Date: Fri, 25 Jan 2008 04:09:42 -0700
From: Andreas Dilger <adilger@sun.com>
Subject: Re: [RFC] Parallelize IO for e2fsck
In-reply-to: <1201220742.7557.10.camel@localhost>
To: Zan Lynx <zlynx@acm.org>
Cc: Theodore Tso <tytso@MIT.EDU>, Adrian Bunk <bunk@kernel.org>,
       Bodo Eggert <7eggert@gmx.de>, Alan Cox <alan@lxorguk.ukuu.org.uk>,
       Valdis.Kletnieks@vt.edu, David Chinner <dgc@sgi.com>,
       Valerie Henson <val@vahconsulting.com>, linux-fsdevel@vger.kernel.org,
       linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org,
       Ric Wheeler <ric@emc.com>
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 David Chinner <dgc@sgi.com>, Valerie Henson <val@vahconsulting.com>,
 linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org,
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On Jan 24, 2008  17:25 -0700, Zan Lynx wrote:
> Have y'all been following the /dev/mem_notify patches?
> http://article.gmane.org/gmane.linux.kernel/628653

Having the notification be via poll() is a very restrictive processing
model.  Having the notification be via a signal means that any kind of
process (and not just those that are event loop driven) can register
a callback at some arbitrary point in the code and be notified.  I
don't object to the poll() interface, but it would be good to have a
signal mechanism also.

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.

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