a single step to the Amazon cloud. Like taking an image of my system and transporting to another hardware so I get the exact same thing running in the new hardware.

Is that possible? How?

Thanks very much. My desktop is booting that's why I am kind of desperate to do this.

I tried using vsftpd but the result was that my user had access to the whole filesystem.

I created a group www, changed /var/www to belong to that group and then added the new user 'ftpuser' to this group.

But when I logged the user had access to everything in the filesystem.

Is there a good and simple ftp server for linux that you guys recommend? I need to be able to easily manage permissions, like which user access which directories.

Thanks,

-Sergio