[Bugs] [Bug 1465861] New: Removal of io threads from graph causes segfault in quota enable volume

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1465861

            Bug ID: 1465861
           Summary: Removal of io threads from graph causes segfault in
                    quota enable volume
           Product: GlusterFS
           Version: mainline
         Component: quota
          Assignee: bugs at gluster.org
          Reporter: sunnikri at redhat.com
                CC: bugs at gluster.org



If IO threads is removed the graph on a quota enabled volume.
The brick process segfaults on writes.

steps to reproduce.
1) create volume and enable quota on it.
2) stop the volume, remove io threads in graph and restart the volume
3) mount the volume and do IO. 
4) brick process would crash..

The below mail thread has related discussion:
http://www.spinics.net/lists/gluster-devel/msg23111.html


The issue is that marker allocates only 16k stack space for the syncop threads
and this seems to be insufficient.

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