From: Doug McNaught <doug@mcnaught.org>
To: "Dirk Bull" <dirkbull102@hotmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: shmat problem
Date: 06 Jan 2003 09:17:52 -0500 [thread overview]
Message-ID: <m37kdiicq7.fsf@varsoon.wireboard.com> (raw)
In-Reply-To: "Dirk Bull"'s message of "Mon, 06 Jan 2003 09:05:37 +0000"
"Dirk Bull" <dirkbull102@hotmail.com> writes:
> I have a problem with the shmat() function. It works correctly when
> one doesn't specify an address where the segment should be attached,
> but fails when one does. To specify an address it must be alligned
> and I did by using __attribute__ (aligned()). Still the function
> fails. What is the most effective way for a solution
> to this problem.
__attribute__(aligned()) has nothing to do with it--the address needs
to be page-aligned (ie on a multiple of 4K for ix86), unless SHM_RND
is set in the call. You also need to make sure nothing else is mapped
at the address you're trying to use...
-Doug
next prev parent reply other threads:[~2003-01-06 14:09 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-06 9:05 shmat problem Dirk Bull
2003-01-06 14:17 ` Doug McNaught [this message]
-- strict thread matches above, loose matches on Subject: below --
2003-01-06 14:53 Dirk Bull
2003-01-06 15:32 ` Doug McNaught
2003-01-06 15:50 ` Richard B. Johnson
2003-01-06 16:22 Alex Riesen
2003-01-06 16:36 ` Doug McNaught
2003-01-06 16:43 ` Alex Riesen
2003-01-06 16:50 ` Doug McNaught
2003-01-06 17:01 ` Alex Riesen
2003-01-07 8:14 Dirk Bull
2003-01-07 18:41 ` Alex Riesen
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