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authorKeith Busch <keith.busch@intel.com>2018-05-08 10:00:22 -0600
committerLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2018-06-28 17:25:33 +0100
commita7f58b9ecfd3c0f63703ec10f4a592cc38dbd1b8 (patch)
tree01d129814594762f718149de65d8e3fc2d436455 /drivers/net
parentLinux 4.18-rc1 (diff)
downloadlinux-dev-a7f58b9ecfd3c0f63703ec10f4a592cc38dbd1b8.tar.xz
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PCI: vmd: White list for fast interrupt handlers
Devices with slow interrupt handlers are significantly harming performance when their interrupt vector is shared with a fast device. Create a class code white list for devices with known fast interrupt handlers and let all other devices share a single vector so that they don't interfere with performance. At the moment, only the NVM Express class code is on the list, but more may be added if VMD users desire to use other low-latency devices in these domains. Signed-off-by: Keith Busch <keith.busch@intel.com> [lorenzo.pieralisi@arm.com: changelog] Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Jon Derrick: <jonathan.derrick@intel.com>
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