> Wouldn't this mean we could end up with an LRU cache full of
> unfreeable pages?
>
> Then we would scan the LRU cache and apply pressure on all of
> the filesystems, but then the filesystem could decide it wants
> to flush *other* pages from the ones we have on the LRU queue.
So we get pages, although not the ones expected.
> This could get particularly nasty when we have a VM with
> active / inactive / scavenge lists... (like what I'm working
> on now)
Because the system would waste time try to free the same pages over and
over?
The fs is asked to free page A but frees page B instead. Would updating
page A's age information with the info from B help? After all, the
VM system didn't ask for B and won't do that for a while.
Helge Hafting
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This archive was generated by hypermail 2b29 : Thu Jun 15 2000 - 21:00:17 EST