On Sep 14 2007 14:45, Tomas M wrote:
>> > Do you know are there (or are not there) any difference at performance
>> > between kmalloc and vmalloc?
>
> This guy here tested kmalloc versus vmalloc.
> http://www.uwsg.indiana.edu/hypermail/linux/kernel/0405.1/0559.html
>
> His result: for runtime performance vmalloc'ated memory doesn't appear to
> perform worse than kmalloc'ed.
Nono. Reading and writing to said memory should have exactly the same
speed. It is just in vmalloc and vfree that may take a bit more time
while collecting enough single pages to satisfy the request.
> But that's just one single result I found on google.
>
> What does aufs do more often? 'allocate' the memory, or 'use' the allocated
> memory?
Jan
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