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    SubjectRe: VFS: file-max limit 50044 reached
    On Mon, Oct 17, 2005 at 06:01:31PM +0200, Eric Dumazet wrote:
    > Linus Torvalds a écrit :
    >
    > >
    > > - post-14: work on making sure rcu callbacks are done in a more timely
    > > manner when the rcu queue gets long. This would involve TIF_RCUPENDING
    > > and whatever else to make sure that we have timely quiescent periods,
    > > and we do the RCU callback tasklet more often if the queue is long.
    > >
    >
    > Absolutely. Keeping a count of (percpu) queued items is basically free if
    > kept in the cache line used by list head, so the 'queue length on this cpu'
    > is a cheap metric.

    Or 'sudden increase in queue length on this cpu' :)

    > A 'realtime refinement' would be to use a different maxbatch limit
    > depending on the caller's priority : Let a softirq thread have a lower
    > batch count than a regular user thread.

    Yes, would be interesting.

    Thanks
    Dipankar
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