[haiku-development] Re: Entry rename and queries
- From: Alexandre Deckner <alex@xxxxxxxxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Mon, 23 Nov 2009 18:24:48 +0100
Ingo Weinhold wrote:
On a 32 bit machine watching a node (not watched by anyone else) costs 72
bytes of kernel heap. There's a minimal CPU overhead for checking whether an
event for a watched node occurred and some overhead for actually sending a
node monitoring message. Watching a directory's contents is just watching a
single node for a specific event.
The mechanism requires a kernel resource (kernel heap), so a soft limit is
in order to protect the system.
Ok, thanks. So the next question is, does a query already node monitors
it's results (internally) to generate the query update events? Wouldn't
adding another type of event (like B_ENTRY_MOVED) for queries make sense?
Regards,
Alex
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