Re: Sockets: synchronous I/O

["Jens Kramel" <no@xxxxxxxx>]

I'm doing it inside the kernel because I'm writing a distributed file system 
using the VFS. I guess using a user mode deamon as a proxy for communication 
would lead to a noticeable performance impact in this case, right?

Jens

"Pradeep Padala" <ppadala@xxxxxxxxxxxxxx> wrote in message 
news:42F1007F.8060307@xxxxxxxxxxxxxxxxx
>>>>Tux was a nice experiment, until somebody showed that you can get the
>>>>same performance from userspace by using sendfile(). The performance
>>>>argument no longer holds.
>>>
>>>Agreed, but I believe there are still some gray areas. For example, using 
>>>multiple streams for transfering a file. Yes, this can be done in the 
>>>user mode, probably as effectively, but doing it in the kernel is still 
>>>an interesting thing to do.
>>
>>
>> If you mean "interesting" as in "interesting ways to crash your kernel
>> by minor programming errors", I agree.
>
> My point is don't discourage people just by saying 'don't do this', when 
> there are possible useful scenarios. What's wrong, if someone crashes the 
> kernel, while learning? If nothing else, one would atleast learn a few 
> intricacies of the kernel.
>
> -- 
> Pradeep Padala
> http://ppadala.blogspot.com
>
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> Kernelnewbies: Help each other learn about the Linux kernel.
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>
> 



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