Messages in this thread | | | From | "Brown, Len" <> | Date | Mon, 9 Feb 2009 10:00:10 -0700 | Subject | RE: patch acpi-remove-locking-from-pm1x_sts-register-reads.patch added to 2.6.28-stable tree |
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>> why is this -stable material? >> this is a performance improvement.... > >It is, and not a bugfix? If so, I'll drop it.
yes, removing the un-necessary locking it is a scaling performance improvement.
The code has been this way for years. The reason we noticed this issue recently is because of the emergence of systems that simultaneously have many threads and also have deep C-states.
In 2.6.30 we plan larger improvements in this area.
cheers, -Len
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