From: James Bottomley <James.Bottomley-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
To: Steven Rostedt <rostedt-nx8X9YLhiw1AfugRpC6u6w@public.gmane.org>,
Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: ksummit-discuss-cunTk1MwBs98uUxBSJOaYoYkZiVZrdSR2LY78lusg7I@public.gmane.org,
Carlos O'Donell <carlos-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Shuah Khan <shuahkh-JPH+aEBZ4P+UEJcrhfAQsw@public.gmane.org>,
Thorsten Leemhuis <linux-rCxcAJFjeRkk+I/owrrOrA@public.gmane.org>,
linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [Ksummit-discuss] [MAINTAINERS SUMMIT] & [TECH TOPIC] Improve regression tracking
Date: Wed, 05 Jul 2017 07:50:28 -0700 [thread overview]
Message-ID: <1499266228.3668.10.camel@HansenPartnership.com> (raw)
In-Reply-To: <20170705103658.226099c6-f9ZlEuEWxVcJvu8Pb33WZ0EMvNT87kid@public.gmane.org>
On Wed, 2017-07-05 at 10:36 -0400, Steven Rostedt wrote:
> On Wed, 5 Jul 2017 15:33:41 +0100
> Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> wrote:
>
> >
> > On Wed, Jul 05, 2017 at 04:06:07PM +0200, Greg KH wrote:
> >
> > >
> > > I don't mean to poo-poo the idea, but please realize that around
> > > 75% of the kernel is hardware/arch support, so that means that
> > > 75% of the changes/fixes deal with hardware things (yes, change
> > > is in direct correlation to size of the codebase in the tree,
> > > strange but true).
> >
> > Then add in all the fixes for concurrency/locking issues and so on
> > that're hard to reliably reproduce as well...
>
> All tests should be run with lockdep enabled ;-) Which a surprising
> few developers appear to do :-p
Lockdep checks the locking hierarchies and makes assumptions about them
which it then validates ... it doesn't tell you if the data you think
you're protecting was accessed outside the lock, which is the usual
source of concurrency problems. In other words lockdep is useful but
it's not a panacea.
James
next prev parent reply other threads:[~2017-07-05 14:50 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <576cea07-770a-4864-c3f5-0832ff211e94@leemhuis.info>
[not found] ` <576cea07-770a-4864-c3f5-0832ff211e94-rCxcAJFjeRkk+I/owrrOrA@public.gmane.org>
2017-07-03 16:30 ` [Ksummit-discuss] [MAINTAINERS SUMMIT] & [TECH TOPIC] Improve regression tracking Steven Rostedt
[not found] ` <20170703123025.7479702e-f9ZlEuEWxVcJvu8Pb33WZ0EMvNT87kid@public.gmane.org>
2017-07-03 18:50 ` Dan Williams
2017-07-04 19:03 ` Thorsten Leemhuis
[not found] ` <ad94dc65-cc9c-f4f1-27c1-5a48603c7f59-rCxcAJFjeRkk+I/owrrOrA@public.gmane.org>
2017-07-05 12:45 ` Steven Rostedt
[not found] ` <20170705084528.67499f8c-f9ZlEuEWxVcJvu8Pb33WZ0EMvNT87kid@public.gmane.org>
2017-07-05 13:09 ` Carlos O'Donell
[not found] ` <4080ecc7-1aa8-2940-f230-1b79d656cdb4-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2017-07-05 13:27 ` Steven Rostedt
[not found] ` <20170705092757.63dc2328-f9ZlEuEWxVcJvu8Pb33WZ0EMvNT87kid@public.gmane.org>
2017-07-05 14:06 ` Greg KH
[not found] ` <20170705140607.GA30187-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2017-07-05 14:28 ` Carlos O'Donell
2017-07-05 14:33 ` Steven Rostedt
[not found] ` <20170705103335.0cbd9984-f9ZlEuEWxVcJvu8Pb33WZ0EMvNT87kid@public.gmane.org>
2017-07-05 14:52 ` Mark Brown
2017-07-05 15:08 ` Carlos O'Donell
[not found] ` <8c6843e8-73d9-a898-0366-0b72dfeb79a2-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2017-07-05 16:10 ` Steven Rostedt
[not found] ` <20170705121000.5430d7d0-f9ZlEuEWxVcJvu8Pb33WZ0EMvNT87kid@public.gmane.org>
2017-07-06 11:34 ` Laurent Pinchart
2017-07-09 13:46 ` Thorsten Leemhuis
2017-07-05 14:33 ` Mark Brown
[not found] ` <20170705143341.oees22k2snhtmkxo-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2017-07-05 14:36 ` Steven Rostedt
[not found] ` <20170705103658.226099c6-f9ZlEuEWxVcJvu8Pb33WZ0EMvNT87kid@public.gmane.org>
2017-07-05 14:50 ` James Bottomley [this message]
[not found] ` <1499266228.3668.10.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-07-05 14:56 ` Steven Rostedt
[not found] ` <20170705105651.5da9c969-f9ZlEuEWxVcJvu8Pb33WZ0EMvNT87kid@public.gmane.org>
2017-07-05 15:09 ` James Bottomley
[not found] ` <1499267389.3668.16.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-07-05 15:20 ` Mark Brown
[not found] ` <20170705152026.rkw73q2f6xmiju37-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2017-07-05 15:40 ` Geert Uytterhoeven
2017-07-05 15:20 ` Steven Rostedt
[not found] ` <20170705112047.23ee09f6-f9ZlEuEWxVcJvu8Pb33WZ0EMvNT87kid@public.gmane.org>
2017-07-05 15:32 ` James Bottomley
[not found] ` <1499268748.3668.20.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-07-05 15:43 ` Steven Rostedt
2017-07-05 18:24 ` Daniel Vetter
2017-07-05 18:17 ` Daniel Vetter
2017-07-05 15:16 ` Guenter Roeck
[not found] ` <a462fb3b-a6d4-e969-b301-b404981de224-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2017-07-05 15:27 ` Steven Rostedt
[not found] ` <20170705112707.54d7f345-f9ZlEuEWxVcJvu8Pb33WZ0EMvNT87kid@public.gmane.org>
2017-07-05 15:36 ` James Bottomley
[not found] ` <1499269015.3668.25.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-07-05 16:04 ` Steven Rostedt
[not found] ` <20170705120459.41e81f7b-f9ZlEuEWxVcJvu8Pb33WZ0EMvNT87kid@public.gmane.org>
2017-07-05 16:58 ` James Bottomley
[not found] ` <1499273908.3668.30.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-07-05 17:07 ` Steven Rostedt
2017-07-05 16:48 ` Guenter Roeck
[not found] ` <c782a15a-4e73-7373-ca66-5b55e9406059-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2017-07-05 16:58 ` Dan Williams
2017-07-05 17:02 ` Steven Rostedt
[not found] ` <20170705130200.7c653f61-f9ZlEuEWxVcJvu8Pb33WZ0EMvNT87kid@public.gmane.org>
2017-07-06 9:28 ` Mark Brown
[not found] ` <20170706092836.ifcnc2qqwufndhdl-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2017-07-06 9:41 ` Daniel Vetter
[not found] ` <CAKMK7uFH+Kz8Mdph=J_FCZ4LC3tzoOmwNJPpSO+snTz6p0Xz+w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-07-06 14:53 ` Theodore Ts'o
[not found] ` <20170706145346.6w2uzcf7xacbr3or-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2017-07-06 21:28 ` Daniel Vetter
2017-07-06 14:48 ` James Bottomley
[not found] ` <1499352485.2765.14.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-07-07 10:03 ` Mark Brown
2017-07-31 16:54 ` Eric W. Biederman
[not found] ` <87zibkzgve.fsf-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-07-31 20:11 ` Steven Rostedt
[not found] ` <20170731161123.4d1e80ac-f9ZlEuEWxVcJvu8Pb33WZ0EMvNT87kid@public.gmane.org>
2017-07-31 20:12 ` Eric W. Biederman
2017-08-02 16:53 ` Shuah Khan
[not found] ` <fb399eba-91eb-21a5-e3f5-c3f919061c12-JPH+aEBZ4P+UEJcrhfAQsw@public.gmane.org>
2017-08-02 17:33 ` Eric W. Biederman
[not found] ` <87lgn1nac8.fsf-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-08-02 17:46 ` Shuah Khan
[not found] ` <61093c3f-6ad0-c033-a524-f2624f8d55ba-JPH+aEBZ4P+UEJcrhfAQsw@public.gmane.org>
2017-08-02 17:58 ` Shuah Khan
2017-08-02 18:04 ` Eric W. Biederman
[not found] ` <87r2wtluc1.fsf-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-08-02 18:23 ` Randy Dunlap
2017-08-02 18:42 ` Shuah Khan
[not found] ` <92c31d6f-f98d-c764-eeec-bd0a2316d769-JPH+aEBZ4P+UEJcrhfAQsw@public.gmane.org>
2017-08-03 3:03 ` Theodore Ts'o
[not found] ` <20170803030327.gf7pl7foer3abdpe-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2017-08-03 17:42 ` Bird, Timothy
[not found] ` <ECADFF3FD767C149AD96A924E7EA6EAF3AD01BAB-t8YLG9SB9XQEb75RT/aEbJZPSYnAH24X@public.gmane.org>
2017-08-03 22:11 ` Shuah Khan
2017-08-03 18:51 ` Shuah Khan
[not found] ` <a313d401-d18b-ed9a-d82d-f6e12f606743-JPH+aEBZ4P+UEJcrhfAQsw@public.gmane.org>
2017-08-04 1:15 ` Theodore Ts'o
2017-07-07 3:33 ` Fengguang Wu
[not found] ` <20170707033302.rgpq5knzx3qvvr2p-q6ZYBFIlbFFi0tQiZxhdj1DQ4js95KgL@public.gmane.org>
2017-07-07 4:52 ` Frank Rowand
2017-07-05 15:32 ` Greg KH
[not found] ` <20170705153259.GA7265-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2017-07-05 15:36 ` Carlos O'Donell
2017-07-05 15:52 ` Steven Rostedt
[not found] ` <20170705115219.02370220-f9ZlEuEWxVcJvu8Pb33WZ0EMvNT87kid@public.gmane.org>
2017-07-05 18:42 ` Greg KH
2017-07-05 18:29 ` Daniel Vetter
2017-07-06 22:24 ` Shuah Khan
[not found] ` <a2fada39-76d4-e136-f2db-d8306d929902-JPH+aEBZ4P+UEJcrhfAQsw@public.gmane.org>
2017-07-06 22:32 ` Steven Rostedt
[not found] ` <20170706183249.60b2aef9-f9ZlEuEWxVcJvu8Pb33WZ0EMvNT87kid@public.gmane.org>
2017-07-06 22:40 ` Shuah Khan
2017-07-05 16:54 ` Dan Williams
[not found] ` <CAPcyv4iOV2-hndx1rQmpPQF+myp=P8rmpf5JhXQXZxPhR6qoQw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-07-05 18:45 ` Greg KH
[not found] ` <20170705184544.GB22044-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2017-07-05 19:47 ` Dan Williams
2017-07-05 14:06 ` Carlos O'Donell
2017-07-05 15:47 ` Mark Brown
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