Hi All,
I am using 4.7 kernel. Sometimes I see prefetchable region memory is not getting allocated ...What could be possible reason and how to debug it. Pls suggest.
In below snippet the red region doesn't appear sometimes after reboot.
root@krishna# lspci -H1 -vs '00:03.1'
00:03.1 PCI bridge: Intel Corporation Xeon E7 v4/Xeon E5 v4/Xeon E3 v4/Xeon D PCI Express Root Port 3 (rev 03) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 11
Bus: primary=00, secondary=6d, subordinate=d4, sec-latency=0
Memory behind bridge: b0500000-b7afffff
Prefetchable memory behind bridge: 0000380200000000-000038033fffffff
Capabilities: [40] Subsystem: Intel Corporation Device 0000
Capabilities: [60] MSI: Enable- Count=1/2 Maskable+ 64bit-
Capabilities: [90] Express Root Port (Slot-), MSI 00
Capabilities: [e0] Power Management version 3
mgmt1-active# find /sys | grep drivers.*00:03
/sys/bus/pci/drivers/pcieport/0000:00:03.0
This problem is not consistent. It only occurs after few reboots. Does this prefetchable memory region depends on driver or it depends on Bios?
Br/Krish
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