[lvm-devel] [PATCH] Avoid recursive calls from dmeventd to itself

[Petr Rockai]

Hi,

the attached patch keeps the LVM-based dmeventd plugins from trying to
manipulate the dmeventd monitoring state of the logical volumes they are
currently acting on.

Until now, every time a logical volume has been changed by a dmeventd
plugin, this plugin would have called back to dmeventd through the
external FIFO mechanism. I am fairly sure this is superfluous,
inefficient and possibly even dangerous.

It is probably related to RHBZ 707056 and I wouldn't be surprised if
this sometimes caused mirror repair issues. With the patch, the
incidence of "No longer monitoring..." messages while repairing mirrors
drops dramatically.

Yours,
   Petr

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