linux-kernel - Re: [take3 2/4] kevent: AIO, aio

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Message-ID: <20060803171340.GA10698@2ka.mipt.ru>
Date:	Thu, 3 Aug 2006 21:13:40 +0400
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Badari Pulavarty <pbadari@...ibm.com>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	David Miller <davem@...emloft.net>,
	Ulrich Drepper <drepper@...hat.com>,
	netdev <netdev@...r.kernel.org>,
	Zach Brown <zach.brown@...cle.com>
Subject: Re: [take3 2/4] kevent: AIO, aio_sendfile() implementation.

On Thu, Aug 03, 2006 at 10:04:36AM -0700, Badari Pulavarty (pbadari@...ibm.com) wrote:
> Evgeniy Polyakov wrote:
> >AIO, aio_sendfile() implementation.
> >
> >This patch includes asynchronous propagation of file's data into VFS
> >cache and aio_sendfile() implementation.
> >Network aio_sendfile() works lazily - it asynchronously populates pages
> >into the VFS cache (which can be used for various tricks with adaptive
> >readahead) and then uses usual ->sendfile() callback.
> >
> >...
> >--- /dev/null
> >+++ b/kernel/kevent/kevent_aio.c
> >@@ -0,0 +1,584 @@
> >+/*
> >+ * 	kevent_aio.c
> >+ * 
> >  
> Since this is *almost* same as mpage.c code, wondering if its possible 
> to make common
> generic/helper routines in mpage.c and use it here ?

Yes, as I mentioned in mail to Christoph, I did it just to separate
kevent as much as possible (so I introduced ->get_block() based
approach). It can be safely moved into mpage code and used from more
clear callback like ->readpage().
Since this AIO code was decided to be postponed for a while, I'm not
updating it (just make sure that it compiles with new changes), since
overall design of AIO changes (if any) is not 100% completed.

> Thanks,
> Badari

-- 
	Evgeniy Polyakov
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