Re: Question about AIO behavior....

[Christopher Smith <x@xxxxxxxx>]

--On Friday, April 06, 2001 17:52:08 -0700 Christopher Smith <x@xxxxxxxx> 
wrote:
> Okay, I am seeing some behavior from KAIO which doesn't seem entirely
> right to me. If I do a read() on a socket which has no data, it blocks
> until there is some data available. However, if I do an aio_read() on the
> socket, it responds immediately, reading zero data, giving me that error
> code "29" I mentioned previously (aio_return() gives me 0, so it really
> thinks it didn't get any data).
>
> Is this actually correct AIO behavior? I thought AIO was supposed to be
> more of an equivlanet to read().

Okay, I've learned a bit more about what's going on now. It appears that 
the latest patch tries to do a seek if you do a read() on a socket (and 
presumably on a pipe as well). This results in a seek error (error 29).

I'm going to look into patching this myself, but I thought I'd notify the 
group in the event that I was either wrong in my analysis or if someone had 
a fix (or got one done before I did).

--Chris