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Message-ID: <arfepejkmgi63wepbkfhl2jjbhleh5degel7i3o7htgwjsayqg@z3pjoszloxni> Date: Tue, 16 Sep 2025 13:04:42 +0200 From: Jan Kara <jack@...e.cz> To: Naresh Kamboju <naresh.kamboju@...aro.org> Cc: linux-block <linux-block@...r.kernel.org>, linux-fsdevel@...r.kernel.org, LTP List <ltp@...ts.linux.it>, open list <linux-kernel@...r.kernel.org>, lkft-triage@...ts.linaro.org, Linux Regressions <regressions@...ts.linux.dev>, Christian Brauner <brauner@...nel.org>, chrubis <chrubis@...e.cz>, Petr Vorel <pvorel@...e.cz>, Arnd Bergmann <arnd@...db.de>, Dan Carpenter <dan.carpenter@...aro.org>, Al Viro <viro@...iv.linux.org.uk>, Amir Goldstein <amir73il@...il.com>, Jan Kara <jack@...e.cz>, "Martin K. Petersen" <martin.petersen@...cle.com>, Anuj Gupta <anuj20.g@...sung.com>, Kanchan Joshi <joshi.k@...sung.com>, Anders Roxell <anders.roxell@...aro.org>, Ben Copeland <benjamin.copeland@...aro.org> Subject: Re: next-20250915: LTP chdir01 df01_sh stat04 tst_device.c:97: TBROK: Could not stat loop device 0 On Tue 16-09-25 12:57:26, Naresh Kamboju wrote: > The following LTP chdir01 df01_sh and stat04 tests failed on the rock-pi-4b > qemu-arm64 on the Linux next-20250915 tag build. > > First seen on next-20250915 > Good: next-20250912 > Bad: next-20250915 > > Regression Analysis: > - New regression? yes > - Reproducibility? yes > > * rk3399-rock-pi-4b, ltp-smoke > * qemu-arm64, ltp-smoke > * qemu-arm64-compat, ltp-smoke > - chdir01 > - df01_sh > - stat04 > > Test regression: next-20250915: LTP chdir01 df01_sh stat04 > tst_device.c:97: TBROK: Could not stat loop device 0 This is really strange. Those failing tests all start to complain that /dev/loop0 doesn't exist (open gets ENOENT)... The fact that this is limited to only a few archs suggests it's some race somewhere but I don't see any relevant changes in linux-block in last three days... Honza > > Reported-by: Linux Kernel Functional Testing <lkft@...aro.org> > > ## Test log > <8>[ 53.655971] <LAVA_SIGNAL_STARTTC chdir01> > tst_buffers.c:57: TINFO: Test is using guarded buffers > tst_tmpdir.c:316: TINFO: Using /tmp/LTP_chdm4pHJb as tmpdir (tmpfs filesystem) > tst_device.c:98: TINFO: Found free device 0 '/dev/loop0' > tst_test.c:1953: TINFO: LTP version: 20250530 > tst_test.c:1956: TINFO: Tested kernel: 6.17.0-rc6-next-20250915 #1 SMP > PREEMPT @1757983656 aarch64 > tst_kconfig.c:88: TINFO: Parsing kernel config '/proc/config.gz' > tst_kconfig.c:676: TINFO: CONFIG_TRACE_IRQFLAGS kernel option detected > which might slow the execution > tst_test.c:1774: TINFO: Overall timeout per run is 0h 28m 48s > tst_supported_fs_types.c:97: TINFO: Kernel supports ext2 > tst_supported_fs_types.c:62: TINFO: mkfs.ext2 does exist > tst_supported_fs_types.c:97: TINFO: Kernel supports ext3 > tst_supported_fs_types.c:62: TINFO: mkfs.ext3 does exist > tst_supported_fs_types.c:97: TINFO: Kernel supports ext4 > tst_supported_fs_types.c:62: TINFO: mkfs.ext4 does exist > tst_supported_fs_types.c:128: TINFO: Filesystem xfs is not supported > tst_supported_fs_types.c:97: TINFO: Kernel supports btrfs > tst_supported_fs_types.c:62: TINFO: mkfs.btrfs does exist > tst_supported_fs_types.c:105: TINFO: Skipping bcachefs because of FUSE blacklist > tst_supported_fs_types.c:97: TINFO: Kernel supports vfat > tst_supported_fs_types.c:62: TINFO: mkfs.vfat does exist > tst_supported_fs_types.c:128: TINFO: Filesystem exfat is not supported > tst_supported_fs_types.c:132: TINFO: FUSE does support ntfs > tst_supported_fs_types.c:62: TINFO: mkfs.ntfs does exist > tst_supported_fs_types.c:97: TINFO: Kernel supports tmpfs > tst_supported_fs_types.c:49: TINFO: mkfs is not needed for tmpfs > tst_test.c:1888: TINFO: === Testing on ext2 === > tst_device.c:391: TWARN: Failed to clear 512k block on /dev/loop0 > tst_test.c:1217: TBROK: tst_clear_device() failed > Summary: > passed 0 > failed 0 > broken 1 > skipped 0 > warnings 1 > tst_device.c:283: TWARN: open(/dev/loop0) failed: ENOENT (2) > <8>[ 53.679564] <LAVA_SIGNAL_ENDTC chdir01> > <8>[ 53.708246] <LAVA_SIGNAL_TESTCASE TEST_CASE_ID=chdir01 RESULT=fail> > > <8>[ 53.933883] <LAVA_SIGNAL_STARTTC stat04> > tst_buffers.c:57: TINFO: Test is using guarded buffers > tst_tmpdir.c:316: TINFO: Using /tmp/LTP_staPDxElt as tmpdir (tmpfs filesystem) > tst_device.c:97: TBROK: Could not stat loop device 0 > Summary: > passed 0 > failed 0 > broken 1 > skipped 0 > warnings 0 > <8>[ 53.947889] <LAVA_SIGNAL_ENDTC stat04> > <8>[ 53.974024] <LAVA_SIGNAL_TESTCASE TEST_CASE_ID=stat04 RESULT=fail> > > <8>[ 54.048075] <LAVA_SIGNAL_STARTTC df01_sh> > df01 1 TINFO: Running: df01.sh > df01 1 TINFO: Tested kernel: Linux > runner-j2nyww-sk-project-40964107-concurrent-0 > 6.17.0-rc6-next-20250915 #1 SMP PREEMPT @1757983656 aarch64 GNU/Linux > df01 1 TINFO: Using /tmp/LTP_df01.7pcwUXe1CN as tmpdir (tmpfs filesystem) > tst_device.c:97: TBROK: Could not stat loop device 0 > df01 1 TBROK: Failed to acquire device > Summary: > passed 0 > failed 0 > broken 1 > skipped 0 > warnings 0 > <8>[ 54.060936] <LAVA_SIGNAL_ENDTC df01_sh> > <8>[ 54.087630] <LAVA_SIGNAL_TESTCASE TEST_CASE_ID=df01_sh RESULT=fail> > > ## Source > * Kernel version: 6.17.0-rc6 > * Git tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next.git > * Git describe: 6.17.0-rc6-next-20250915 > * Git commit: c3067c2c38316c3ef013636c93daa285ee6aaa2e > * Architectures: arm64 > * Toolchains: gcc-13 and gcc-8 > * Kconfigs: lkftconfigs > > ## Build > * Test log: https://qa-reports.linaro.org/api/testruns/29896973/log_file/ > * Test details: > https://regressions.linaro.org/lkft/linux-next-master/next-20250915/ltp-smoke/stat04/ > * Test plan: https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/32l4Vv9hKep2EcmS18u3NBtmoAm > * Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/32l4UF8KltAzu6kUpW3hXaYRWjZ/ > * Kernel config: > https://storage.tuxsuite.com/public/linaro/lkft/builds/32l4UF8KltAzu6kUpW3hXaYRWjZ/config > > -- > Linaro LKFT -- Jan Kara <jack@...e.com> SUSE Labs, CR
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