From: Hugh Dickins <hugh@veritas.com>
To: Erez Zadok <ezk@cs.sunysb.edu>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>,
Ryan Finnie <ryan@finnie.org>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
cjwatson@ubuntu.com, linux-mm@kvack.org, neilb@suse.de
Subject: Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userland
Date: Thu, 25 Oct 2007 19:23:46 +0100 (BST) [thread overview]
Message-ID: <Pine.LNX.4.64.0710251913150.21612@blonde.wat.veritas.com> (raw)
In-Reply-To: <200710251644.l9PGilSK021536@agora.fsl.cs.sunysb.edu>
On Thu, 25 Oct 2007, Erez Zadok wrote:
>
> On a related note, I would just love to get rid of calling the lower
> ->writepage in unionfs b/c I can't even tell if I have a lower page to use
> all the time. I'd prefer to call vfs_write() if I can, but I'll need a
> struct file, or at least a dentry.
Why do you want to do that? You gave a good reason why it's easier
for ecryptfs, but I doubt it's robust. The higher the level you
choose to use, the harder to guarantee it won't deadlock.
Or that's my gut feeling anyway. It's several years since I've
thought about such issues: just because I came into this knowing
about shmem_writepage, is perhaps not a good reason to choose me
as advisor!
Hugh
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next prev parent reply other threads:[~2007-10-25 18:23 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200710071920.l97JKJX5018871@agora.fsl.cs.sunysb.edu>
2007-10-11 21:47 ` Andrew Morton
2007-10-11 22:12 ` Ryan Finnie
2007-10-12 0:38 ` Hugh Dickins
2007-10-12 21:45 ` Pekka Enberg
2007-10-14 8:44 ` Hugh Dickins
2007-10-14 17:09 ` Pekka Enberg
2007-10-14 17:23 ` Erez Zadok
2007-10-14 17:50 ` Pekka J Enberg
2007-10-14 22:32 ` Erez Zadok
2007-10-15 11:47 ` Pekka Enberg
2007-10-16 18:02 ` Erez Zadok
2007-10-22 20:16 ` Hugh Dickins
2007-10-22 20:48 ` Pekka Enberg
2007-10-25 15:36 ` Hugh Dickins
2007-10-25 16:44 ` Erez Zadok
2007-10-25 18:23 ` Hugh Dickins [this message]
2007-10-26 2:00 ` Neil Brown
2007-10-26 8:09 ` Pekka Enberg
2007-10-26 11:26 ` Hugh Dickins
2007-10-26 8:05 ` Pekka Enberg
2007-10-22 21:04 ` Erez Zadok
2007-10-25 16:40 ` Hugh Dickins
2007-10-24 21:02 ` [PATCH] fix tmpfs BUG and AOP_WRITEPAGE_ACTIVATE Hugh Dickins
2007-10-24 21:08 ` Andrew Morton
2007-10-24 21:37 ` [PATCH+comment] " Hugh Dickins
2007-10-25 5:37 ` Pekka Enberg
2007-10-25 6:30 ` Hugh Dickins
2007-10-25 7:24 ` Pekka Enberg
2007-10-25 16:01 ` Erez Zadok
2007-10-25 20:51 ` H. Peter Anvin
2007-10-22 20:01 ` msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userland Hugh Dickins
2007-10-22 20:40 ` Pekka Enberg
2007-10-22 19:42 ` Hugh Dickins
2007-10-22 21:38 ` Erez Zadok
2007-10-25 18:03 ` Hugh Dickins
2007-10-27 20:47 ` Erez Zadok
2007-10-28 20:23 ` Erez Zadok
2007-10-29 20:33 ` Hugh Dickins
2007-10-31 23:53 ` Erez Zadok
2007-11-05 15:40 ` Hugh Dickins
2007-11-05 16:38 ` Dave Hansen
2007-11-05 18:57 ` Hugh Dickins
2007-11-09 2:47 ` Erez Zadok
2007-11-09 6:05 ` Erez Zadok
2007-11-12 5:41 ` Hugh Dickins
2007-11-12 17:01 ` Hugh Dickins
2007-11-13 10:18 ` Erez Zadok
2007-11-17 21:24 ` Hugh Dickins
2007-11-20 1:30 ` Erez Zadok
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