From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Hillf Danton <hdanton@sina.com>
Cc: Alan Stern <stern@rowland.harvard.edu>,
Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
"Rafael J. Wysocki" <rafael@kernel.org>,
linux-mm@kvack.org, LKML <linux-kernel@vger.kernel.org>,
USB list <linux-usb@vger.kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: Converting dev->mutex into dev->spinlock ?
Date: Mon, 6 Feb 2023 07:48:03 +0100 [thread overview]
Message-ID: <Y+Cio48RvJe9Y2cv@kroah.com> (raw)
In-Reply-To: <20230206064305.1838-1-hdanton@sina.com>
On Mon, Feb 06, 2023 at 02:43:05PM +0800, Hillf Danton wrote:
> On Mon, 6 Feb 2023 06:17:03 +0100 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > On Mon, Feb 06, 2023 at 10:56:29AM +0800, Hillf Danton wrote:
> > > On Sun, 5 Feb 2023 11:46:06 -0500 Alan Stern <stern@rowland.harvard.edu>
> > > >
> > > > And by the way, by disabling lockdep validation I am declaraing that
> > > > enabling it would cause an overwhelming number of false positives,
> > >
> > > Could you share 5 false positives you see upstream to help understand how
> > > it is useless?
> >
> > Please see this other email in this thread:
> > https://lore.kernel.org/r/Y98FLlr7jkiFlV0k@rowland.harvard.edu
>
> What lockdep warnings? Specific examples, please.
Remove the one line of code, as per the patch in this thread, and boot
with lockdep enabled and see what happens if you wish to see them
yourself.
thanks,
greg k-h
next prev parent reply other threads:[~2023-02-06 6:48 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-04 13:32 Converting dev->mutex into dev->spinlock ? Tetsuo Handa
2023-02-04 13:47 ` Greg Kroah-Hartman
2023-02-04 14:21 ` Tetsuo Handa
2023-02-04 14:34 ` Greg Kroah-Hartman
2023-02-04 15:16 ` Tetsuo Handa
2023-02-04 15:34 ` Alan Stern
2023-02-04 16:12 ` Tetsuo Handa
2023-02-04 16:27 ` Alan Stern
2023-02-04 17:09 ` Tetsuo Handa
2023-02-04 20:01 ` Alan Stern
2023-02-04 20:14 ` Linus Torvalds
2023-02-05 1:23 ` Alan Stern
2023-02-06 14:13 ` Tetsuo Handa
2023-02-06 15:45 ` Alan Stern
2023-02-07 13:07 ` Tetsuo Handa
2023-02-07 17:46 ` Alan Stern
2023-02-07 22:17 ` Tetsuo Handa
2023-02-08 0:34 ` Alan Stern
[not found] ` <20230208080739.1649-1-hdanton@sina.com>
2023-02-08 10:30 ` [PATCH] drivers/core: Replace lockdep_set_novalidate_class() with unique class keys Tetsuo Handa
2023-02-08 15:07 ` Alan Stern
2023-02-09 0:22 ` Tetsuo Handa
2023-02-09 0:46 ` Linus Torvalds
2023-02-09 1:50 ` Tetsuo Handa
2023-02-09 2:26 ` Alan Stern
2023-02-11 2:04 ` Tetsuo Handa
2023-02-11 21:41 ` [PATCH RFC] " Alan Stern
2023-02-11 21:51 ` Linus Torvalds
2023-02-11 23:06 ` Kent Overstreet
2023-02-11 23:08 ` Kent Overstreet
2023-02-11 23:24 ` Kent Overstreet
2023-02-12 2:40 ` Alan Stern
2023-02-12 2:46 ` Kent Overstreet
2023-02-12 3:03 ` Alan Stern
2023-02-12 3:10 ` Kent Overstreet
2023-02-12 15:23 ` Alan Stern
2023-02-12 19:14 ` Kent Overstreet
2023-02-12 20:19 ` Alan Stern
2023-02-12 20:51 ` Kent Overstreet
2023-02-13 1:23 ` Alan Stern
2023-02-13 2:21 ` Kent Overstreet
2023-02-13 15:25 ` Alan Stern
2023-02-13 9:29 ` Peter Zijlstra
2023-02-13 9:27 ` Peter Zijlstra
2023-02-13 15:28 ` Alan Stern
2023-02-13 16:36 ` Peter Zijlstra
2023-02-13 9:24 ` Peter Zijlstra
2023-02-13 15:25 ` Alan Stern
2023-02-13 16:29 ` Peter Zijlstra
2023-02-14 1:51 ` Boqun Feng
2023-02-14 1:53 ` Boqun Feng
2023-02-14 2:03 ` Alan Stern
2023-02-14 2:09 ` Boqun Feng
[not found] ` <20230214052733.3354-1-hdanton@sina.com>
2023-02-14 5:55 ` Boqun Feng
2023-02-14 10:48 ` Peter Zijlstra
2023-02-14 16:22 ` Boqun Feng
2023-02-15 10:45 ` Peter Zijlstra
2023-02-20 17:32 ` Boqun Feng
2023-02-13 18:46 ` Kent Overstreet
2023-02-14 11:05 ` Peter Zijlstra
2023-02-14 20:05 ` Alan Stern
2023-02-15 10:33 ` Peter Zijlstra
2023-02-14 20:16 ` Kent Overstreet
[not found] ` <20230212013220.2678-1-hdanton@sina.com>
2023-02-12 1:52 ` Kent Overstreet
2023-02-13 9:49 ` Peter Zijlstra
2023-02-13 16:18 ` Alan Stern
2023-02-13 17:51 ` Greg Kroah-Hartman
2023-02-13 18:05 ` Alan Stern
2023-02-05 1:31 ` Converting dev->mutex into dev->spinlock ? Tetsuo Handa
2023-02-05 16:46 ` Alan Stern
2023-02-06 2:56 ` Hillf Danton
2023-02-06 4:44 ` Matthew Wilcox
2023-02-06 5:17 ` Greg Kroah-Hartman
2023-02-06 6:43 ` Hillf Danton
2023-02-06 6:48 ` Greg Kroah-Hartman [this message]
2023-02-04 15:12 ` Alan Stern
2023-02-04 15:30 ` Tetsuo Handa
2023-02-04 15:40 ` Alan Stern
2023-02-05 0:21 ` Hillf Danton
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