tree 136f8172bfa173c42f372b4d1abb611182ecaad2
parent b18dfd05f98de9fae5258299bcc2bfcf394650c4
author Nils Carlson <nils.carlson@ludd.ltu.se> 1260924462 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1260976812 -0800

edac: i5100 add scrubbing

Addscrubbing to the i5100 chipset.  The i5100 chipset only supports one
scrubbing rate, which is not constant but dependent on memory load.  The
rate returned by this driver is an estimate based on some experimentation,
but is substantially closer to the truth than the speed supplied in the
documentation.

Also, scrubbing is done once, and then a done-bit is set.  This means that
to accomplish continuous scrubbing a re-enabling mechanism must be used.
I have created the simplest possible such mechanism in the form of a
work-queue which will check every five minutes.  This interval is quite
arbitrary but should be sufficient for all sizes of system memory.

Signed-off-by: Nils Carlson <nils.carlson@ludd.ltu.se>
Signed-off-by: Doug Thompson <dougthompson@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>