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From: Frederic Weisbecker <fweisbec@gmail.com>
To: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Ingo Molnar <mingo@elte.hu>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Alan Cox <alan@lxorguk.ukuu.org.uk>,
	Andrew Morton <akpm@linux-foundation.org>,
	Greg KH <gregkh@suse.de>, Peter Zijlstra <a.p.zijlstra@chello.nl>,
	linux-kernel@vger.kernel.org
Subject: Re: [GIT PATCH] TTY patches for 2.6.33-git
Date: Sun, 13 Dec 2009 20:20:05 +0100	[thread overview]
Message-ID: <20091213192003.GC7297@nowhere> (raw)
In-Reply-To: <1260731354.2612.14.camel@localhost>

On Sun, Dec 13, 2009 at 02:09:14PM -0500, Trond Myklebust wrote:
> On Sun, 2009-12-13 at 20:04 +0100, Frederic Weisbecker wrote: 
> > In the above cases we have the following comment:
> > 
> > /* Protect inode->i_flock using the BKL */
> > 
> > And really it doesn't seem to protect anything else,
> > fortunately it is acquired in a short path.
> 
> As I said in my reply, this is the tough one, because the BKL protection
> is imposed by the VFS locking scheme used in fs/locks.c.
> 
> There is a similar dependency imposed upon fs/lockd/



Ok.


> > fs/nfs/super.c: unlock_kernel();
> > fs/nfs/super.c: unlock_kernel();
> > 
> > Protect the mount/unmount path, a bit trickier there.
> > 
> > But really that looks way much easier to fix than it was
> > with reiserfs.
> 
> All the other cases you list should be fixed in the GIT PULL request
> that I just put out.
> 


Cool, thanks a lot!


  parent reply	other threads:[~2009-12-13 19:20 UTC|newest]

Thread overview: 100+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-12-11 23:28 [GIT PATCH] TTY patches for 2.6.33-git Greg KH
2009-12-11 23:27 ` [PATCH 01/58] jsm: IRQ handlers doesn't need to have IRQ_DISABLED enabled Greg Kroah-Hartman
2009-12-11 23:27 ` [PATCH 02/58] jsm: Rewriting a bad log message Greg Kroah-Hartman
2009-12-11 23:27 ` [PATCH 03/58] jsm: remove the ch_custom_speed field Greg Kroah-Hartman
2009-12-11 23:27 ` [PATCH 04/58] jsm: removing ch_old_baud field Greg Kroah-Hartman
2009-12-11 23:27 ` [PATCH 05/58] jsm: Remove ch_cpstime field Greg Kroah-Hartman
2009-12-11 23:27 ` [PATCH 06/58] jsm: Removing unused jsm_channel->ch_wopen field Greg Kroah-Hartman
2009-12-11 23:27 ` [PATCH 07/58] jsm: removing the field jsm_board->intr_count Greg Kroah-Hartman
2009-12-11 23:27 ` [PATCH 08/58] jsm: adding EEH handlers Greg Kroah-Hartman
2009-12-11 23:27 ` [PATCH 09/58] tty: const: constify remaining tty_operations Greg Kroah-Hartman
2009-12-11 23:27 ` [PATCH 10/58] tty: esp: remove broken driver Greg Kroah-Hartman
2009-12-11 23:27 ` [PATCH 11/58] tty: istallion: Kill off the BKL ioctl Greg Kroah-Hartman
2009-12-11 23:27 ` [PATCH 12/58] tty: stallion: kill " Greg Kroah-Hartman
2009-12-11 23:27 ` [PATCH 13/58] tty_port: add "tty_port_open" helper Greg Kroah-Hartman
2009-12-11 23:27 ` [PATCH 14/58] tty_port: coding style cleaning pass Greg Kroah-Hartman
2009-12-11 23:27 ` [PATCH 15/58] usb_serial: Use the shutdown() operation Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 16/58] usb_serial: Kill port mutex Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 17/58] opticon: Fix resume logic Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 18/58] serial: fix NULL pointer dereference Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 19/58] serial: cascade needless conditionals Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 20/58] serial, 8250: calculate irqflags bitmask before loop Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 21/58] Serial: pxa: work around Errata #75 Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 22/58] tty: docs: serial/tty, add to ldisc methods Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 23/58] Serial: Do not read IIR in serial8250_start_tx when UART_BUG_TXEN Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 24/58] devpts_get_tty() should validate inode Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 25/58] tty_port: Move hupcl handling Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 26/58] sdio_uart: use tty_port Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 27/58] sdio_uart: Fix oops caused by the previous changeset Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 28/58] sdio_uart: refcount the tty objects Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 29/58] sdio_uart: Move the open lock Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 30/58] tty: sdio_uart: Switch to the open/close helpers Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 31/58] tty: sdio_uart: Fix termios handling Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 32/58] tty: sdio_uart: Style fixes Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 33/58] tty: sdio_uart: add modem functionality Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 34/58] tty: sdio_uart: Fix the locking on "func" for new code Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 35/58] tty: tty_port: Change the buffer allocator locking Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 36/58] tty: riscom8: switch to the tty_port_open API Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 37/58] tty: tty_port: Add IO_ERROR bit handling Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 38/58] tty: tty_port: Move the IO_ERROR clear Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 39/58] tty: stallion: Convert to the tty_port_open/close methods Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 40/58] tty: istallion: tty port open/close methods Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 41/58] tty: tty_port: Add a kref object to the tty port Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 42/58] tty: isicom: switch to the new tty_port_open helper Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 43/58] tty: isicom: sort out the board init logic Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 44/58] tty: mxser: use the tty_port_open method Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 45/58] tty: mxser: Use the new locking rules to fix setserial properly Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 46/58] tty: isicom: fix deadlock on shutdown Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 47/58] tty: moxa: Use more tty_port ops Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 48/58] tty: moxa: rework the locking a bit Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 49/58] tty: moxa: Locking clean up Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 50/58] tty: moxa: Kill off the throttle method Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 51/58] tty: moxa: Fix modem op locking Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 52/58] tty: moxa: Kill the use of lock_kernel Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 53/58] tty: moxa: split open lock Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 54/58] tty: push the BKL down into the handlers a bit Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 55/58] tty: Push the lock down further into the ldisc code Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 56/58] tty: Push the bkl down a bit in the hangup code Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 57/58] tty: Move the leader test in disassociate Greg Kroah-Hartman
2009-12-11 23:28 ` [PATCH 58/58] tty: split the lock up a bit further Greg Kroah-Hartman
2009-12-12  8:46 ` [GIT PATCH] TTY patches for 2.6.33-git Ingo Molnar
2009-12-12  9:39   ` Andrew Morton
2009-12-12 10:06     ` Ingo Molnar
2009-12-12 10:15       ` Ingo Molnar
2009-12-12 10:41         ` Andrew Morton
2009-12-12 10:52           ` Ingo Molnar
2009-12-12 10:10     ` Ingo Molnar
2009-12-12 10:36       ` Andrew Morton
2009-12-12 17:16         ` Linus Torvalds
2009-12-12 17:26           ` Linus Torvalds
2009-12-12 21:42             ` Alan Cox
2009-12-12 21:48               ` Thomas Gleixner
2009-12-12 22:25                 ` Linus Torvalds
2009-12-12 22:31                   ` Thomas Gleixner
2009-12-12 22:21               ` Linus Torvalds
2009-12-12 22:33                 ` Thomas Gleixner
2009-12-12 23:17                   ` Linus Torvalds
2009-12-13  6:58                     ` Ingo Molnar
2009-12-13 11:36                       ` Alan Cox
2009-12-13 12:13                         ` Ingo Molnar
2009-12-13 17:46                       ` Linus Torvalds
2009-12-13 18:17                         ` Ingo Molnar
2009-12-13 18:33                           ` Trond Myklebust
2009-12-13 19:07                             ` Linus Torvalds
2009-12-13 19:17                               ` Trond Myklebust
2009-12-13 19:04                           ` Frederic Weisbecker
2009-12-13 19:09                             ` Trond Myklebust
2009-12-13 19:19                               ` Linus Torvalds
2009-12-13 20:04                                 ` Trond Myklebust
2009-12-13 19:20                               ` Frederic Weisbecker [this message]
2009-12-13 17:55                       ` Arjan van de Ven
2009-12-13 19:16                         ` Frederic Weisbecker
2009-12-14  5:30                           ` Arjan van de Ven
2009-12-14 10:39                             ` Oliver Neukum
2009-12-14 16:02                               ` Arjan van de Ven
2009-12-16  9:15                             ` Arnd Bergmann
2009-12-12 11:02     ` Alan Cox
2009-12-12 22:34       ` Thomas Gleixner
2009-12-12 10:42   ` Alan Cox
2009-12-12 10:42     ` Ingo Molnar
  -- strict thread matches above, loose matches on Subject: below --
2010-03-02 23:09 Greg KH

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