Heinrich, you might have hit the nail on the head: I'm using only ZFS on
this system. Maybe fatrace thinks zfs doesn't exist, and thus doesn't
bother tracing it -- that would explain why the only fatrace output I
get on this computer is on squashfs mounts.
A quick test on a Bionic system with
The fatrace code has the following comment:
/* Only consider mounts which have an actual device or bind mount
* point. The others are stuff like proc, sysfs, binfmt_misc etc. which
* are virtual and do not actually cause disk access. */
This is why tracing /run /proc
I'm sorry I lost track of this bug.
fatrace is still acting strangely for me:
$ uname -a
Linux millbarge 5.4.0-65-generic #73-Ubuntu SMP Mon Jan 18 17:25:17 UTC 2021
x86_64 x86_64 x86_64 GNU/Linux
$ apt policy fatrace
fatrace:
Installed: 0.13-2
Candidate: 0.13-2
Version table:
*** 0.13-2
** Changed in: fatrace (Ubuntu)
Status: New => Incomplete
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Title:
no fatrace output in focal
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FTR, I just ran fatrace a lot in a current Ubuntu 20.04 VM to debug
#1885188, and it seems fine.
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Title:
no fatrace output in focal
To manage
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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Title:
no fatrace output in focal
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Hi Seth, is this still happening with the latest focal kernel? I'm
trying to reproduce the problem, but I can't:
$ cat /proc/version_signature
Ubuntu 5.4.0-18.22-generic 5.4.24
righiandr@xps-13:~$ apt policy fatrace
fatrace:
Installed: 0.13-2
Candidate: 0.13-2
Version table:
*** 0.13-2
Very curious. I tried again with new kernel and no change in results:
$ cat /proc/version_signature
Ubuntu 5.4.0-12.15-generic 5.4.8
$ uname -a
Linux millbarge 5.4.0-12-generic #15-Ubuntu SMP Tue Jan 21 15:12:29 UTC 2020
x86_64 x86_64 x86_64 GNU/Linux
$ apt policy fatrace
fatrace:
Installed:
FWIW, fatrace works fine for me under the same kernel and fatrace
version:
$ sudo fatrace
...
bash(51938): O /tmp/hi
bash(51938): CW /tmp/hi
...
tyhicks@elm:~$ cat /proc/version_signature
Ubuntu 5.4.0-12.15-generic 5.4.8
$ apt policy fatrace
fatrace:
Installed: 0.13-2
Candidate: 0.13-2
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Title:
no fatrace output in focal
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apport information
** Tags added: apport-collected
** Description changed:
Hello, fatrace in focal doesn't seem to work for me in focal.
Start fatrace in one terminal, and perform file operations in another
terminal: man man, echo hi > hi, echo hi > /run/user/1000/hi, etc.
I added the linux package too, because the strace doesn't seem too
unusual.
** Attachment added: "strace.out"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1861053/+attachment/5323430/+files/strace.out
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