From: Alexander Viro <viro@math.psu.edu>
To: linux-kernel@vger.kernel.org
Cc: Linus Torvalds <torvalds@transmeta.com>,
Richard Gooch <rgooch@ras.ucalgary.ca>
Subject: Re: more devfs fun (Piled Higher and Deeper)
Date: Sat, 27 Oct 2001 17:01:24 -0400 (EDT) [thread overview]
Message-ID: <Pine.GSO.4.21.0110271657210.21545-100000@weyl.math.psu.edu> (raw)
In-Reply-To: <Pine.GSO.4.21.0110271536190.21545-100000@weyl.math.psu.edu>
On Sat, 27 Oct 2001, Alexander Viro wrote:
> devfs_rmdir() checks that directory is empty. Then it calls
> devfsd_notify_one(), which can block. Then it marks the entry
> unregistered and reports success.
>
> Guess what will happen if devfs_register() will happen at that
> moment...
Ugh... My apologies - race here is a bit different. Namely,
devfs_register() find a directory, starts creating a child,
blocks in kmalloc(), _then_ entire devfs_rmdir() happens and
devfs_register() merrily inserts a new child into dead directory.
next prev parent reply other threads:[~2001-10-27 21:07 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-27 15:00 Poor floppy performance in kernel 2.4.10 Alain Knaff
2001-10-27 15:15 ` Alexander Viro
2001-10-27 17:12 ` Alain Knaff
2001-10-27 17:42 ` Alexander Viro
2001-10-27 18:00 ` Alain Knaff
2001-10-27 18:13 ` Alexander Viro
2001-10-27 18:26 ` Alexander Viro
2001-10-27 19:02 ` more devfs fun Alexander Viro
2001-10-27 19:16 ` Alexander Viro
2001-10-27 19:50 ` more devfs fun (Piled Higher and Deeper) Alexander Viro
2001-10-27 20:06 ` Alexander Viro
2001-10-27 21:09 ` Ryan Cumming
2001-10-27 21:22 ` Alexander Viro
2001-10-28 1:00 ` Rik van Riel
2001-10-28 8:45 ` Richard Gooch
2001-10-28 9:54 ` Alexander Viro
2001-10-28 12:27 ` Roman Zippel
2001-10-28 13:16 ` Alexander Viro
2001-10-28 22:31 ` Richard Gooch
2001-10-28 23:11 ` Alexander Viro
2001-10-27 21:01 ` Alexander Viro [this message]
2001-11-06 6:35 ` Richard Gooch
2001-11-06 7:10 ` Alexander Viro
2001-11-06 7:14 ` Richard Gooch
2001-11-06 7:17 ` Alexander Viro
2001-11-06 20:14 ` Richard Gooch
2001-10-28 10:06 ` Lorenzo Allegrucci
2001-11-06 5:21 ` Richard Gooch
2001-11-06 5:17 ` more devfs fun Richard Gooch
2001-11-06 5:06 ` Richard Gooch
2001-11-06 7:01 ` Poor floppy performance in kernel 2.4.10 Richard Gooch
2001-11-06 7:03 ` Alexander Viro
2001-12-09 5:38 ` Devfs races with block devices Richard Gooch
2001-11-06 7:19 ` Poor floppy performance in kernel 2.4.10 Richard Gooch
2001-11-06 7:22 ` Alexander Viro
2001-10-27 19:13 ` Alain Knaff
2001-10-27 19:19 ` Alexander Viro
2001-10-27 19:26 ` Alain Knaff
2001-10-28 20:40 ` Alain Knaff
2001-10-28 20:57 ` Peter T. Breuer
2001-10-29 5:38 ` Alain Knaff
2001-10-29 6:07 ` Alexander Viro
2001-10-29 6:34 ` Alain Knaff
2001-10-28 21:42 ` Alexander Viro
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