Re: What is rw_vm

[Arjan van de Ven <arjan@xxxxxxxxxxxxx>]

On Fri, 2005-01-07 at 15:39 +0100, Olivier Crameri wrote:
> Hi,
> 
> I'm a newbie of kernelnewbies, so please don't mind if my question is 
> inappropriate.
> 
> I'm working on a user level library that makes intensive use of the 
> kernel. Because my library doesn't give me the performances I expected, 
> I'm using oprofile to understand what's happening in the kernel.
> 
> The symbol rw_vm is recurring and seems to be consuming lots of time. 
> As I don't know what rw_vm does, and I can't find this symbol in the 
> sources, I can't understand what's happening in the system.
> 
> Could someone explain me what rw_vm is ? And maybe tell me to what part 
> of the kernel code it's related ?
> 
> My system runs a 2.6.9 kernel with smp enabled.

rw_vm is a fedora specific routine that basically is the workhorse for
copy_from_user and copy_to_user and friends...



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