/usr/bin/intel_l3_parity now shipped in intel-gpu-tools 1.7-1 (utopic)
** Changed in: intel-gpu-tools (Ubuntu)
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/1234260
Title:
Package and use 'intel_l3_parity' binary
Status in intel:
Confirmed
Status in “intel-gpu-tools” package in Ubuntu:
Fix Released
Status in “udev” package in Ubuntu:
New
Bug description:
For Haswell systems, Intel has created a new tool called
'intel_l3_parity'. They have requested that we use this so that we can
make use of the l3 parity feature on these cards. Quote:
DPF (L3 Parity): Haswell has extra cache which can be dynamically (during
run time)
used to replace cachelines which are exhibiting faulty behavior.
It follows that Haswell also has the ability to detect the errors.
Kernel driver receives the error interrupts and reports them to userspace
via udev.
The event is a parity error.
Userspace should be listening for the udev events, and handling them in
whatever way
they see fit.
We expected OSVs to add such hooks to their distributions, and use the
intel_l3_parity
tool to be invoked by their udev rules as needed.
The code for the binary can be found here, it looks like they're
planning on adding it to the linux kernel tree but afact it's not in
Linus' tree yet:
http://article.gmane.org/gmane.comp.freedesktop.xorg.drivers.intel/10847/match=intel_l3_parity
Also I haven't seen a udev script from them as yet. According to Intel
the way it works is that udev has to catch the party check and then do
the right thing by calling intel_l3_parity the right way.
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