> Thanks, I appreciate all this work. Not allowing inactive pages to > shrink the ARC sounds great as an option. I would be willing to bet > that allowing inactive pages to shrink the arc would be far less > detrimental to most people who aren't running a constant busy file > server load, and its definitely important to try to protect untuned > boxes. Allowing NFS to use ARC buffers might be one solution to that. > Do you have any suggestions for increasing the amount of memory ARC > can use? I've had difficulty increasing kmem past a few gigs on any > of my recent builds (all past where kmem was changed so it could be > more than ~2g) because at some point the kernel would stop booting. > If I increase them too far, a few lines of the booting kernel would > print, followed by a long stream of page fault panics or something > with a sudden reboot. With the recent change allowing the use of > direct mem, the ARC could easily use ample memory except it turned > out not to be stable. As of r192216 that should not be a probably any more. The maximum kmem is now 512GB. It will be at least a year or two before anyone bumps his head against that.Received on Tue May 19 2009 - 00:03:46 UTC
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