On 02/25/2014 03:00 AM, Prarit Bhargava wrote: > > On 02/25/2014 05:21 AM, David Laight wrote: >> From: Prarit Bhargava >> ... >>> What has caused that check to be necessary is that the ixgbe driver is now >>> allocating so many interrupts that on large systems which full sockets are >>> taken >>> in and out of service, it is possible that there are not enough empty >>> vectors >>> for all the irqs on a down'd cpu. IMO what the ixgbe driver is effectively >>> doing is starving the system of resources. If I rmmod the ixgbe driver (and >>> free it's irqs of course) I have no problem in taking all cpus except 1 out >>> of >>> service. >> If I read that correctly it looks as though ixgbe should be allocating >> a number of interrupts on each cpu - for the interrupts it wants to take >> on that cpu. > Yes, the code currently does it. > >> Then taking the cpu out of service would 'just' require that the interrupts >> that are tied to that cpu be removed first? > Yes, that would happen with a cpu notifier (I've already written a simple > dummy > one that just printk's when called). I started to implement a single queue > teardown but hit some of these enumeration issues. I'd like to fix these > first > and then get to the teardown. > > P. > >
What should happen if you attempt to remove the CPU the root complex is attached to? Will that trigger a remove via the PCIe complex being removed? Thanks, Alex ------------------------------------------------------------------------------ Flow-based real-time traffic analytics software. Cisco certified tool. Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer Customize your own dashboards, set traffic alerts and generate reports. Network behavioral analysis & security monitoring. All-in-one tool. http://pubads.g.doubleclick.net/gampad/clk?id=126839071&iu=/4140/ostg.clktrk _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
