This works with ARM64 ThunderX node "starmie" on 18.04 with 4.15 kernel
It looks like since 4.18 kernel, this SyS_write has been changed into
ksys_write
Test result from 5.0.0 ARM64 ThunderX node "wright"
# grep ksys_write ftrace.log |grep dd | tail
dd-1389 [002] .... 801.332505: vfs_write <-ksys_write
dd-1389 [002] .... 801.333108: ksys_write <-__arm64_sys_write
dd-1389 [002] .... 801.333108: __fdget_pos <-ksys_write
dd-1389 [002] .... 801.333109: vfs_write <-ksys_write
dd-1389 [002] .... 801.333154: ksys_write <-__arm64_sys_write
dd-1389 [002] .... 801.333154: __fdget_pos <-ksys_write
dd-1389 [002] .... 801.333155: vfs_write <-ksys_write
dd-1389 [002] .... 801.333162: ksys_write <-__arm64_sys_write
dd-1389 [002] .... 801.333162: __fdget_pos <-ksys_write
dd-1389 [002] .... 801.333163: vfs_write <-ksys_write
# uname -a
Linux ms10-34-mcdivittB0-kernel 5.0.0-7-generic #8-Ubuntu SMP Mon Mar 4
16:27:27 UTC 2019 aarch64 aarch64 aarch64 GNU/Linux
Test result from 4.18.0 AMD64 node "onibi":
# grep ksys_write ftrace.log | grep dd | tail
dd-2036 [001] .... 325.866508: vfs_write <-ksys_write
dd-2036 [001] .... 325.866722: ksys_write <-__x64_sys_write
dd-2036 [001] .... 325.866722: __fdget_pos <-ksys_write
dd-2036 [001] .... 325.866722: vfs_write <-ksys_write
dd-2036 [001] .... 325.866747: ksys_write <-__x64_sys_write
dd-2036 [001] .... 325.866747: __fdget_pos <-ksys_write
dd-2036 [001] .... 325.866747: vfs_write <-ksys_write
dd-2036 [001] .... 325.866750: ksys_write <-__x64_sys_write
dd-2036 [001] .... 325.866750: __fdget_pos <-ksys_write
dd-2036 [001] .... 325.866750: vfs_write <-ksys_write
# uname -a
Linux onibi 4.18.0-16-generic #17-Ubuntu SMP Fri Feb 8 00:06:57 UTC 2019 x86_64
x86_64 x86_64 GNU/Linux
** Also affects: linux (Ubuntu Disco)
Importance: Undecided
Status: Incomplete
** Also affects: linux (Ubuntu Cosmic)
Importance: Undecided
Status: New
** Also affects: ubuntu-kernel-tests
Importance: Undecided
Status: New
** No longer affects: linux (Ubuntu)
** No longer affects: linux (Ubuntu Cosmic)
** No longer affects: linux (Ubuntu Disco)
** Tags added: disco
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https://bugs.launchpad.net/bugs/1818612
Title:
ubuntu_ftrace_smoke_test failed with 0 SyS_write traces found
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