site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; bh=PfZiVe9Z/nrwsREutJzFE/0a6U8okdI+9cVsw6JPtNA=; b=au8wjkm8a53d+Shu3dvqxYJMhC2KJ08tI3CTMGzLCqtNjar0w3xBeW4S9aAIxNFJaEg6vZv7cIyo7dlkUkwN8dv970E1IuS8CaRdx0LHiF5vceR6olrdmQbtagHQMYRZC/LG7sNNQS2hAoJuFz8cMdfKC7gZe0Xe2eGYviUKkkE= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=af+UWtVyDeRnTxqxdn1MGPw+kX99E38Q7Bive+VrC48pbOhg9UiZwq13UhBSJNHUU+J/H3h5c9PMWUKSKGjz15+jRUdDRq7MQDIc3tTydQC7NijA/2TQndg06Bgl/Wm8PDtUVT4ScByVdBHUMMxp1ALTcbU+C84gqz/uVzio5nU= Hi, Thanks for all your advice. My problem may be related to the amount of memory in the Mac. Also we've only seen the problem on G5 Macs - Intel Mac Pros work fine. One of our QA guys gets consistent test failures, and one kernel panic on a 5 GB dual G5. The G5 I have has only 512 MB of RAM. I just emailed my manager asking him to authorize the purchase of at least 4 GB more. I understand that the kernel always runs in 32-bit mode, even on machines with large memory that have userspace programs running 64-bit. How exactly is this handled by the kernel? Our tiger driver used IOMemoryCursor for PowerPC and IODMACommand for Intel, because the Tiger PPC kernel didn't provide IODMACommand. Our Leopard driver, where we're finding the test failures, uses IODMACommand on both platforms. Thanks for your help! Mike Crawford mdcrawford at gmail dot com http://www.geometricvisions.com/ <-- Free piano music downloads _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... This email sent to site_archiver@lists.apple.com