On Sat, 3 Feb 2007, Christoph Hellwig wrote:
> This patch seems to not handle the cases where more than one process mlocks
> a page and you really need a pincount in the page to not release it before
> all processes have munlock it or died. I did a similar patch a while
> ago and tried to handle it by overloading the lru lists pointers with
> a pincount, but at some point I gave up because I couldn't get that part
> right.
It doees handle that case. Before PageMlocked is cleared for a page we
check for vmas referencing the page that have VM_LOCKED set. That logic
makes the patch so big.
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