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Wed, 19 Mar 2025 11:44:14 +0000 (GMT) Message-ID: <6debfdf3-2e7b-4581-b1ab-cc5ec1607237@linux.ibm.com> Date: Wed, 19 Mar 2025 17:14:12 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: Venkat Rao Bagalkote Subject: Re: [main-line][PowerPC]selftests/powerpc/signal: sigfuz fails To: Madhavan Srinivasan , Michael Ellerman , linuxppc-dev@lists.ozlabs.org, LKML References: <5f88a95b-1c8d-4a74-9753-9cdb2e64daf4@linux.ibm.com> <87v7s7di56.fsf@mpe.ellerman.id.au> <8efb89d6-cae0-441c-909c-3de5574e9058@linux.ibm.com> Content-Language: en-GB In-Reply-To: <8efb89d6-cae0-441c-909c-3de5574e9058@linux.ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: n8j5TlE9gbBlXD45tQbMS7QjYRdlzNth X-Proofpoint-ORIG-GUID: n8j5TlE9gbBlXD45tQbMS7QjYRdlzNth X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1093,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-03-19_03,2025-03-19_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 phishscore=0 priorityscore=1501 spamscore=0 impostorscore=0 malwarescore=0 clxscore=1015 mlxscore=0 adultscore=0 lowpriorityscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2502280000 definitions=main-2503190080 Thanks Michael and Maddy for the feedback. On 18/03/25 4:20 pm, Madhavan Srinivasan wrote: > On 3/17/25 4:43 PM, Michael Ellerman wrote: >> Venkat Rao Bagalkote writes: >>> Greetings!! >>> >>> I am observing selftests/powerpc/signal:sigfuz test fails on linux >>> mainline repo on IBM Power10 systems. >>> >>> The test passes on the kernel with commit head: >>> 619f0b6fad524f08d493a98d55bac9ab8895e3a6 and fails on the kernel with >>> commit head: ce69b4019001407f9cd738dd2ba217b3a8ab831b on the main line. >>> >>> >>> Repo:https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git >>> >>> I tried to do git bisect and the bisect tool pointed first bad commit >>> to: 16ebb6f5b6295c9688749862a39a4889c56227f8. >>> >>> But upon reverting the first bad commit issue is still seen. So please >>> ignore, if the bisection dosent help. >>> >>> >>> Error: >>> >>> # selftests: powerpc/signal: sigfuz >>> # test: signal_fuzzer >>> # tags: git_version:v6.14-rc7-1-g49c747976afa >>> # !! killing signal_fuzzer >>> # !! child died by signal 15 >>> # failure: signal_fuzzer >>> not ok 3 selftests: powerpc/signal: sigfuz # exit=1 >> That error means the test is timing out and being killed by the test >> harness. >> > I tired multiple times with the config shared by Venkat in my P10 LPAR > and it always passes for me with default timeout as 0. > > > ok 2 selftests: powerpc/signal: signal_tm > # timeout set to 0 > # selftests: powerpc/signal: sigfuz > # test: signal_fuzzer > # tags: git_version:v6.14-rc2-61-g861efb8a48ee > # success: signal_fuzzer > ok 3 selftests: powerpc/signal: sigfuz > # timeout set to 0 > # selftests: powerpc/signal: sigreturn_vdso > # test: sigreturn_vdso > # tags: git_version:v6.14-rc2-61-g861efb8a48ee > # VDSO is at 0x7fff9aac0000-0x7fff9aacffff (65536 bytes) > # Signal delivered OK with VDSO mapped > # VDSO moved to 0x7fff9aa50000-0x7fff9aa5ffff (65536 bytes) > # Signal delivered OK with VDSO moved > # Unmapped VDSO > # Remapped the stack executable > # Signal delivered OK with VDSO unmapped > # success: sigreturn_vdso > > > Setup: P10 LPAR with 16CPUs, LPAR running only the selftest > Kernel: powerpc/next (861efb8a48ee), config shared by venkat > > Maddy > > > One key difference which I could figure out so far in the set up is, mine is Power10 system running on P11 FW. > > I quickly gave a try with P10 system with P10 FW, and issue is not seen. > > Logs from P10 system running on P10 FW: > > make -j 33 -C powerpc/signal/ run_tests make: Entering directory > '/root/venkat/linux/tools/testing/selftests/powerpc/signal' TAP > version 13 1..7 # timeout set to 0 # selftests: powerpc/signal: signal > # test: signal # tags: git_version:v6.14-rc7-69-g81e4f8d68c66 # > success: signal ok 1 selftests: powerpc/signal: signal # timeout set > to 0 # selftests: powerpc/signal: signal_tm # test: signal_tm # tags: > git_version:v6.14-rc7-69-g81e4f8d68c66 # [SKIP] Test skipped on line > 58 # skip: signal_tm ok 2 selftests: powerpc/signal: signal_tm # > timeout set to 0 # selftests: powerpc/signal: sigfuz # test: > signal_fuzzer # tags: git_version:v6.14-rc7-69-g81e4f8d68c66 # > success: signal_fuzzer ok 3 selftests: powerpc/signal: sigfuz # > timeout set to 0 # selftests: powerpc/signal: sigreturn_vdso # test: > sigreturn_vdso # tags: git_version:v6.14-rc7-69-g81e4f8d68c66 # VDSO > is at 0x7fffae2e0000-0x7fffae2effff (65536 bytes) # Signal delivered > OK with VDSO mapped # VDSO moved to 0x7fffae270000-0x7fffae27ffff > (65536 bytes) # Signal delivered OK with VDSO moved # Unmapped VDSO # > Remapped the stack executable # Signal delivered OK with VDSO unmapped > # success: sigreturn_vdso ok 4 selftests: powerpc/signal: > sigreturn_vdso # timeout set to 0 # selftests: powerpc/signal: > sig_sc_double_restart # test: sig sys restart # tags: > git_version:v6.14-rc7-69-g81e4f8d68c66 # success: sig sys restart ok 5 > selftests: powerpc/signal: sig_sc_double_restart # timeout set to 0 # > selftests: powerpc/signal: sigreturn_kernel # test: sigreturn_kernel # > tags: git_version:v6.14-rc7-69-g81e4f8d68c66 # All children killed as > expected # success: sigreturn_kernel ok 6 selftests: powerpc/signal: > sigreturn_kernel # timeout set to 0 # selftests: powerpc/signal: > sigreturn_unaligned # test: sigreturn_unaligned # tags: > git_version:v6.14-rc7-69-g81e4f8d68c66 # success: sigreturn_unaligned > ok 7 selftests: powerpc/signal: sigreturn_unaligned make: Leaving > directory '/root/venkat/linux/tools/testing/selftests/powerpc/signal' >> That could be due to a bug, but it could just be that your system is >> overloaded or something. You can increase the timeout in the code by >> adding a call to test_harness_timeout(). >> >> The test also includes lots of randomisation, so if you actually need to >> bisect it you'd want to change the code to use a consistent random seed >> in the calls to srand(). >> >> cheers > I increased the timeout from 0 to 120, I still see the issue. > > Below are the logs with and with out time out. > > make -j 33 -C powerpc/signal/ run_tests all clean clean_mods_dir > emit_tests gen_mods_dir install run_tests [root@ltcden8-lp3 > selftests]# make -j 33 -C powerpc/signal/ run_tests make: Entering > directory '/root/linux/tools/testing/selftests/powerpc/signal' CC > signal CC signal_tm CC sigfuz CC sigreturn_vdso CC > sig_sc_double_restart CC sigreturn_kernel CC sigreturn_unaligned TAP > version 13 1..7 # timeout set to 0 # selftests: powerpc/signal: signal > # test: signal # tags: git_version:v6.14-rc7-69-g81e4f8d68c66 # > success: signal ok 1 selftests: powerpc/signal: signal # timeout set > to 0 # selftests: powerpc/signal: signal_tm # test: signal_tm # tags: > git_version:v6.14-rc7-69-g81e4f8d68c66 # [SKIP] Test skipped on line > 58 # skip: signal_tm ok 2 selftests: powerpc/signal: signal_tm # > timeout set to 0 # selftests: powerpc/signal: sigfuz # test: > signal_fuzzer # tags: git_version:v6.14-rc7-69-g81e4f8d68c66 # !! > killing signal_fuzzer # !! child died by signal 15 # failure: > signal_fuzzer not ok 3 selftests: powerpc/signal: sigfuz # exit=1 # > timeout set to 0 # selftests: powerpc/signal: sigreturn_vdso # test: > sigreturn_vdso # tags: git_version:v6.14-rc7-69-g81e4f8d68c66 # VDSO > is at 0x7fffb1860000-0x7fffb186ffff (65536 bytes) # Signal delivered > OK with VDSO mapped # VDSO moved to 0x7fffb17f0000-0x7fffb17fffff > (65536 bytes) # Signal delivered OK with VDSO moved # Unmapped VDSO # > Remapped the stack executable # Signal delivered OK with VDSO unmapped > # success: sigreturn_vdso ok 4 selftests: powerpc/signal: > sigreturn_vdso # timeout set to 0 # selftests: powerpc/signal: > sig_sc_double_restart # test: sig sys restart # tags: > git_version:v6.14-rc7-69-g81e4f8d68c66 # success: sig sys restart ok 5 > selftests: powerpc/signal: sig_sc_double_restart # timeout set to 0 # > selftests: powerpc/signal: sigreturn_kernel # test: sigreturn_kernel # > tags: git_version:v6.14-rc7-69-g81e4f8d68c66 # All children killed as > expected # success: sigreturn_kernel ok 6 selftests: powerpc/signal: > sigreturn_kernel # timeout set to 0 # selftests: powerpc/signal: > sigreturn_unaligned # test: sigreturn_unaligned # tags: > git_version:v6.14-rc7-69-g81e4f8d68c66 # success: sigreturn_unaligned > ok 7 selftests: powerpc/signal: sigreturn_unaligned make: Leaving > directory '/root/linux/tools/testing/selftests/powerpc/signal' > # vi powerpc/signal/settings make -j 33 -C powerpc/signal/ run_tests > make: Entering directory > '/root/linux/tools/testing/selftests/powerpc/signal' TAP version 13 > 1..7 # timeout set to 120 # selftests: powerpc/signal: signal # test: > signal # tags: git_version:v6.14-rc7-69-g81e4f8d68c66 # success: > signal ok 1 selftests: powerpc/signal: signal # timeout set to 120 # > selftests: powerpc/signal: signal_tm # test: signal_tm # tags: > git_version:v6.14-rc7-69-g81e4f8d68c66 # [SKIP] Test skipped on line > 58 # skip: signal_tm ok 2 selftests: powerpc/signal: signal_tm # > timeout set to 120 # selftests: powerpc/signal: sigfuz # test: > signal_fuzzer # tags: git_version:v6.14-rc7-69-g81e4f8d68c66 # not ok > 3 selftests: powerpc/signal: sigfuz # TIMEOUT 120 seconds # timeout > set to 120 # selftests: powerpc/signal: sigreturn_vdso # test: > sigreturn_vdso # tags: git_version:v6.14-rc7-69-g81e4f8d68c66 # VDSO > is at 0x7fff8b170000-0x7fff8b17ffff (65536 bytes) # Signal delivered > OK with VDSO mapped # VDSO moved to 0x7fff8b100000-0x7fff8b10ffff > (65536 bytes) # Signal delivered OK with VDSO moved # Unmapped VDSO # > Remapped the stack executable # Signal delivered OK with VDSO unmapped > # success: sigreturn_vdso ok 4 selftests: powerpc/signal: > sigreturn_vdso # timeout set to 120 # selftests: powerpc/signal: > sig_sc_double_restart # test: sig sys restart # tags: > git_version:v6.14-rc7-69-g81e4f8d68c66 # success: sig sys restart ok 5 > selftests: powerpc/signal: sig_sc_double_restart # timeout set to 120 > # selftests: powerpc/signal: sigreturn_kernel # test: sigreturn_kernel > # tags: git_version:v6.14-rc7-69-g81e4f8d68c66 # All children killed > as expected # success: sigreturn_kernel ok 6 selftests: > powerpc/signal: sigreturn_kernel # timeout set to 120 # selftests: > powerpc/signal: sigreturn_unaligned # test: sigreturn_unaligned # > tags: git_version:v6.14-rc7-69-g81e4f8d68c66 # success: > sigreturn_unaligned ok 7 selftests: powerpc/signal: > sigreturn_unaligned make: Leaving directory > '/root/linux/tools/testing/selftests/powerpc/signal' [root@ltcden8-lp3 > selftests]# [root@ltcden8-lp3 selftests]# [root@ltcden8-lp3 > selftests]# uname -r 6.14.0-rc7-00069-g81e4f8d68c66 [root@ltcden8-lp3 > selftests]# Regards, Venkat.