Patch still needed for 4.12 -----Original Message----- From: Jork Loeser Sent: Thursday, June 29, 2017 3:08 PM To: [email protected]; KY Srinivasan <[email protected]>; [email protected] Cc: [email protected]; [email protected]; Stephen Hemminger <[email protected]> Subject: RE: [PATCH] hv: fix msi affinity when device requests all possible CPU's
> -----Original Message----- > From: Stephen Hemminger [mailto:[email protected]] > Sent: Wednesday, June 28, 2017 4:22 PM > To: KY Srinivasan <[email protected]>; [email protected] > Cc: [email protected]; [email protected]; Stephen > Hemminger <[email protected]> > Subject: [PATCH] hv: fix msi affinity when device requests all possible CPU's > > When Intel 10G (ixgbevf) is passed to a Hyper-V guest with SR-IOV, the driver > requests affinity with all possible CPU's (0-239) even those CPU's are not > online > (and will never be). Because of this the device is unable to correctly get MSI > interrupt's setup. > > This was caused by the change in 4.12 that converted this affinity into all > possible CPU's (0-31) but then host reports an error since this is larger > than the > number of online cpu's. > > Previously, this worked (up to 4.12-rc1) because only online cpu's would be > put > in mask passed to the host. > > This patch applies only to 4.12. > The driver in linux-next needs a a different fix because of the changes to PCI > host protocol version. The vPCI patch in linux-next has the issue fixed already. Regards, Jork _______________________________________________ devel mailing list [email protected] http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
