From: Dan Kegel <dank@kegel.com>
To: "Luck, Tony" <tony.luck@intel.com>
Cc: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>,
"Chen, Kenneth W" <kenneth.w.chen@intel.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-aio@kvack.org
Subject: Re: Redundant memset in AIO read_events
Date: Wed, 09 Jul 2003 09:13:38 -0700 [thread overview]
Message-ID: <3F0C3F32.40301@kegel.com> (raw)
In-Reply-To: <DD755978BA8283409FB0087C39132BD101B00F79@fmsmsx404.fm.intel.com>
Luck, Tony wrote:
> That is true, but here's the definition of the io_event strcuture:
>
> struct io_event {
> __u64 data;
> __u64 obj;
> __s64 res;
> __s64 res2;
> };
>
> In the words of the comment, C may be "fun", but I've
> having trouble envisioning an architecture where a structure
> that consists of four equal sized objects has some padding!
<newbie>
There might be some architecture that requires 16 byte alignment...
how about surrounding the memcpy with if (sizeof(struct io_event) != 4 * sizeof(__u64)) ?
</newbie>
--
Dan Kegel
http://www.kegel.com
http://counter.li.org/cgi-bin/runscript/display-person.cgi?user=78045
next prev parent reply other threads:[~2003-07-09 15:42 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-09 15:43 Redundant memset in AIO read_events Luck, Tony
2003-07-09 16:13 ` Dan Kegel [this message]
-- strict thread matches above, loose matches on Subject: below --
2003-07-09 22:43 Chen, Kenneth W
2003-07-09 22:41 Chen, Kenneth W
2003-07-08 23:17 Chen, Kenneth W
2003-07-09 12:55 ` Mikulas Patocka
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