From: Nathan Lynch <ntl@pobox.com>
To: Jeff Moyer <jmoyer@redhat.com>
Cc: linux-kernel@vger.kernel.org,
containers@lists.linux-foundation.org,
Oren Laadan <orenl@cs.columbia.edu>,
linux-aio@kvack.org
Subject: Re: [PATCH 02/10] Introduce mm_has_pending_aio() helper
Date: Tue, 01 Mar 2011 10:04:24 -0600 [thread overview]
Message-ID: <1298995464.461.9.camel@tp-t61> (raw)
In-Reply-To: <x494o7mrgrh.fsf@segfault.boston.devel.redhat.com>
On Tue, 2011-03-01 at 10:40 -0500, Jeff Moyer wrote:
>
> ntl@pobox.com writes:
>
> > From: Nathan Lynch <ntl@pobox.com>
> >
> > Support for AIO is on the to-do list, but until that is implemented,
> > checkpoint will have to fail if a mm_struct has outstanding AIO
> > contexts. Add a mm_has_pending_aio() helper function for this
> > purpose.
>
> Just because a process has an io context, doesn't mean that the process
> has active outstanding requests. So, is this really what you wanted to
> test?
As a temporary measure, yeah. We haven't settled on code to
record/restore the io context objects themselves, so we do want to bail
if we encounter any. I realize now the name of the function doesn't
actually express this well. Will try to come up with something better
for the next round.
Thanks!
next prev parent reply other threads:[~2011-03-01 16:04 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-28 23:40 [RFC 00/10] container-based checkpoint/restart prototype ntl
2011-02-28 23:40 ` [PATCH 01/10] Make exec_mmap extern ntl
2011-04-03 16:56 ` Serge E. Hallyn
2011-02-28 23:40 ` [PATCH 02/10] Introduce mm_has_pending_aio() helper ntl
2011-03-01 15:40 ` Jeff Moyer
2011-03-01 16:04 ` Nathan Lynch [this message]
2011-02-28 23:40 ` [PATCH 03/10] Introduce has_locks_with_owner() helper ntl
2011-04-03 18:55 ` Serge E. Hallyn
2011-02-28 23:40 ` [PATCH 04/10] Introduce vfs_fcntl() helper ntl
2011-04-03 18:57 ` Serge E. Hallyn
2011-02-28 23:40 ` [PATCH 05/10] Core checkpoint/restart support code ntl
2011-04-03 19:03 ` Serge E. Hallyn
2011-04-04 15:00 ` Nathan Lynch
2011-04-04 15:10 ` Serge E. Hallyn
2011-04-04 15:40 ` Nathan Lynch
2011-04-04 16:27 ` Serge E. Hallyn
2011-04-04 17:32 ` Oren Laadan
2011-04-04 21:43 ` Nathan Lynch
2011-04-04 22:03 ` Serge E. Hallyn
2011-04-04 23:42 ` Dan Smith
2011-04-05 2:17 ` Serge E. Hallyn
2011-04-05 19:18 ` Nathan Lynch
2011-04-04 22:29 ` Matt Helsley
2011-04-04 17:41 ` Andrew Morton
2011-04-04 18:51 ` Serge E. Hallyn
2011-04-04 19:42 ` Andrew Morton
2011-04-04 20:29 ` Serge E. Hallyn
2011-04-04 21:55 ` Matt Helsley
2011-04-04 23:15 ` Andrew Morton
2011-04-04 23:16 ` Valdis.Kletnieks
2011-04-04 23:43 ` Matt Helsley
2011-04-04 22:11 ` Serge E. Hallyn
2011-04-04 22:53 ` Serge E. Hallyn
2011-04-04 21:20 ` Nathan Lynch
2011-04-04 21:53 ` Serge E. Hallyn
2011-02-28 23:40 ` [PATCH 06/10] Checkpoint/restart mm support ntl
2011-02-28 23:40 ` [PATCH 07/10] Checkpoint/restart vfs support ntl
2011-02-28 23:40 ` [PATCH 08/10] Add generic '->checkpoint' f_op to ext filesystems ntl
2011-02-28 23:40 ` [PATCH 09/10] Add generic '->checkpoint()' f_op to simple char devices ntl
2011-02-28 23:40 ` [PATCH 10/10] x86_32 support for checkpoint/restart ntl
2011-03-01 1:08 ` [RFC 00/10] container-based checkpoint/restart prototype Nathan Lynch
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