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74004e8ce4
qemu/hw
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Sameeh Jubran 74004e8ce4 e1000: Fixing interrupts pace. 
This patch introduces an upper bound for number of interrupts
per second. Without this bound an interrupt storm can occur as
it has been observed on Windows 10 when disabling the device.

According to the SPEC - Intel PCI/PCI-X Family of Gigabit
Ethernet Controllers Software Developer's Manual, section
13.4.18 - the Ethernet controller guarantees a maximum
observable interrupt rate of 7813 interrupts/sec. If there is
no upper bound this could lead to an interrupt storm by e1000
(when mit_delay < 500) causing interrupts to fire at a very high
pace.
Thus if mit_delay < 500 then the delay should be set to the
minimum delay possible which is 500. This can be calculated
easily as follows:

Interval = 10^9 / (7813 * 256) = 500.

Signed-off-by: Sameeh Jubran <sameeh@daynix.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
2016-03-30 08:57:36 +08:00
..
9pfs util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
acpi Replaced get_tick_per_sec() by NANOSECONDS_PER_SECOND 2016-03-22 22:20:17 +01:00
alpha util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
arm util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
audio Replaced get_tick_per_sec() by NANOSECONDS_PER_SECOND 2016-03-22 22:20:17 +01:00
block util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
bt util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
char Replaced get_tick_per_sec() by NANOSECONDS_PER_SECOND 2016-03-22 22:20:17 +01:00
core * Log filtering from Alex and Peter 2016-03-24 21:42:40 +00:00
cpu include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
cris util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
display Replaced get_tick_per_sec() by NANOSECONDS_PER_SECOND 2016-03-22 22:20:17 +01:00
dma Replaced get_tick_per_sec() by NANOSECONDS_PER_SECOND 2016-03-22 22:20:17 +01:00
gpio ARM: PL061: Checking register r/w accesses to reserved area 2016-02-26 15:09:42 +00:00
i2c i.MX: Add missing descriptions in devices. 2016-03-16 17:42:18 +00:00
i386 hw: explicitly include qemu-common.h and cpu.h 2016-03-22 22:20:17 +01:00
ide util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
input Replaced get_tick_per_sec() by NANOSECONDS_PER_SECOND 2016-03-22 22:20:17 +01:00
intc Replaced get_tick_per_sec() by NANOSECONDS_PER_SECOND 2016-03-22 22:20:17 +01:00
ipack include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
ipmi include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
isa hw: explicitly include qemu-common.h and cpu.h 2016-03-22 22:20:17 +01:00
lm32 util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
m68k hw: explicitly include qemu-common.h and cpu.h 2016-03-22 22:20:17 +01:00
mem include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
microblaze util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
mips util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
misc * Log filtering from Alex and Peter 2016-03-24 21:42:40 +00:00
moxie hw: explicitly include qemu-common.h and cpu.h 2016-03-22 22:20:17 +01:00
net e1000: Fixing interrupts pace. 2016-03-30 08:57:36 +08:00
nvram util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
openrisc hw: explicitly include qemu-common.h and cpu.h 2016-03-22 22:20:17 +01:00
pci util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
pci-bridge include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
pci-host include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
pcmcia hw: Clean up includes 2016-01-29 15:07:25 +00:00
ppc * Log filtering from Alex and Peter 2016-03-24 21:42:40 +00:00
s390x hw: explicitly include qemu-common.h and cpu.h 2016-03-22 22:20:17 +01:00
scsi util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
sd Replaced get_tick_per_sec() by NANOSECONDS_PER_SECOND 2016-03-22 22:20:17 +01:00
sh4 hw: explicitly include qemu-common.h and cpu.h 2016-03-22 22:20:17 +01:00
smbios include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
sparc util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
sparc64 util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
ssi hw: Clean up includes 2016-01-29 15:07:25 +00:00
timer util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
tpm include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
tricore hw: explicitly include qemu-common.h and cpu.h 2016-03-22 22:20:17 +01:00
unicore32 hw: explicitly include qemu-common.h and cpu.h 2016-03-22 22:20:17 +01:00
usb * Log filtering from Alex and Peter 2016-03-24 21:42:40 +00:00
vfio VFIO updates 2016-03-28 2016-03-29 17:39:41 +01:00
virtio hw: explicitly include qemu-common.h and cpu.h 2016-03-22 22:20:17 +01:00
watchdog util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
xen util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
xenpv xen: Clean up includes 2016-01-29 15:07:23 +00:00
xtensa hw: explicitly include qemu-common.h and cpu.h 2016-03-22 22:20:17 +01:00
Makefile.objs Add a base IPMI interface 2015-12-22 18:39:19 +02:00