Re: What's the point to keep mmaped objectfile opened?

[Andy Wingo]

On Tue 13 Dec 2011 14:43, address@hidden writes:

> -[ Tue, Dec 13, 2011 at 01:42:35PM +0100, Andy Wingo ]----
>> If you close the fd, isn't the memory unmapped?  Isn't that a bad thing?
>> 
>> Maybe I was just under a big misconception here :)
>
> That's a common misconception. The mapping of VM space to disk storage
> is unrelated to the file descriptor set (or any program would have at
> least a file descriptor opened for itself, since any program is mapped
> into memory).
> Compare for instance cat /proc/1/maps with ls -l /proc/1/fd.
> As I said, the attached patch, which do closes the fd, actually works
> (ie make check and my personal program works). So the memory is clearly
> not unmapped :-)

I applied your patch.  Thanks very much for the patch, and for the
education :-)

Cheers,

Andy
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