From: Pavel Machek <pavel@ucw.cz>
To: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: Zdenek Kabelac <zdenek.kabelac@gmail.com>,
Christoph Hellwig <hch@lst.de>, "Rafael J. Wysocki" <rjw@sisk.pl>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-mmc@vger.kernel.org, viro@zeniv.linux.org.uk
Subject: Re: Regression in suspend to ram in 2.6.31-rc kernels
Date: Thu, 10 Sep 2009 21:23:54 +0200 [thread overview]
Message-ID: <20090910192354.GD23356@elf.ucw.cz> (raw)
In-Reply-To: <87ljko5k3v.fsf@devron.myhome.or.jp>
On Wed 2009-09-09 22:21:56, OGAWA Hirofumi wrote:
> Pavel Machek <pavel@ucw.cz> writes:
>
> >> It seems
> >>
> >> 1) sync() (probabry "sync" command)
> >> 2) sync as part of suspend sequence
> >> 3) sync_filesystem() by mmc remove event
> >>
> >> I guess the root-cause of the problem would be 3). However, it would not
> >> be easy to fix, at least, we would need to think about what we want to
> >> do for it. So, to workaround it for now, I've made this patch.
> >
> > MMC driver trying to synchronize filesystems looks like ugly layering
> > violation to me. Why are we doing that?
>
> There is no _layering violation_ here. IIRC, mmc just tells card removed
> event to another layer (on some points of view, to tell event can be
> wrong though). The partition (block) layer does it by event.
So what is the problem? Emulating sync when card is already removed
seems little ... interesting?
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2009-09-10 19:23 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-31 11:51 Regression in suspend to ram in 2.6.31-rc kernels Zdenek Kabelac
2009-08-31 19:19 ` Rafael J. Wysocki
2009-09-01 9:34 ` Zdenek Kabelac
2009-09-03 22:29 ` Zdenek Kabelac
2009-09-03 23:23 ` Christoph Hellwig
2009-09-04 0:47 ` OGAWA Hirofumi
2009-09-04 9:13 ` Zdenek Kabelac
2009-09-05 17:22 ` OGAWA Hirofumi
2009-09-05 19:53 ` Zdenek Kabelac
2009-09-05 22:42 ` OGAWA Hirofumi
2009-09-08 8:10 ` Zdenek Kabelac
2009-09-09 13:15 ` OGAWA Hirofumi
2009-09-07 12:51 ` Pavel Machek
2009-09-09 13:21 ` OGAWA Hirofumi
2009-09-10 19:23 ` Pavel Machek [this message]
2009-09-11 6:39 ` OGAWA Hirofumi
2009-09-11 20:09 ` Pavel Machek
2009-09-11 21:14 ` Zdenek Kabelac
2009-09-11 21:32 ` Pavel Machek
2009-09-11 21:45 ` Zdenek Kabelac
2009-09-11 21:51 ` Pavel Machek
2009-09-11 22:22 ` Rafael J. Wysocki
2009-09-14 20:05 ` Pierre Ossman
2009-09-14 20:25 ` Pavel Machek
2009-09-11 22:29 ` Chris Ball
2009-09-11 22:36 ` Rafael J. Wysocki
2009-09-14 8:39 ` Zdenek Kabelac
2009-09-14 19:17 ` Rafael J. Wysocki
2009-09-14 20:27 ` Pavel Machek
2009-09-18 11:15 ` OGAWA Hirofumi
2009-09-18 21:39 ` Rafael J. Wysocki
2009-09-11 22:22 ` Chris Ball
2009-09-11 22:04 ` Rafael J. Wysocki
2009-09-11 22:21 ` Pavel Machek
2009-09-11 22:32 ` Rafael J. Wysocki
2009-09-08 19:06 ` Christoph Hellwig
2009-09-08 19:48 ` Rafael J. Wysocki
2009-09-09 13:52 ` OGAWA Hirofumi
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