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Wed, 15 Apr 2026 08:53:16 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-kbuild@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Wed, 15 Apr 2026 12:53:13 -0300 Message-Id: Subject: Re: [PATCH 5/6] selftests: Preserve subtarget failures in all/install Cc: "Nathan Chancellor" , "Nicolas Schier" , , , , , , To: "Shuah Khan" , =?utf-8?b?UmljYXJkbyBCLiBNYXJsacOocmU=?= , "Mark Brown" , , "Shuah Khan" From: =?utf-8?b?UmljYXJkbyBCLiBNYXJsacOocmU=?= X-Mailer: aerc 0.21.0-120-g22b95d38161f References: <20260320-selftests-fixes-v1-0-79144f76be01@suse.com> <20260320-selftests-fixes-v1-5-79144f76be01@suse.com> <3cdf8e79-7c59-4831-9b38-e9c2cef97fe1@linuxfoundation.org> In-Reply-To: On Wed Apr 15, 2026 at 12:52 PM -03, Shuah Khan wrote: > On 4/15/26 09:42, Ricardo B. Marli=C3=A8re wrote: >> On Wed Apr 15, 2026 at 12:40 PM -03, Shuah Khan wrote: >>> On 4/15/26 07:58, Mark Brown wrote: >>>> On Fri, Mar 20, 2026 at 03:29:20PM -0300, Ricardo B. Marli=C3=A8re wro= te: >>>>> Track failures explicitly in the top-level selftests all/install loop= s. >>>>> >>>>> The current code multiplies `ret` by each sub-make exit status. For >>>>> example, with `TARGETS=3Dnet`, the implicit `net/lib` dependency runs= after >>>>> `net`, so a failed `net` build can be followed by a successful `net/l= ib` >>>>> build and reset the final result to success. >>>>> >>>>> Set `ret` to 1 on any non-zero sub-make exit code and keep it sticky,= so >>>>> the top-level make returns failure when any selected selftest target >>>>> fails. >>>> >>>> This patch, which is now in mainline as 7e47389142b8, is breaking a >>>> bunch of CI systems - at least KernelCI, our Arm internal CI and my >>>> personal stuff. It causes the equivalent of FORCE_TARGETS behaviour i= n >>>> the top level Makefile, the prior behaviour where the exit status of t= he >>>> top level Makefile ignores failures from individual directories is >>>> desirable since by default we try to build almost all the selftests bu= t >>>> between quality issues and build time dependencies it's very common fo= r >>>> at least one of them to fail. With this commit unless the user has >>>> configured a more restricted set of selftests it would be surprising i= f >>>> we manage to get a successful build and install. >>>> >>>> As well as being a poor default due to the very high likelyhood of bui= ld >>>> failures this also has the undesirable effect of causing a build failu= re >>>> in one selftest to cause the whole install target to fail, meaning tha= t >>>> the build failure is escallated to a complete lost of coverge for all >>>> selftests in common CI usage. >>>> >>>> This wasn't showing up in my -next build tests since I set FORCE_TARGE= TS >>>> and explicitly choose a restricted set of kselftests which actually >>>> build with my system and configuration. It was less obvious than it >>>> should have been with the other systems since they did not expect ther= e >>>> to be a complete failure to generate a kselftest tarball and variously >>>> masked the error or reported it in a manner that looked like an >>>> infrastructure issue. >>> >>> I didn't see it when I did test on linux-next and my repo. I did instal= l >>> to catch problems. >>> >>> Sorry for not catching this. We can drop this patch. >>> >>>> >>>> It would be really nice to get to the point where we can reasonably do >>>> this but we're simply not there at the current time. At the moment if >>>> people want to see build failures reported at the top level that reall= y >>>> needs to be opt in, we have FORCE_TARGETS for that. >>> >>> Good point - I will go look and see if we document this in kselftest do= c >>> and add it. >>=20 >> It's not documented. It would have solved my issue, sorry for >> overlooking this! > > Ricardo, Would you like to send me doc patch for this? Sure, thanks! > > thanks, > -- Shuah