Fanotify blocks any write operation to CIFS mounted volumes for about 10-15 secs

[pria]

Whenever we use Fanotify to monitor "CIFS" mounted volumes and
try to write to a new file by doing:

echo "ABC" > /mnt/cifs/test.c

It takes around 10-15 secs to complete the write operation.

This happens only when we try to monitor "FAN_OPEN_PERM". Looks like "FAN_OPEN_PERM" blocks and notifies only after 10-15 secs.

[pria (pria-mn9)]

The bug is seen in kernel versions that are 3.2.0 or above.

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1247773/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Quinn Balazs (qbalazs)]

Please use "apport-collect 1247773" to fetch all relevant files.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.12 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12-saucy/

[pria (pria-mn9)]

Any updates on this ?

[penalvch (penalvch)]

pria, thank you for reporting this bug to Ubuntu. linux-lts-saucy reached EOL on August 2014.
See the following documents for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases
https://wiki.ubuntu.com/Kernel/LTSEnablementStack

If this is still reproducible in a supported release, please upgrade and then execute the following in a terminal:
apport-collect 1247773

Otherwise, please mark this as Invalid.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]