From: Shuah Khan <shuahkh-JPH+aEBZ4P+UEJcrhfAQsw@public.gmane.org>
To: Theodore Ts'o <tytso-3s7WtUTddSA@public.gmane.org>
Cc: "Eric W. Biederman"
<ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>,
Steven Rostedt <rostedt-nx8X9YLhiw1AfugRpC6u6w@public.gmane.org>,
Guenter Roeck <linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>,
ksummit-discuss-cunTk1MwBs98uUxBSJOaYoYkZiVZrdSR2LY78lusg7I@public.gmane.org,
Carlos O'Donell <carlos-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Thorsten Leemhuis <linux-rCxcAJFjeRkk+I/owrrOrA@public.gmane.org>,
linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Shuah Khan <shuah-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Shuah Khan <shuahkh-JPH+aEBZ4P+UEJcrhfAQsw@public.gmane.org>
Subject: Re: [Ksummit-discuss] [MAINTAINERS SUMMIT] & [TECH TOPIC] Improve regression tracking
Date: Thu, 3 Aug 2017 12:51:07 -0600 [thread overview]
Message-ID: <a313d401-d18b-ed9a-d82d-f6e12f606743@osg.samsung.com> (raw)
In-Reply-To: <20170803030327.gf7pl7foer3abdpe-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
On 08/02/2017 09:03 PM, Theodore Ts'o wrote:
> On Wed, Aug 02, 2017 at 12:42:04PM -0600, Shuah Khan wrote:
>>>>> $ make O=$PWD-build -j8 kselftests
>>>>> make[1]: Entering directory 'linux-build'
>>>>> make[1]: *** No rule to make target 'kselftests'. Stop.
>>>>> make[1]: Leaving directory 'linux-build'
>>>>> Makefile:145: recipe for target 'sub-make' failed
>>>>> make: *** [sub-make] Error 2
>>
>> There are multiple ways to run selftests at the moment. If your
>> preferred use-case isn't supported, I don't see why it can't be
>> added.
>
> There are many of us who use separate object directories so we can
> build the same kernel tree with multiple configurations. So for
> example, my kernel sources will be on an SSD, but sometimes my /build
> directory will be on a HDD since storing the object files on an HDD
> don't really buy as much as keeping the sources on SSD.
>
> For example, so I might be doing builds via:
>
> make O=/build/ext4 -j8
>
> and
>
> make O=/build/ext4-32 ARCH=i386 -j8
>
> Or someone might have a separate config file for doing debugging which
> is different from their production kernel, which they could do by
> having a different .config file in /build/ext4-debug/.config.
>
>>>> It is "make kselftest"
>>>
>>> If I include the standard O= to keep my source tree pristine
>>> it still fails. Which is a practical issue. Especially because
>>> that "make kselftest" needs to be followed by I think "make mrproper"
>>> to get back to my normal development workflow.
>>
>> Hmm. not sure why you would need to run "make mrproper" after running
>> "make kselftest" - I never have to. I would like to understand why though
>> if you are seeing problems without running "make mrproper".
>
> The problem is that if you are doing builds in separate object
> directories, you must not have any build files in the source tree.
> Otherwise make gets terribly confused. If you have done a build in
> the source tree, then "make O=..." will because the Kernel makefile
> system has safety check which detects this case and complains:
>
> % make O=/build/linux-build
> make[1]: Entering directory '/build/linux-build'
> CHK include/config/kernel.release
> GEN ./Makefile
> CHK include/generated/uapi/linux/version.h
> CHK scripts/mod/devicetable-offsets.h
> Using /home/tytso/linux/linux as source for kernel
> /home/tytso/linux/linux is not clean, please run 'make mrproper'
> ...
>
> So this is why Eric said that he has to run "make mrproper" after
> doing "make kselftest". That's because doing any kind of build in the
> source tree breaks his (and my) normal kernel building system.
Thanks for the detailed explanation. I have a better understanding
of the workflow.
>
> Personally, I do all of my testing using xfstests (and gce-xfstests in
> particular). And so I don't have a lot of reason to spend time making
> kselftest work with the "make O=xxx" build paradigm.
Now that I have a better understanding, I will take a look. Based on
quick look, it might not be difficult to support it.
>
> It's fair to say the fact that kselftest doesn't work with my kernel
> development workflow hasn't helped my motivation to try it out. But
> as I told the systemtap folks many years ago --- "you're not under any
> obligation to support my workflow; but if systemtap is hostile to my
> kernel development workflow, you also can't expect me to help support
> and grow the use of systemtap, either. It works both ways."
>
> The same I think applies to kselftest. Telling developers who
> complain that kselftest doesn't work well with their workflow to "send
> a patch" may not result in the reaction that you hope. Especially for
> something as similar as "make O=xxx", which I think is a pretty common
> development workflow. Anyway, I hope someone will care enough about
> kselftest to help support "make O=xxx"; I have to admit that someone
> isn't me, though. Sorry; I just don't have the time....
>
It wasn't my intent to be hostile.
thanks,
-- Shuah
next prev parent reply other threads:[~2017-08-03 18:51 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
[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 [this message]
[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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