X Server: abused or buggy?

Matthieu Herrb matthieu.herrb at laas.fr
Wed Dec 10 11:46:19 PST 2008

Alan Coopersmith wrote:
> Charles Lindsey wrote:
>> However, let us not dismiss this POV too soon. It is usually argued that  
>> an application that suffers from such memory fragmentation should be  
>> restarted occasionally (and, given that the Xserver runs in user space,  
>> unlike in Windoze, this is not impossible, though perhaps inconvenient in  
>> some circumstances).
> We could also investigate using a "slab allocator" approach for things like
> data structures that are a fixed size, to keep them from ending up between
> pixmaps, and hopefully reducing fragmentation that way, but that's also more
> work no one has signed up for.   (I know on Solaris there's a slab allocator
> version of malloc available in libumem, I don't know about libraries for other
> platforms though, or if Xorg would have to write it's own.)

XFree86 used to have one for this purpose. It was one of the 1st victims
of the "X is not an operating system" cleanup.

Matthieu Herrb

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