linux-kernel - Re: -mm merge plans for 2.6.21

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Message-ID: <20070209111010.47e99c17@frecb000686.frec.bull.fr>
Date:	Fri, 9 Feb 2007 11:10:10 +0100
From:	Sébastien Dugué <sebastien.dugue@...l.net>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	"Bharata B Rao" <bharata.rao@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: -mm merge plans for 2.6.21

On Fri, 9 Feb 2007 01:05:57 -0800 Andrew Morton <akpm@...ux-foundation.org> wrote:

> On Fri, 9 Feb 2007 09:26:11 +0100 Sébastien Dugué <sebastien.dugue@...l.net> wrote:
> 
> > On Fri, 9 Feb 2007 11:02:28 +0530 "Bharata B Rao" <bharata.rao@...il.com> wrote:
> > 
> > > Andrew,
> > > 
> > > On 2/9/07, Andrew Morton <akpm@...ux-foundation.org> wrote:
> > > > fsaio-add-a-wait-queue-arg-to-the-wait_bit-action-routine.patch
> > > > fsaio-add-a-wait-queue-arg-to-the-wait_bit-action-routine-gfs2-fix.patch
> > > > fsaio-rename-__lock_page-to-lock_page_blocking.patch
> > > > fsaio-interfaces-to-initialize-and-to-test-a-wait-bit-key.patch
> > > > fsaio-add-a-default-io-wait-bit-field-in-task-struct.patch
> > > > fsaio-enable-wait-bit-based-filtered-wakeups-to-work-for-aio.patch
> > > > fsaio-enable-wait-bit-based-filtered-wakeups-to-work-for-aio-fix.patch
> > > > fsaio-enable-wait-bit-based-filtered-wakeups-to-work-for-aio-fix-sparse-fix.patch
> > > > fsaio-enable-asynchronous-wait-page-and-lock-page.patch
> > > > fsaio-filesystem-aio-read.patch
> > > > fsaio-aio-o_sync-filesystem-write.patch
> > > >
> > > >  Will wait to see what happens with febrils.
> > > >
> > > > aio-is-unlikely.patch
> > > >
> > > >  Will merge.
> > > >
> > > > rework-compat_sys_io_submit.patch
> > > > fix-aioh-includes.patch
> > > > fix-access_ok-checks.patch
> > > > make-good_sigevent-non-static.patch
> > > > make-good_sigevent-non-static-fix.patch
> > > > make-__sigqueue_free-and.patch
> > > > aio-completion-signal-notification.patch
> > > > aio-completion-signal-notification-fix.patch
> > > > aio-completion-signal-notification-fixes-and-cleanups.patch
> > > > aio-completion-signal-notification-small-cleanup.patch
> > > > add-listio-syscall-support.patch
> > > >
> > > >  I guess these are dependent upon fsaio.
> > > 
> > > No. AIO completion signal notification patches and listio patch work
> > > independently of fsaio patches. Just that for buffered AIO case, the
> > > fsaio patches will make the behaviour truly asynchronous.
> > > 
> > > Regards,
> > > Bharata.
> > 
> >   I concur.
> > 
> 
> But is the proposed listio implementation still relevant if we go and add
> the async syscalls? 

  I think the listio syscall could be emulated in userspace using async
syscalls.

  Even more, the whole POSIX AIO functions could benefit from this, rendering
aio.c obsolete.

  Sébastien.
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