Re: [uml-devel] Re: [PATCH] Fix for annoying problem with hostfs readdir problems.

[BlaisorBlade <blaisorblade_spam@yahoo.it>]

Alle 23:46, giovedì 15 aprile 2004, Oleg Drokin ha scritto:
> Hello!
>
> On Fri, Apr 16, 2004 at 12:03:18AM +0300, Oleg Drokin wrote:
> >    So the annoying problem with readdir not working on hostfs (on 2.6
> > host kernel only for me) was finally hunted to memory allocation
> >    problem during opendir.

I've experienced it too onto 2.6 and someone else had the same problem - but 
that patch is not perfect. Using always vmalloc() instead of kmalloc() is 
wrong - vmalloc is slower, and Linus spoke against vmalloc(); it would also 
slow down everything using malloc().

Probably you should use vmalloc() only if size is > the size limit (if this is 
the problem, as I guess). When you come at free() it is a bit hard, but IIRC 
vmalloc() can return pointers inside a certain, known memory area, right? So 
it is possible to understand what function to call.

Bye
-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729



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