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Date: Sat, 22 Oct 2011 00:27:44 +0300
From: Andriy Gapon <avg@FreeBSD.org>
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To: John Baldwin <jhb@FreeBSD.org>
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Cc: Pavel Timofeev <timp87@gmail.com>, freebsd-current@FreeBSD.org,
	Dennis Koegel <dk@neveragain.de>
Subject: Re: Fresh installed Freebsd 9 don't boot from hd
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on 21/10/2011 23:33 John Baldwin said the following:
> On Friday, October 21, 2011 4:58:51 am Dennis Koegel wrote:
>> On Thu, Oct 20, 2011 at 11:28:08AM +0400, Pavel Timofeev wrote:
>>> I used FreeBSD 9 amd64 on my HP Proliant DL360 G5 (smart array p400i 
> mirror)
>>> as test. [...]
>>> It was fresh install and I choose guided partitioning (GPT)
>>> But after reboot my server don't boot from hd.
>>
>> We have the same issue on a DL580 G7. Install runs fine, but when it's
>> time for the first boot, the bootcode emits a single '-' (where usually
>> it would be "spinning" for a moment while loading), hangs for about two
>> seconds, and then reboots.
> 
> Working offline with Dennis, we found that changing the CFLAGS in 
> sys/boot/i386/gptboot/Makefile from "-O1" to "-Os -mrtd" (partially reverting 
> an earlier commit) fixed gptboot.  The next test for someone to do would be to 
> try just adding "-mrtd" and leaving "-O1" as-is to see if that fixes it.

Hmm, this is quite unexpected...  Do you have a hypothesis why not using -mrtd
could cause a problem (a miscompilation?) ?  I previously assumed that -O1 is
typically a quite safe optimization, not sure if it's even worth trying -O0 for
a test.

Or could this be about a size of gptboot blob?

-- 
Andriy Gapon