Date: Tue, 12 Dec 2017 15:19:23 -0800 From: Mark Millard <markmi@dsl-only.net> To: Andreas Schwarz <freebsd.asc@strcmp.org> Cc: jeff@FreeBSD.org, Freebsd-arm <freebsd-arm@freebsd.org>, FreeBSD Hackers <freebsd-hackers@freebsd.org>, FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: A head kernel rpi2 boot-hang bisected: -r326346 good; -r326347 and later hangs-up during boot Message-ID: <241F43AF-23B2-4C54-9B77-A5A7CE3F8E57@dsl-only.net> In-Reply-To: <4b2420e8899.5992ee2b@mail.schwarzes.net> References: <32649011-1CFA-4215-BB37-00E4493882CD@dsl-only.net> <4b2420e8899.5992ee2b@mail.schwarzes.net>
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On 2017-Dec-12, at 2:02 PM, Andreas Schwarz <freebsd.asc at strcmp.org> = wrote: > On 12.12.17, Mark Millard wrote: >=20 >> I initially jumped from -r326192 to -r326726 and >> ended up with a rpi2 that would normally hang >> somewhere around release APs being displayed. >> (I have had a couple of completed boots but many >> dozens of hung-up attempts.) Both a debug kernel >> and a non-debug kernel hang the same way. >>=20 >> Bisecting the kernel (holding world -r326726 >> constant) showed: >>=20 >> -r326346 did not hang (nor did before) >> -r326347 and later hung. >=20 > JFYI, the latest kernel (and world) running at one of my=20 > RPI2-B is r326631, without any issues. Interesting. (By the way: My context is with a V1.1 Cortex-A7 based rpi2, not V1.2 and Cortex-A53.) I've almost always run the root file system being on a USB SSD instead of on mmcsd0 . I wonder if that is somehow involved since it may be unusual. UFS file system. The USB SSD is on a powered hub that is in turn plugged into the rpi2. [I had the hang problem before the following and after.] The mechanism for holding mmcsd0 in failed recently but the ejection mechanism still works. So I hold in mmcsd0 until after I get a USB SSD boot now. (Interrupt boot, unload, boot/autoboot, picks up the kernel from the USB SSD.) This means that I effectively can not avoid the USB SSD any more unless I get my hands on a different V1.1 rpi2. =3D=3D=3D Mark Millard markmi at dsl-only.net
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