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From: Christoph Hellwig <hch@infradead.org>
To: Jamie Lokier <jamie@shareable.org>
Cc: Linus Torvalds <torvalds@osdl.org>,
	viro@parcelfarce.linux.theplanet.co.uk,
	David Woodhouse <dwmw2@infradead.org>,
	Martin Schwidefsky <schwidefsky@de.ibm.com>,
	Andrew Morton <akpm@osdl.org>, Carsten Otte <cotte@de.ibm.com>,
	Carsten Otte <cotte@freenet.de>,
	linux-fsdevel@vger.kernel.org, sct@redhat.com,
	Dave Kleikamp <shaggy@austin.ibm.com>
Subject: Re: [PATCH] ext3 [linux-2.6.2.]: accessing already freed inodes when under memory pressure
Date: Fri, 2 Apr 2004 21:59:35 +0100	[thread overview]
Message-ID: <20040402215935.A7990@infradead.org> (raw)
In-Reply-To: <20040402204057.GD653@mail.shareable.org>; from jamie@shareable.org on Fri, Apr 02, 2004 at 09:40:57PM +0100

On Fri, Apr 02, 2004 at 09:40:57PM +0100, Jamie Lokier wrote:
> Then there are programs such as optimised Make and cacheing systems
> and servers which use dnotify.  dnotify is reliable for single-linked
> files, and when there are multiple links, it's still reliable if you
> discover all the st_nlink paths to a file.  However, it isn't reliable
> if there are any bind mounts, because you don't know whether you have
> all paths to a file (without grubbing inside /proc/mounts, and that
> has race conditions anyway).

bind mounts aside how are these programs supposed to work with multiple
mounts of the same filesystem at different mountpoints, possibly in
totally different namespaces?  In short everything using dnotify is buggy
anyway..


  reply	other threads:[~2004-04-02 20:59 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-03-30 11:57 [PATCH] ext3 [linux-2.6.2.]: accessing already freed inodes when under memory pressure Martin Schwidefsky
2004-03-30 13:39 ` David Woodhouse
2004-03-30 14:16   ` Matthew Wilcox
2004-03-30 15:51   ` Linus Torvalds
2004-04-02 16:12     ` viro
2004-04-02 18:01       ` viro
2004-04-02 18:52         ` Linus Torvalds
2004-04-02 19:02           ` Linus Torvalds
2004-04-02 19:10             ` viro
2004-04-02 19:07           ` viro
2004-04-02 20:23             ` viro
2004-04-02 22:40               ` Trond Myklebust
2004-04-02 23:06                 ` viro
2004-04-02 23:23                   ` Trond Myklebust
2004-04-03  0:53                     ` Neil Brown
2004-04-02 23:19                 ` Trond Myklebust
2004-04-02 19:17           ` Jamie Lokier
2004-04-02 19:25             ` viro
2004-04-02 19:32             ` Linus Torvalds
2004-04-02 19:37               ` viro
2004-04-02 19:45                 ` Linus Torvalds
2004-04-02 20:08                   ` viro
2004-04-02 20:40               ` Jamie Lokier
2004-04-02 20:59                 ` Christoph Hellwig [this message]
2004-04-02 21:09                   ` viro
2004-04-02 23:42                   ` Jamie Lokier
2004-04-02 21:08                 ` viro
2004-04-03  0:39                   ` Jamie Lokier
2004-04-05 14:07                   ` Stephen C. Tweedie
2004-03-30 15:07 ` Linus Torvalds
2004-04-02 16:14   ` viro
  -- strict thread matches above, loose matches on Subject: below --
2004-03-30 15:13 Martin Schwidefsky
2004-03-29 19:07 Martin Schwidefsky
2004-03-29 20:11 ` Linus Torvalds
2004-03-29 20:29   ` Dave Kleikamp
2004-02-19 18:00 Martin Schwidefsky
2004-02-19 12:21 Carsten Otte
2004-02-19 16:53 ` Linus Torvalds
2004-02-19 17:39   ` Stephen C. Tweedie
2004-02-19 18:49     ` Andrew Morton
2004-02-19 20:28       ` Carsten Otte
2004-02-19 20:26         ` viro
2004-02-19 20:35           ` Carsten Otte
2004-02-19 20:14     ` Carsten Otte
2004-02-20  3:41       ` Andrew Morton
2004-02-19 20:19   ` Carsten Otte
     [not found] ` <20040220164325.659c4e45.akpm@osdl.org>
     [not found]   ` <200402241338.57855.cotte@freenet.de>
2004-02-24 22:55     ` Andrew Morton

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