From: kumon@flab.fujitsu.co.jp
To: Manfred Spraul <manfred@colorfullife.com>
Cc: Davide Libenzi <davidel@xmailserver.org>,
Shuji YAMAMURA <yamamura@flab.fujitsu.co.jp>,
lkml <linux-kernel@vger.kernel.org>
Cc: kumon@flab.fujitsu.co.jp
Subject: Re: [PATCH] task_struct + kernel stack colouring ...
Date: Thu, 6 Dec 2001 09:12:45 +0900 [thread overview]
Message-ID: <200112060012.JAA04482@asami.proc.flab.fujitsu.co.jp> (raw)
In-Reply-To: <3C0E84B4.1070808@colorfullife.com>
In-Reply-To: <Pine.LNX.4.40.0112051103100.1644-100000@blue1.dev.mcafeelabs.com> <3C0E84B4.1070808@colorfullife.com>
Manfred Spraul writes:
> Shuij, I don't understand why you need both a shift and a modulo:
> address % odd_number should generate a random distribution (i.e. all
> bits affect the result), even without the shift.
The lame duck reason was: previously it was intended to use within
Current macro, the division should be avoided such a frequently used
operation.
Currently the stack coloring operation is required only at process
creation time, division by a odd number is sufficient and we'll
experiment it.
--
Kouichi Kumon, Software Laboratory, Fujitsu Labs.
kumon@flab.fujitsu.co.jp
next prev parent reply other threads:[~2001-12-06 0:13 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-04 2:13 Davide Libenzi
2001-12-05 12:22 ` Shuji YAMAMURA
2001-12-05 19:23 ` Davide Libenzi
2001-12-05 20:33 ` Manfred Spraul
2001-12-05 21:00 ` Davide Libenzi
2001-12-06 0:12 ` kumon [this message]
2001-12-06 8:34 ` Shuji YAMAMURA
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