Re: [fuse-devel] fuse and libaio

[Goswin v. B. <gos...@we...>]

Miklos Szeredi <mi...@sz...> writes:

> On Wed, 10 Nov 2010, Goswin von Brederlow wrote:
>> 
>>     struct fuse_chan *tmpch = fs->ch;
>>     res = fuse_chan_recv(&tmpch, buf, size);
>>     if (res > 0) {
>>         fuse_session_process(fs->se, buf, res, tmpch);
>
> Those two are superseded by fuse_session_receive_buf() and
> fuse_session_process_buf().  The necessary change in the event loop is
> minimal (see fuse_loop*.c).
>
> Thaks,
> Miklos

I've been thinking about this. The reason I use my own loop is twofold:

1) I need the buffer to be specially aligned for libaio.

With splicing that reason goes away. The write() callback gets the
pipe and can tee(2) that into a page aligned buffer. No more need to
align the fuse buffer.

2) I need to only process pending requests (may not block) and then have
to go back to my own select().

That leaves reason 1. It would be nice to have a non-blocking version of
the main loop. It could even just be a callback that is called after
processing each request. The callback could then only return when there
is another request pending.

Or am I missing something that is already there?

MfG
        Goswin