linux-kernel - Re: [PATCH v4 0/1] Add livepatch kselftests

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Message-ID: <20180511025324.GA17456@yexl-desktop>
Date:   Fri, 11 May 2018 10:53:24 +0800
From:   Ye Xiaolong <xiaolong.ye@...el.com>
To:     Joe Lawrence <joe.lawrence@...hat.com>
Cc:     live-patching@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org, Philip Li <philip.li@...el.com>
Subject: Re: [PATCH v4 0/1] Add livepatch kselftests

Hi, Joe

Sorry for the late response.

On 04/26, Joe Lawrence wrote:
>>On 04/25/2018 02:28 PM, Joe Lawrence wrote:
>
>> [ ... snip ... ]
>> 
>> base-commit: 0adb32858b0bddf4ada5f364a84ed60b196dbcda
>> prerequisite-patch-id: 5ed747c1a89a5dc4bba08186e21f927d7f3bf049
>> prerequisite-patch-id: e9800288b71a9f339ea066e58d9ef70dece67083
>> prerequisite-patch-id: 415f2e190b1b50142c78f2940c7b8dd39b5321a0
>> prerequisite-patch-id: d229d9cf08af087e0a758d9df1da467103c2c200
>> prerequisite-patch-id: b8c7ef99b13c6b321cba5e8919ed0b3e29f213e9
>> prerequisite-patch-id: 4e10c0d08f151b18310fe0b1e5013d62db94cfeb
>> prerequisite-patch-id: 33046b190c114d202f3a52e0e274dbb2b1907a4c
>> prerequisite-patch-id: 6978944a725756317dd4e005d479b6101784aaf0
>> prerequisite-patch-id: cce9d3c7e1ae8887f387ca9e072552dc63479749
>> prerequisite-patch-id: c44ccc5dd7b1be6fe2b1f32ca6abde1da73fae79
>> 
>
>Hi kbuild test robot folks,
>
>I attempted to use the --base option with git format-patch as suggested
>by Philip, but the bot still sent me mail (addressed only to myself and
>cc'd kbuild-all@...org) about build test ERRORs against the wrong base:
>
>> [auto build test ERROR on v4.16]
>> [also build test ERROR on next-20180424]
>> [cannot apply to linus/master jikos-livepatching/for-next]

I noticed this error report was for [PATCH v3] selftests/livepatch: introduce tests
which doesn't include the base commit info.

>
>I'm assuming operator error :(  Here's a summary of my workflow:
>
>* Save an .mbox of the entire base patchset, as posted to the
>live-patching list:
>
>  https://lkml.org/lkml/2018/3/23/665
>
>* Create a "base" branch and apply the mbox:
>
>  % git checkout -b test_base v4.16
>  Switched to a new branch 'test_base'
>
>  % git am /tmp/pm.mbox
>  Applying: livepatch: Use lists to manage patches, objects and functions
>  Applying: livepatch: Free only structures with initialized kobject
>  Applying: livepatch: Add atomic replace
>  Applying: livepatch: Add an extra flag to distinguish registered   patches
>  Applying: livepatch: Remove replaced patches from the stack
>  Applying: livepatch: Remove Nop structures when unused
>  Applying: livepatch: Allow to replace even disabled patches
>  Applying: livepatch: Atomic replace and cumulative patches documentation
>
>* Create a new dev branch from the base, make a trivial change and commit:
>
>  % git checkout -b test_branch test_base
>  % sed -i 's/^EXTRAVERSION =/EXTRAVERSION = .test/' Makefile
>  % git commit Makefile -m 'test commit'
>
>* Create .patch files with --base:
>
>  % git format-patch --base=v4.16 -1 --cover-letter
>  % grep -e '^base-commit' -e 'prereq' 0000-cover-letter.patch
>  base-commit: 0adb32858b0bddf4ada5f364a84ed60b196dbcda
>  prerequisite-patch-id: 5ed747c1a89a5dc4bba08186e21f927d7f3bf049
>  prerequisite-patch-id: e9800288b71a9f339ea066e58d9ef70dece67083
>  prerequisite-patch-id: 415f2e190b1b50142c78f2940c7b8dd39b5321a0
>  prerequisite-patch-id: d229d9cf08af087e0a758d9df1da467103c2c200
>  prerequisite-patch-id: b8c7ef99b13c6b321cba5e8919ed0b3e29f213e9
>  prerequisite-patch-id: 4e10c0d08f151b18310fe0b1e5013d62db94cfeb
>  prerequisite-patch-id: 33046b190c114d202f3a52e0e274dbb2b1907a4c
>  prerequisite-patch-id: 6978944a725756317dd4e005d479b6101784aaf0
>
>I notice that these patch-ids are only added to the cover-letter... do I
>need to force them each individual patch as well?  /confused

I think the work flow you described above is ok, you can just send them with
git send-email after doing that, and base commit/prerequisite patch info in
cover-letter is fine, the question here is I can't find the patch emails of
your patchset except the cover letter in 0day's mail archive, do you send them
as a whole series, could you tell the subjects of them so I can take a look in
0day's log.

Thanks,
Xiaolong

>
>Thanks,
>
>-- Joe