> > And if you mean reads... Good luck propagating the originator
> > information.
>
> Isn't it the case that for most of the filesystem
> reads the current process is the one that is the
> originator of the request ?
Not true for metadata (consider the access to indirect blocks done by
pageout, for one thing). Besides, even for data it's wide open to abuse -
it doesn't take much to trick another process into populating the caches
for you.
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