Andres Salomon wrote:
On Mon, 24 Sep 2007 16:51:07 -0400
Bernardo Innocenti [EMAIL PROTECTED] wrote:
Cool! Andrew picked up the patch I liked.
Andres, how about adding it to olpc-2.6 too? Along with the
latest Memphis patch, it would give use us invaluable stats
for those trying to reduce memory usage.
Is it useful for the sugar folks' memory donut? I'm certainly not opposed
to including the patch (though I'd want to look over the lkml thread before
committing), if people find it useful.
PSS is basically the same measure we're currently calculating (a
little more accurate in some ways, a little less in others). Having the
kernel calculate PSS would let us draw the ring faster (which would be
good), but wouldn't affect the accuracy.
The biggest problem the ring has right now is that it doesn't take into
account the fact that code pages can be swapped back out to disk to
create more RAM, and so it needs to count inactive pages differently
from active pages if we want the free-space wedge in the donut to be an
accurate estimation of the user's ability to launch another activity.
AFAIK the PSS kernel patch doesn't help with this.
-- Dan
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