Hi Caspar and Sumit,
We encountered test failure in the second case in a debug kernel, reproducible about once out of 20 times run.
Interesting case. Can you share results after applying below patch?
Tested this patch, no TFAIL occured in debug kernel after 200+ times run, looks good to me. Thanks! Please add my
From these results, the reason for the failure that you reported earlier seems to be writes to the device during "tst_fill_fd()" operation (they were found negligible/zero with normal kernel). But it's strange to know that you didn't get any TFAIL after the patch as I expected "Sync equals write" to fail.
So can you also put following debug print and share logs of your test run?
Retested with debug print, during my 1000-times run, pre-sync remains 0 in all the other fs types except only ext4. For ext4 cases, pre-sync could be non-zero, e.g.:
Sync equals write: Synced 33554432, expected 33554432, pre-sync 0 Sync inside of write: Synced 17301504, expected 16777216, pre-sync 1308672 Sync overlaps with write: Synced 8650752, expected 8388608, pre-sync 1310720Note that pre-sync could be non-zero in `equals writes` case sometimes too, like another round below:
Sync equals write: Synced 34078720, expected 33554432, pre-sync 260096 Sync inside of write: Synced 17039360, expected 16777216, pre-sync 4980736 Sync overlaps with write: Synced 8912896, expected 8388608, pre-sync 1048576Such non-zero situation in ext4 case is reproducible ~10% of my 1000-times run.
sync_file_range02 test failure reproduced on mainline and stable rc branches 5.3, 4.19, 4.14 on arm64 and arm devices while testing on ext4.
output log, -------------- tst_test.c:1179: INFO: Testing on ext2 tst_mkfs.c:90: INFO: Formatting /dev/loop0 with ext2 opts='' extra opts='' mke2fs 1.43.8 (1-Jan-2018) tst_test.c:1118: INFO: Timeout per run is 0h 15m 00s sync_file_range02.c:71: PASS: Sync equals write sync_file_range02.c:71: PASS: Sync inside of write sync_file_range02.c:71: PASS: Sync overlaps with write tst_test.c:1179: INFO: Testing on ext3 tst_mkfs.c:90: INFO: Formatting /dev/loop0 with ext3 opts='' extra opts='' mke2fs 1.43.8 (1-Jan-2018) Listened to connection for namespace 'tlxc' done [ 1349.061989] EXT4-fs (loop0): mounting ext3 file system using the ext4 subsystem [ 1349.099564] EXT4-fs (loop0): mounted filesystem with ordered data mode. Opts: (null) tst_test.c:1118: INFO: Timeout per run is 0h 15m 00s sync_file_range02.c:71: PASS: Sync equals write Listened to connection for namespace 'tlxc' done sync_file_range02.c:71: PASS: Sync inside of write sync_file_range02.c:71: PASS: Sync overlaps with write tst_test.c:1179: INFO: Testing on ext4 tst_mkfs.c:90: INFO: Formatting /dev/loop0 with ext4 opts='' extra opts='' mke2fs 1.43.8 (1-Jan-2018) [ 1362.579639] EXT4-fs (loop0): mounted filesystem with ordered data mode. Opts: (null) tst_test.c:1118: INFO: Timeout per run is 0h 15m 00s sync_file_range02.c:74: FAIL: Sync equals write: Synced 36960256, expected 33554432 Listened to connection for namespace 'tlxc' done sync_file_range02.c:74: FAIL: Sync inside of write: Synced 20185088, expected 16777216 sync_file_range02.c:71: PASS: Sync overlaps with write Summary: passed 7 failed 2
Full output log, -------------------- https://lkft.validation.linaro.org/scheduler/job/983166#L15067
- Naresh