From: Andrew Morton <akpm@osdl.org>
To: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: shaggy@austin.ibm.com, dhowells@redhat.com,
phillip@hellewell.homeip.net, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org, viro@ftp.linux.org.uk,
mike@halcrow.us, mhalcrow@us.ibm.com, mcthomps@us.ibm.com,
toml@us.ibm.com, yoder1@us.ibm.com, jmorris@namei.org,
sct@redhat.com, ezk@cs.sunysb.edu
Subject: Re: [PATCH 10/13: eCryptfs] Mmap operations
Date: Fri, 5 May 2006 19:21:48 -0700 [thread overview]
Message-ID: <20060505192148.e2c968b7.akpm@osdl.org> (raw)
In-Reply-To: <1146843528.11271.1.camel@localhost>
On Fri, 05 May 2006 18:38:48 +0300
Pekka Enberg <penberg@cs.helsinki.fi> wrote:
> On Thu, 2006-05-04 at 22:43 +0100, David Howells wrote:
> > > When writing CacheFiles, I noticed that ext3 would occasionally unlock a page
> > > that had neither PG_uptodate nor PG_error set, and so I had to force another
> > > readpage() on it.
>
> On Fri, 2006-05-05 at 10:22 -0500, Dave Kleikamp wrote:
> > I understand this comes from the FiST package. In that code, there is a
> > comment in one of these functions explaining the second read. It would
> > be nice to have that comment in here too:
> >
> > /*
> > * call readpage() again if we returned from wait_on_page with a
> > * page that's not up-to-date; that can happen when a partial
> > * page has a few buffers which are ok, but not the whole
> > * page.
> > */
> >
> > I'm a bit surprised that this could happen.
>
> Me too. How do we know we don't end up the same way for the second read?
>
And why doesn't it cause do_generic_mapping_read() and page_cache_read() to
fail?
This is all raher fishy.
next prev parent reply other threads:[~2006-05-06 2:22 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-04 3:17 [PATCH 0/12: eCryptfs] eCryptfs version 0.1.6 Phillip Hellewell
2006-05-04 3:27 ` [PATCH 1/13: eCryptfs] fs/Makefile and fs/Kconfig Phillip Hellewell
2006-05-04 3:35 ` [PATCH 2/13: eCryptfs] Documentation Phillip Hellewell
2006-05-04 7:32 ` Pavel Machek
2006-05-04 12:11 ` Michael Halcrow
2006-05-04 3:36 ` [PATCH 3/13: eCryptfs] Makefile Phillip Hellewell
2006-05-04 3:37 ` [PATCH 4/13: eCryptfs] Main module functions Phillip Hellewell
2006-05-04 3:37 ` [PATCH 5/13: eCryptfs] Header declarations Phillip Hellewell
2006-05-04 14:51 ` Pekka Enberg
2006-05-04 14:58 ` Artem B. Bityutskiy
2006-05-04 15:22 ` Pekka Enberg
2006-05-04 15:29 ` Artem B. Bityutskiy
2006-05-04 15:08 ` Michael Thompson
2006-05-04 3:38 ` [PATCH 6/13: eCryptfs] Superblock operations Phillip Hellewell
2006-05-04 9:55 ` Pavel Machek
2006-05-04 14:02 ` Michael Thompson
2006-05-04 14:26 ` Pekka Enberg
2006-05-04 14:37 ` Pekka Enberg
2006-05-04 15:00 ` Michael Thompson
2006-05-04 15:12 ` Pekka Enberg
2006-05-04 21:40 ` David Howells
2006-05-05 13:12 ` Dave Kleikamp
2006-05-05 14:03 ` David Howells
2006-05-05 14:34 ` Dave Kleikamp
2006-05-05 14:52 ` David Howells
2006-05-05 16:15 ` Timothy R. Chavez
2006-05-04 3:39 ` [PATCH 7/13: eCryptfs] Dentry operations Phillip Hellewell
2006-05-05 16:46 ` Timothy R. Chavez
2006-05-04 3:39 ` [PATCH 8/13: eCryptfs] File operations Phillip Hellewell
2006-05-04 4:06 ` Eric Dumazet
2006-05-05 18:55 ` Timothy R. Chavez
2006-05-04 3:40 ` [PATCH 9/13: eCryptfs] Inode operations Phillip Hellewell
2006-05-04 3:41 ` [PATCH 10/13: eCryptfs] Mmap operations Phillip Hellewell
2006-05-04 15:13 ` Pekka Enberg
2006-05-04 21:43 ` David Howells
2006-05-05 15:22 ` Dave Kleikamp
2006-05-05 15:38 ` Pekka Enberg
2006-05-06 2:21 ` Andrew Morton [this message]
2006-05-06 16:00 ` Michael Halcrow
2006-05-06 16:42 ` Andrew Morton
2006-05-06 16:57 ` Linus Torvalds
2006-05-04 3:42 ` [PATCH 11/13: eCryptfs] Keystore Phillip Hellewell
2006-05-04 3:42 ` [PATCH 12/13: eCryptfs] Crypto functions Phillip Hellewell
2006-05-04 3:43 ` [PATCH 13/13: eCryptfs] Debug functions Phillip Hellewell
2006-05-04 20:30 ` Randy.Dunlap
2006-05-04 7:28 ` [PATCH 0/12: eCryptfs] eCryptfs version 0.1.6 Pavel Machek
2006-05-04 12:08 ` Michael Halcrow
2006-05-05 9:05 ` Alon Bar-Lev
2006-05-05 16:08 ` Michael Halcrow
-- strict thread matches above, loose matches on Subject: below --
2006-05-13 3:37 [PATCH 0/13: eCryptfs] eCryptfs Patch Set Phillip Hellewell
2006-05-13 3:47 ` [PATCH 10/13: eCryptfs] Mmap operations Phillip Hellewell
2006-06-28 14:16 ` Pekka Enberg
2006-06-28 15:02 ` Michael Halcrow
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