From: "KOSAKI Motohiro" <kosaki.motohiro@gmail.com>
Subject: Re: [RFC] Parallelize IO for e2fsck
Date: Sat, 26 Jan 2008 20:56:24 +0900
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> The commentary on the mem_notify threads claimed that the signal is
> easily provided by setting up the file handle for SIGIO.

BTW:
Of cource, you can receive any signal instead SIGIO by use fcntl(F_SETSIG)  :-)