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List:       linux-edac
Subject:    Scrubbing CE emulation possibility
From:       Andrey Korolyov <andrey () xdel ! ru>
Date:       2017-10-05 12:54:27
Message-ID: CABYiri9-MVOciOXT3voJxAASB7FU0jH9gUNKFq8nZ1BnviWboQ () mail ! gmail ! com
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Hi,

few months ago I occasionally observed logged scrub CEs and non-zero
CE counters within sysfs on a Haswell platform while userspace
edac-util reported nothing. At this moment I was busy and postponed
issue thinking that CEs will continue to appear. Somewhat
unfortunately CEs has disappeared through several reboots when I
finally had a time to look at the issue with intention to make a patch
for edac-util.

As far as I could see now, there is no way to poison memory on Intel
to emulate scrubbing walks, because regular poison tests works for
edac-util reporting just fine. If I missed something and scrubbing CE
emulation is possible in some widely unknown way, please let me know.

Thanks.

Please CC me in replies from the list.
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